fix: cancel persist timer on dispose to prevent post-dispose writes

- Clamp ML predictions between physics floor (raw airtime) and ceiling
  (worst-case formula) so model can never produce unsafe timeouts
- Replace hourOfDay feature with secondsSinceLastRx for network activity
- Remove unused _ContactStats.stdDev and dead model persistence code
- Debounce observation writes (2s) instead of writing on every delivery
- Skip recording observations when pathLength is null to avoid corrupting
  training data
- Add comment explaining global (not per-contact) RX time tracking
- Remove notifyListeners from retrain to avoid unnecessary widget rebuilds
- Run dart format

.swift-version

@@ -0,0 +1 @@
+6.2.4

lib/connector/meshcore_connector.dart

@@ -2,7 +2,6 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:crypto/crypto.dart' as crypto;
-import 'package:meshcore_open/models/discovery_contact.dart';
 import 'package:pointycastle/export.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_blue_plus/flutter_blue_plus.dart';
@@ -20,8 +19,10 @@ import '../services/message_retry_service.dart';
 import '../services/path_history_service.dart';
 import '../services/app_settings_service.dart';
 import '../services/background_service.dart';
+import '../services/timeout_prediction_service.dart';
 import '../services/notification_service.dart';
 import 'meshcore_connector_usb.dart';
+import 'meshcore_connector_tcp.dart';
 import '../storage/channel_message_store.dart';
 import '../storage/channel_order_store.dart';
 import '../storage/channel_settings_store.dart';
@@ -86,7 +87,7 @@ enum MeshCoreConnectionState {
   disconnecting,
 }
 
-enum MeshCoreTransportType { bluetooth, usb }
+enum MeshCoreTransportType { bluetooth, usb, tcp }
 
 class RepeaterBatterySnapshot {
   final int millivolts;
@@ -116,11 +117,12 @@ class MeshCoreConnector extends ChangeNotifier {
   bool _manualDisconnect = false;
   final MeshCoreUsbManager _usbManager = MeshCoreUsbManager();
   StreamSubscription<Uint8List>? _usbFrameSubscription;
+  final MeshCoreTcpConnector _tcpConnector = MeshCoreTcpConnector();
   MeshCoreTransportType _activeTransport = MeshCoreTransportType.bluetooth;
 
   final List<ScanResult> _scanResults = [];
   final List<Contact> _contacts = [];
-  final List<DiscoveryContact> _discoveredContacts = [];
+  final List<Contact> _discoveredContacts = [];
   final List<Channel> _channels = [];
   final Map<String, List<Message>> _conversations = {};
   final Map<int, List<ChannelMessage>> _channelMessages = {};
@@ -165,6 +167,10 @@ class MeshCoreConnector extends ChangeNotifier {
   bool _isLoadingContacts = false;
   bool _isLoadingChannels = false;
   bool _hasLoadedChannels = false;
+  TimeoutPredictionService? _timeoutPredictionService;
+  // Intentionally global (not per-contact): tracks overall network activity.
+  // Frequent RX from any source indicates a busy network with more collisions.
+  DateTime _lastRxTime = DateTime.now();
   bool _batteryRequested = false;
   bool _awaitingSelfInfo = false;
   bool _hasReceivedDeviceInfo = false;
@@ -198,6 +204,9 @@ class MeshCoreConnector extends ChangeNotifier {
   int _queueSyncRetries = 0;
   static const int _maxQueueSyncRetries = 3;
   static const int _queueSyncTimeoutMs = 5000; // 5 second timeout
+  // Serializes path operations (setContactPath/clearContactPath) to prevent
+  // interleaved async calls from leaving in-memory state inconsistent with device.
+  Future<void> _pathOpLock = Future.value();
   Map<String, String>? _currentCustomVars;
 
   // Channel syncing state (sequential pattern)
@@ -255,6 +264,10 @@ class MeshCoreConnector extends ChangeNotifier {
   bool get isUsbTransportConnected =>
       _state == MeshCoreConnectionState.connected &&
       _activeTransport == MeshCoreTransportType.usb;
+  String? get activeTcpEndpoint => _tcpConnector.activeEndpoint;
+  bool get isTcpTransportConnected =>
+      _state == MeshCoreConnectionState.connected &&
+      _activeTransport == MeshCoreTransportType.tcp;
 
   String get deviceDisplayName {
     if (_selfName != null && _selfName!.isNotEmpty) {
@@ -281,7 +294,7 @@ class MeshCoreConnector extends ChangeNotifier {
     );
   }
 
-  List<DiscoveryContact> get discoveredContacts {
+  List<Contact> get discoveredContacts {
     return List.unmodifiable(_discoveredContacts);
   }
 
@@ -553,6 +566,10 @@ class MeshCoreConnector extends ChangeNotifier {
       _unreadStore.saveContactUnreadCount(
         Map<String, int>.from(_contactUnreadCount),
       );
+      _notificationService.clearContactNotification(
+        contactKeyHex,
+        getTotalUnreadCount(),
+      );
       notifyListeners();
     }
   }
@@ -571,6 +588,10 @@ class MeshCoreConnector extends ChangeNotifier {
           _channels.isNotEmpty ? _channels : _cachedChannels,
         ),
       );
+      _notificationService.clearChannelNotification(
+        channelIndex,
+        getTotalUnreadCount(),
+      );
       notifyListeners();
     }
   }
@@ -652,6 +673,7 @@ class MeshCoreConnector extends ChangeNotifier {
     BleDebugLogService? bleDebugLogService,
     AppDebugLogService? appDebugLogService,
     BackgroundService? backgroundService,
+    TimeoutPredictionService? timeoutPredictionService,
   }) {
     _retryService = retryService;
     _pathHistoryService = pathHistoryService;
@@ -659,12 +681,13 @@ class MeshCoreConnector extends ChangeNotifier {
     _bleDebugLogService = bleDebugLogService;
     _appDebugLogService = appDebugLogService;
     _backgroundService = backgroundService;
+    _timeoutPredictionService = timeoutPredictionService;
     _usbManager.setDebugLogService(_appDebugLogService);
+    _tcpConnector.setDebugLogService(_appDebugLogService);
 
     // Initialize notification service
     _notificationService.initialize();
     _loadChannelOrder();
-    _loadDiscoveredContactCache();
 
     // Initialize retry service callbacks
     _retryService?.initialize(
@@ -673,13 +696,28 @@ class MeshCoreConnector extends ChangeNotifier {
       updateMessageCallback: _updateMessage,
       clearContactPathCallback: clearContactPath,
       setContactPathCallback: setContactPath,
-      calculateTimeoutCallback: (pathLength, messageBytes) =>
+      calculateTimeoutCallback:
-          calculateTimeout(pathLength: pathLength, messageBytes: messageBytes),
+          (pathLength, messageBytes, {String? contactKey}) => calculateTimeout(
+            pathLength: pathLength,
+            messageBytes: messageBytes,
+            contactKey: contactKey,
+          ),
       getSelfPublicKeyCallback: () => _selfPublicKey,
       prepareContactOutboundTextCallback: prepareContactOutboundText,
       appSettingsService: appSettingsService,
       debugLogService: _appDebugLogService,
       recordPathResultCallback: _recordPathResult,
+      onDeliveryObservedCallback:
+          (contactKey, pathLength, messageBytes, tripTimeMs) {
+            final secSinceRx = DateTime.now().difference(_lastRxTime).inSeconds;
+            _timeoutPredictionService?.recordObservation(
+              contactKey: contactKey,
+              pathLength: pathLength,
+              messageBytes: messageBytes,
+              tripTimeMs: tripTimeMs,
+              secondsSinceLastRx: secSinceRx,
+            );
+          },
     );
   }
 
@@ -966,6 +1004,142 @@ class MeshCoreConnector extends ChangeNotifier {
     }
   }
 
+  Future<void> connectTcp({required String host, required int port}) async {
+    if (_state == MeshCoreConnectionState.connecting ||
+        _state == MeshCoreConnectionState.connected) {
+      _appDebugLogService?.warn(
+        'connectTcp ignored: already $_state',
+        tag: 'TCP',
+      );
+      return;
+    }
+
+    _appDebugLogService?.info('connectTcp: endpoint=$host:$port', tag: 'TCP');
+
+    await stopScan();
+    _cancelReconnectTimer();
+    _manualDisconnect = false;
+    _resetConnectionHandshakeState();
+    _activeTransport = MeshCoreTransportType.tcp;
+    _setState(MeshCoreConnectionState.connecting);
+
+    try {
+      Future<void> handleTcpConnectAbort({required String message}) async {
+        _appDebugLogService?.warn(message, tag: 'TCP');
+        final shouldResetState = shouldResetStateAfterTcpConnectAbort(
+          state: _state,
+          activeTransport: _activeTransport,
+        );
+        if (shouldResetState) {
+          await disconnect(manual: false);
+          return;
+        }
+        if (_tcpConnector.isConnected) {
+          await _tcpConnector.disconnect();
+        }
+      }
+
+      await _tcpConnector.cancelFrameSubscription();
+      await _tcpConnector.connect(host: host, port: port);
+      final isTcpConnectCancelled =
+          _activeTransport != MeshCoreTransportType.tcp ||
+          _state != MeshCoreConnectionState.connecting ||
+          !_tcpConnector.isConnected;
+      if (isTcpConnectCancelled) {
+        await handleTcpConnectAbort(
+          message:
+              'connectTcp aborted before handshake: state=$_state transport=$_activeTransport connected=${_tcpConnector.isConnected}',
+        );
+        return;
+      }
+      notifyListeners();
+
+      await Future<void>.delayed(const Duration(milliseconds: 200));
+      final isTcpConnectCancelledAfterDelay =
+          _activeTransport != MeshCoreTransportType.tcp ||
+          _state != MeshCoreConnectionState.connecting ||
+          !_tcpConnector.isConnected;
+      if (isTcpConnectCancelledAfterDelay) {
+        await handleTcpConnectAbort(
+          message:
+              'connectTcp aborted after connect delay: state=$_state transport=$_activeTransport connected=${_tcpConnector.isConnected}',
+        );
+        return;
+      }
+      _tcpConnector.listenFrames(
+        onFrame: _handleFrame,
+        onError: (error, stackTrace) {
+          _appDebugLogService?.error('TCP transport error: $error', tag: 'TCP');
+          unawaited(disconnect(manual: false));
+        },
+        onDone: () {
+          _appDebugLogService?.warn('TCP frame stream ended', tag: 'TCP');
+          unawaited(disconnect(manual: false));
+        },
+      );
+
+      _setState(MeshCoreConnectionState.connected);
+      _pendingInitialChannelSync = true;
+      await _requestDeviceInfo();
+      _startBatteryPolling();
+
+      var gotSelfInfo = await _waitForSelfInfo(
+        timeout: const Duration(seconds: 3),
+      );
+      if (!gotSelfInfo) {
+        await refreshDeviceInfo();
+        gotSelfInfo = await _waitForSelfInfo(
+          timeout: const Duration(seconds: 3),
+        );
+      }
+      if (!gotSelfInfo) {
+        throw StateError('Timed out waiting for SELF_INFO during TCP connect');
+      }
+
+      await syncTime();
+    } catch (error) {
+      _appDebugLogService?.error('TCP connection error: $error', tag: 'TCP');
+      final tcpConnectCancelledBeforeHandshake =
+          shouldIgnoreLateTcpConnectError(
+            manualDisconnect: _manualDisconnect,
+            state: _state,
+            activeTransport: _activeTransport,
+            tcpManagerConnected: _tcpConnector.isConnected,
+          );
+      if (tcpConnectCancelledBeforeHandshake) {
+        _appDebugLogService?.info(
+          'Ignoring late TCP connect error after cancellation/switch: state=$_state transport=$_activeTransport',
+          tag: 'TCP',
+        );
+        return;
+      }
+      await disconnect(manual: false);
+      rethrow;
+    }
+  }
+
+  @visibleForTesting
+  static bool shouldIgnoreLateTcpConnectError({
+    required bool manualDisconnect,
+    required MeshCoreConnectionState state,
+    required MeshCoreTransportType activeTransport,
+    required bool tcpManagerConnected,
+  }) {
+    return manualDisconnect &&
+        (state == MeshCoreConnectionState.disconnected ||
+            state == MeshCoreConnectionState.disconnecting) &&
+        (activeTransport != MeshCoreTransportType.tcp || !tcpManagerConnected);
+  }
+
+  @visibleForTesting
+  static bool shouldResetStateAfterTcpConnectAbort({
+    required MeshCoreConnectionState state,
+    required MeshCoreTransportType activeTransport,
+  }) {
+    return state == MeshCoreConnectionState.connecting &&
+        activeTransport == MeshCoreTransportType.tcp;
+  }
+
   Future<void> connect(BluetoothDevice device, {String? displayName}) async {
     if (_state == MeshCoreConnectionState.connecting ||
         _state == MeshCoreConnectionState.connected) {
@@ -1231,6 +1405,7 @@ class MeshCoreConnector extends ChangeNotifier {
 
   bool get _shouldGateInitialChannelSync =>
       _activeTransport == MeshCoreTransportType.usb ||
+      _activeTransport == MeshCoreTransportType.tcp ||
       (_activeTransport == MeshCoreTransportType.bluetooth &&
           PlatformInfo.isWeb);
 
@@ -1277,9 +1452,11 @@ class MeshCoreConnector extends ChangeNotifier {
   Future<void> disconnect({bool manual = true}) async {
     if (_state == MeshCoreConnectionState.disconnecting) return;
     final transportAtDisconnect = _activeTransport;
-    final transportLabel = transportAtDisconnect == MeshCoreTransportType.usb
+    final transportLabel = switch (transportAtDisconnect) {
-        ? 'USB'
+      MeshCoreTransportType.bluetooth => 'BLE',
-        : 'BLE';
+      MeshCoreTransportType.usb => 'USB',
+      MeshCoreTransportType.tcp => 'TCP',
+    };
 
     _appDebugLogService?.info(
       'Starting disconnect transport=$transportLabel manual=$manual',
@@ -1299,6 +1476,7 @@ class MeshCoreConnector extends ChangeNotifier {
     await _usbFrameSubscription?.cancel();
     _usbFrameSubscription = null;
     await _usbManager.disconnect();
+    await _tcpConnector.disconnect();
 
     await _notifySubscription?.cancel();
     _notifySubscription = null;
@@ -1380,6 +1558,8 @@ class MeshCoreConnector extends ChangeNotifier {
 
     if (_activeTransport == MeshCoreTransportType.usb) {
       await _usbManager.write(data);
+    } else if (_activeTransport == MeshCoreTransportType.tcp) {
+      await _tcpConnector.write(data);
     } else {
       if (_rxCharacteristic == null) {
         throw Exception("MeshCore RX characteristic not available");
@@ -1593,18 +1773,33 @@ class MeshCoreConnector extends ChangeNotifier {
     Uint8List customPath,
     int pathLen,
   ) async {
-    if (!isConnected) return;
+    // Serialize path operations to prevent interleaved async calls from
+    // leaving in-memory state inconsistent with the device.
+    final prev = _pathOpLock;
+    final completer = Completer<void>();
+    _pathOpLock = completer.future;
+    await prev;
+    try {
+      if (!isConnected) return;
 
-    await sendFrame(
+      await sendFrame(
-      buildUpdateContactPathFrame(
+        buildUpdateContactPathFrame(
-        contact.publicKey,
+          contact.publicKey,
-        customPath,
+          customPath,
-        pathLen,
+          pathLen,
-        type: contact.type,
+          type: contact.type,
-        flags: contact.flags,
+          flags: contact.flags,
-        name: contact.name,
+          name: contact.name,
-      ),
+        ),
-    );
+      );
+      // USB writes return instantly (no BLE flow control), so give the firmware
+      // time to persist the path change before subsequent commands.
+      if (_activeTransport == MeshCoreTransportType.usb) {
+        await Future<void>.delayed(const Duration(milliseconds: 100));
+      }
+    } finally {
+      completer.complete();
+    }
   }
 
   Future<void> setContactFavorite(Contact contact, bool isFavorite) async {
@@ -1904,7 +2099,11 @@ class MeshCoreConnector extends ChangeNotifier {
   Future<void> removeContact(Contact contact) async {
     if (!isConnected) return;
 
-    _handleDiscovery(contact, Uint8List(0), noNotify: true);
+    _handleDiscovery(
+      contact,
+      contact.rawPacket ?? Uint8List(0),
+      noNotify: true,
+    );
 
     await sendFrame(buildRemoveContactFrame(contact.publicKey));
     _contacts.removeWhere((c) => c.publicKeyHex == contact.publicKeyHex);
@@ -1920,7 +2119,20 @@ class MeshCoreConnector extends ChangeNotifier {
     notifyListeners();
   }
 
-  Future<void> removeDiscoveredContact(DiscoveryContact contact) async {
+  Future<void> updateKnownDiscovered() async {
+    if (!isConnected) return;
+    for (int i = 0; i < _discoveredContacts.length; i++) {
+      _discoveredContacts[i] = _discoveredContacts[i].copyWith(
+        isActive: _knownContactKeys.contains(
+          _discoveredContacts[i].publicKeyHex,
+        ),
+      );
+    }
+    unawaited(_persistDiscoveredContacts());
+    notifyListeners();
+  }
+
+  Future<void> removeDiscoveredContact(Contact contact) async {
     if (!isConnected) return;
     _discoveredContacts.removeWhere(
       (c) => c.publicKeyHex == contact.publicKeyHex,
@@ -1929,7 +2141,7 @@ class MeshCoreConnector extends ChangeNotifier {
     notifyListeners();
   }
 
-  Future<void> importDiscoveredContact(DiscoveryContact contact) async {
+  Future<void> importDiscoveredContact(Contact contact) async {
     if (!isConnected) return;
 
     await sendFrame(
@@ -1938,11 +2150,23 @@ class MeshCoreConnector extends ChangeNotifier {
         contact.path,
         contact.pathLength,
         type: contact.type,
-        flags: 0,
+        flags: contact.flags,
         name: contact.name,
+        lat: contact.latitude,
+        lon: contact.longitude,
+        lastModified: contact.lastSeen,
       ),
     );
 
+    // Update the discovered contact to mark it as active (imported)
+    final discoveredIndex = _discoveredContacts.indexWhere(
+      (c) => c.publicKeyHex == contact.publicKeyHex,
+    );
+    if (discoveredIndex >= 0) {
+      _discoveredContacts[discoveredIndex] =
+          _discoveredContacts[discoveredIndex].copyWith(isActive: true);
+    }
+
     _handleContactAdvert(
       Contact(
         publicKey: contact.publicKey,
@@ -1953,29 +2177,41 @@ class MeshCoreConnector extends ChangeNotifier {
         latitude: contact.latitude,
         longitude: contact.longitude,
         lastSeen: DateTime.now(),
+        flags: contact.flags,
       ),
     );
     notifyListeners();
   }
 
   Future<void> clearContactPath(Contact contact) async {
-    if (!isConnected) return;
+    // Serialize path operations to prevent interleaved async calls.
+    final prev = _pathOpLock;
+    final completer = Completer<void>();
+    _pathOpLock = completer.future;
+    await prev;
+    try {
+      if (!isConnected) return;
 
-    await sendFrame(buildResetPathFrame(contact.publicKey));
+      await sendFrame(buildResetPathFrame(contact.publicKey));
-    final existingIndex = _contacts.indexWhere(
+      if (_activeTransport == MeshCoreTransportType.usb) {
-      (c) => c.publicKeyHex == contact.publicKeyHex,
+        await Future<void>.delayed(const Duration(milliseconds: 100));
-    );
+      }
-    if (existingIndex >= 0) {
+      final existingIndex = _contacts.indexWhere(
-      final existing = _contacts[existingIndex];
+        (c) => c.publicKeyHex == contact.publicKeyHex,
-      // Use copyWith to preserve pathOverride and pathOverrideBytes
-      _contacts[existingIndex] = existing.copyWith(
-        pathLength: -1,
-        path: Uint8List(0),
       );
-      notifyListeners();
+      if (existingIndex >= 0) {
-      unawaited(_persistContacts());
+        final existing = _contacts[existingIndex];
+        // Preserve pathOverride and pathOverrideBytes — only reset device path
+        _contacts[existingIndex] = existing.copyWith(
+          pathLength: -1,
+          path: Uint8List(0),
+        );
+        notifyListeners();
+        unawaited(_persistContacts());
+      }
+    } finally {
+      completer.complete();
     }
-    // The device will send updated contact info with path_len = -1
   }
 
   void updateContactInMemory(
@@ -2284,6 +2520,7 @@ class MeshCoreConnector extends ChangeNotifier {
 
   void _handleFrame(List<int> data) {
     if (data.isEmpty) return;
+    _lastRxTime = DateTime.now();
 
     final frame = Uint8List.fromList(data);
     _receivedFramesController.add(frame);
@@ -2311,6 +2548,9 @@ class MeshCoreConnector extends ChangeNotifier {
         _isLoadingContacts = true;
         notifyListeners();
         break;
+      case pushCodeAdvert:
+        // Known contact was seen again - just a pub key, no action needed
+        break;
       case pushCodeNewAdvert:
         debugPrint('Got New CONTACT');
         // It's the same format as respCodeContact, so we can reuse the handler
@@ -2324,6 +2564,7 @@ class MeshCoreConnector extends ChangeNotifier {
         debugPrint('Got END_OF_CONTACTS');
         _isLoadingContacts = false;
         _preserveContactsOnRefresh = false;
+        unawaited(updateKnownDiscovered());
         notifyListeners();
         unawaited(_persistContacts());
         if (PlatformInfo.isWeb &&
@@ -2339,7 +2580,8 @@ class MeshCoreConnector extends ChangeNotifier {
         }
         if (_pendingDeferredChannelSyncAfterContacts &&
             (_activeTransport == MeshCoreTransportType.bluetooth ||
-                _activeTransport == MeshCoreTransportType.usb)) {
+                _activeTransport == MeshCoreTransportType.usb ||
+                _activeTransport == MeshCoreTransportType.tcp)) {
           _pendingDeferredChannelSyncAfterContacts = false;
           _pendingInitialChannelSync = false;
           unawaited(getChannels());
@@ -2510,6 +2752,7 @@ class MeshCoreConnector extends ChangeNotifier {
     // Load persisted channel messages
     loadAllChannelMessages();
     loadUnreadState();
+    _loadDiscoveredContactCache();
 
     _awaitingSelfInfo = false;
     _selfInfoRetryTimer?.cancel();
@@ -2527,14 +2770,16 @@ class MeshCoreConnector extends ChangeNotifier {
     if (PlatformInfo.isWeb &&
         _activeTransport == MeshCoreTransportType.bluetooth) {
       _pendingInitialContactsSync = true;
-    } else if (_activeTransport == MeshCoreTransportType.usb) {
+    } else if (_activeTransport == MeshCoreTransportType.usb ||
+        _activeTransport == MeshCoreTransportType.tcp) {
       _pendingDeferredChannelSyncAfterContacts = true;
       getContacts();
     } else {
       getContacts();
     }
     if (_shouldGateInitialChannelSync &&
-        _activeTransport != MeshCoreTransportType.usb) {
+        _activeTransport != MeshCoreTransportType.usb &&
+        _activeTransport != MeshCoreTransportType.tcp) {
       _maybeStartInitialChannelSync();
     }
   }
@@ -2652,38 +2897,68 @@ class MeshCoreConnector extends ChangeNotifier {
     }
   }
 
-  /// Calculate timeout for a message based on radio settings and path length
+  /// Estimate single-packet airtime in ms from radio settings, or a fallback.
-  /// Returns timeout in milliseconds, considering number of hops
+  int _estimateAirtimeMs(int messageBytes) {
-  int calculateTimeout({required int pathLength, int messageBytes = 100}) {
-    // If we have radio settings, use them for accurate calculation
     if (_currentFreqHz != null &&
         _currentBwHz != null &&
         _currentSf != null &&
         _currentCr != null) {
       final cr = _currentCr! <= 4 ? _currentCr! : _currentCr! - 4;
-      return calculateMessageTimeout(
+      return calculateLoRaAirtime(
-        freqHz: _currentFreqHz!,
+        payloadBytes: messageBytes,
-        bwHz: _currentBwHz!,
+        spreadingFactor: _currentSf!,
-        sf: _currentSf!,
+        bandwidthHz: _currentBwHz!,
-        cr: cr,
+        codingRate: cr,
-        pathLength: pathLength,
+        lowDataRateOptimize: _currentSf! >= 11,
-        messageBytes: messageBytes,
       );
     }
+    return 50; // fallback: ~SF7/BW125 for 100 bytes
+  }
 
-    // Fallback: Conservative estimates based on typical settings
+  /// Physics-based worst-case timeout (ceiling).
-    // Assume SF7, BW125, which gives ~50ms airtime for 100 bytes
+  int _physicsMaxTimeout(int pathLength, int airtime) {
-    const estimatedAirtime = 50;
-
     if (pathLength < 0) {
-      // Flood mode: Base delay + 16× airtime
+      return 500 + (16 * airtime);
-      return 500 + (16 * estimatedAirtime);
     } else {
-      // Direct path: Base delay + ((airtime×6 + 250ms)×(hops+1))
+      return 500 + ((airtime * 6 + 250) * (pathLength + 1));
-      return 500 + ((estimatedAirtime * 6 + 250) * (pathLength + 1));
     }
   }
 
+  /// Physics-based minimum timeout (floor): raw traversal time.
+  int _physicsMinTimeout(int pathLength, int airtime) {
+    if (pathLength < 0) {
+      return airtime;
+    } else {
+      return airtime * (pathLength + 1);
+    }
+  }
+
+  /// Calculate timeout for a message based on radio settings and path length.
+  /// Returns timeout in milliseconds, considering number of hops.
+  int calculateTimeout({
+    required int pathLength,
+    int messageBytes = 100,
+    String? contactKey,
+  }) {
+    final airtime = _estimateAirtimeMs(messageBytes);
+    final physicsMin = _physicsMinTimeout(pathLength, airtime);
+    final physicsMax = _physicsMaxTimeout(pathLength, airtime);
+
+    // Try ML-based prediction, clamped between physics bounds
+    final secSinceRx = DateTime.now().difference(_lastRxTime).inSeconds;
+    final mlTimeout = _timeoutPredictionService?.predictTimeout(
+      contactKey: contactKey,
+      pathLength: pathLength,
+      messageBytes: messageBytes,
+      secondsSinceLastRx: secSinceRx,
+    );
+    if (mlTimeout != null) {
+      return mlTimeout.clamp(physicsMin, physicsMax);
+    }
+
+    return physicsMax;
+  }
+
   void _handleContact(Uint8List frame, {bool isContact = true}) {
     final contact = Contact.fromFrame(frame);
     if (contact != null) {
@@ -4302,6 +4577,7 @@ class MeshCoreConnector extends ChangeNotifier {
     _batteryPollTimer?.cancel();
     _receivedFramesController.close();
     _usbManager.dispose();
+    _tcpConnector.dispose();
 
     // Flush pending unread writes before disposal
     _unreadStore.flush();
@@ -4406,7 +4682,7 @@ class MeshCoreConnector extends ChangeNotifier {
     }
 
     importDiscoveredContact(
-      DiscoveryContact(
+      Contact(
         rawPacket: frame,
         publicKey: publicKey,
         name: name,
@@ -4477,6 +4753,7 @@ class MeshCoreConnector extends ChangeNotifier {
 
     if (isNewContact) {
       final newContact = Contact(
+        rawPacket: rawPacket,
         publicKey: publicKey,
         name: name,
         type: type,
@@ -4622,13 +4899,15 @@ class MeshCoreConnector extends ChangeNotifier {
             latitude: contact.latitude,
             longitude: contact.longitude,
             lastSeen: contact.lastSeen,
+            flags: 0,
+            isActive: false,
           );
       notifyListeners();
       unawaited(_persistDiscoveredContacts());
       return;
     }
 
-    final disContact = DiscoveryContact(
+    final disContact = Contact(
       rawPacket: rawPacket,
       publicKey: contact.publicKey,
       name: contact.name,
@@ -4638,6 +4917,9 @@ class MeshCoreConnector extends ChangeNotifier {
       latitude: contact.latitude,
       longitude: contact.longitude,
       lastSeen: contact.lastSeen,
+      lastMessageAt: contact.lastMessageAt,
+      isActive: false,
+      flags: 0,
     );
     _discoveredContacts.add(disContact);
 

lib/connector/meshcore_connector_tcp.dart

@@ -0,0 +1,70 @@
+import 'dart:async';
+import 'dart:typed_data';
+
+import '../services/app_debug_log_service.dart';
+import '../services/tcp_transport_service.dart';
+
+/// Manages TCP transport for MeshCore devices.
+///
+/// Owns the [TcpTransportService] and TCP-specific connection state.
+/// The main [MeshCoreConnector] delegates all TCP operations here.
+class MeshCoreTcpConnector {
+  final TcpTransportService _service = TcpTransportService();
+  AppDebugLogService? _debugLog;
+  StreamSubscription<Uint8List>? _frameSubscription;
+
+  // --- Getters ---
+  String? get activeEndpoint => _service.activeEndpoint;
+  bool get isConnected => _service.isConnected;
+
+  // --- Configuration ---
+  void setDebugLogService(AppDebugLogService? service) {
+    _debugLog = service;
+    _service.setDebugLogService(service);
+  }
+
+  // --- Connection lifecycle ---
+  Future<void> connect({required String host, required int port}) async {
+    _debugLog?.info('TcpConnector.connect endpoint=$host:$port', tag: 'TCP');
+    await _frameSubscription?.cancel();
+    _frameSubscription = null;
+    await _service.connect(host: host, port: port);
+    _debugLog?.info(
+      'TcpConnector.connect done, endpoint=${_service.activeEndpoint}',
+      tag: 'TCP',
+    );
+  }
+
+  StreamSubscription<Uint8List> listenFrames({
+    required void Function(Uint8List) onFrame,
+    required void Function(Object, StackTrace?) onError,
+    required void Function() onDone,
+  }) {
+    _frameSubscription = _service.frameStream.listen(
+      onFrame,
+      onError: onError,
+      onDone: onDone,
+    );
+    return _frameSubscription!;
+  }
+
+  Future<void> cancelFrameSubscription() async {
+    await _frameSubscription?.cancel();
+    _frameSubscription = null;
+  }
+
+  Future<void> disconnect() async {
+    if (!_service.isConnected && _frameSubscription == null) return;
+    _debugLog?.info('TcpConnector.disconnect', tag: 'TCP');
+    await _frameSubscription?.cancel();
+    _frameSubscription = null;
+    await _service.disconnect();
+  }
+
+  Future<void> write(Uint8List data) => _service.write(data);
+
+  void dispose() {
+    _frameSubscription?.cancel();
+    _service.dispose();
+  }
+}

lib/connector/meshcore_connector_usb.dart

@@ -53,6 +53,9 @@ class MeshCoreUsbManager {
   }
 
   Future<void> disconnect() async {
+    if (!_service.isConnected && _activePortKey == null) {
+      return;
+    }
     _debugLog?.info('UsbManager.disconnect', tag: 'USB');
     await _service.disconnect();
     _activePortKey = null;

lib/connector/meshcore_protocol.dart

@@ -148,6 +148,19 @@ class BufferWriter {
   void writeHex(String hex) {
     writeBytes(hex2Uint8List(hex));
   }
+
+  void writeBytesPadded(Uint8List bytes, int totalLength) {
+    // Path data (64 bytes, zero-padded)
+    final bytesPadded = Uint8List(totalLength);
+    final len = bytes.length < totalLength ? bytes.length : totalLength;
+    if (bytes.isNotEmpty && len > 0) {
+      final copyLen = bytes.length < totalLength ? bytes.length : totalLength;
+      for (int i = 0; i < copyLen; i++) {
+        bytesPadded[i] = bytes[i];
+      }
+    }
+    writeBytes(bytesPadded);
+  }
 }
 
 Uint8List hex2Uint8List(String hex) {
@@ -676,14 +689,17 @@ Uint8List buildResetPathFrame(Uint8List pubKey) {
 }
 
 // Build CMD_ADD_UPDATE_CONTACT frame to set custom path
-// Format: [cmd][pub_key x32][type][flags][path_len][path x64][name x32][timestamp x4]
+// Format: [cmd][pub_key x32][type][flags][path_len][path x64][name x32][Lat? x4, Lon? x4][timestamp? x4]
 Uint8List buildUpdateContactPathFrame(
   Uint8List pubKey,
-  Uint8List customPath,
+  Uint8List path,
   int pathLen, {
   int type = 1, // ADV_TYPE_CHAT
   int flags = 0,
   String name = '',
+  double? lat,
+  double? lon,
+  DateTime? lastModified,
 }) {
   final writer = BufferWriter();
   writer.writeByte(cmdAddUpdateContact);
@@ -692,17 +708,7 @@ Uint8List buildUpdateContactPathFrame(
   writer.writeByte(flags);
   writer.writeByte(pathLen);
 
-  // Path data (64 bytes, zero-padded)
+  writer.writeBytesPadded(path, maxPathSize);
-  final pathPadded = Uint8List(maxPathSize);
-  if (customPath.isNotEmpty && pathLen > 0) {
-    final copyLen = customPath.length < maxPathSize
-        ? customPath.length
-        : maxPathSize;
-    for (int i = 0; i < copyLen; i++) {
-      pathPadded[i] = customPath[i];
-    }
-  }
-  writer.writeBytes(pathPadded);
 
   // Name (32 bytes, null-padded)
   writer.writeCString(name, maxNameSize);
@@ -711,6 +717,27 @@ Uint8List buildUpdateContactPathFrame(
   final timestamp = DateTime.now().millisecondsSinceEpoch ~/ 1000;
   writer.writeUInt32LE(timestamp);
 
+  if ((lat == null || lon == null) && lastModified != null) {
+    // If lat/lon not provided, write zeros
+    writer.writeInt32LE(0);
+    writer.writeInt32LE(0);
+  } else {
+    // Latitude and Longitude are expected in degrees, convert to int by multiplying by 1e6
+    // Latitude
+    final latitude = lat ?? 0.0;
+    writer.writeInt32LE((latitude * 1e6).round());
+
+    // Longitude
+    final longitude = lon ?? 0.0;
+    writer.writeInt32LE((longitude * 1e6).round());
+  }
+
+  if (lastModified != null) {
+    // Last modified
+    final lastModifiedTimestamp = lastModified.millisecondsSinceEpoch ~/ 1000;
+    writer.writeUInt32LE(lastModifiedTimestamp);
+  }
+
   return writer.toBytes();
 }
 

lib/l10n/app_bg.arb

@@ -1859,5 +1859,34 @@
   "usbConnectionFailed": "Неуспешно свързване през USB: {error}",
   "usbStatus_notConnected": "Изберете USB устройство",
   "usbStatus_searching": "Търсене на USB устройства...",
-  "usbErrorConnectTimedOut": "Връзката прекъсна. Уверете се, че устройството има софтуер за USB връзка."
+  "usbErrorConnectTimedOut": "Връзката прекъсна. Уверете се, че устройството има софтуер за USB връзка.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostHint": "192.168.40.10",
+  "tcpScreenTitle": "Свържете се чрез TCP",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpHostLabel": "IP адрес",
+  "tcpPortLabel": "Пристанище",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Въведете крайната точка и свържете се.",
+  "tcpStatus_connectingTo": "Свързване към {endpoint}...",
+  "tcpErrorHostRequired": "Необходим е IP адрес.",
+  "tcpErrorPortInvalid": "Портът трябва да бъде между 1 и 65535.",
+  "tcpErrorUnsupported": "Транспортът чрез TCP не се поддържа на тази платформа.",
+  "tcpErrorTimedOut": "Връзката TCP изтекла.",
+  "tcpConnectionFailed": "Неуспешно е установено TCP връзката: {error}",
+  "map_showDiscoveryContacts": "Покажи контакти за откриване",
+  "map_setAsMyLocation": "Задайте като моя местоположение"
 }

lib/l10n/app_de.arb

@@ -1887,5 +1887,34 @@
   "usbStatus_notConnected": "Wählen Sie ein USB-Gerät aus",
   "usbStatus_connecting": "Verbindung zum USB-Gerät...",
   "usbConnectionFailed": "Fehler beim USB-Verbindungsaufbau: {error}",
-  "usbErrorConnectTimedOut": "Verbindung konnte nicht hergestellt werden. Stellen Sie sicher, dass das Gerät die entsprechende USB-Firmware enthält."
+  "usbErrorConnectTimedOut": "Verbindung konnte nicht hergestellt werden. Stellen Sie sicher, dass das Gerät die entsprechende USB-Firmware enthält.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostLabel": "IP-Adresse",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpHostHint": "192.168.40.10",
+  "tcpScreenTitle": "Verbinden über TCP",
+  "tcpPortLabel": "Port",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Geben Sie den Endpunkt ein und verbinden Sie sich.",
+  "tcpStatus_connectingTo": "Verbindung zu {endpoint}...",
+  "tcpErrorHostRequired": "Eine IP-Adresse ist erforderlich.",
+  "tcpErrorPortInvalid": "Die Portnummer muss zwischen 1 und 65535 liegen.",
+  "tcpErrorUnsupported": "Die TCP-Übertragung wird auf dieser Plattform nicht unterstützt.",
+  "tcpErrorTimedOut": "Die TCP-Verbindung ist abgelaufen.",
+  "tcpConnectionFailed": "Fehler beim TCP-Verbindungsaufbau: {error}",
+  "map_showDiscoveryContacts": "Entdeckungs-Kontakte anzeigen",
+  "map_setAsMyLocation": "Als meine aktuelle Position festlegen"
 }

lib/l10n/app_en.arb

@@ -49,6 +49,33 @@
   "scanner_title": "MeshCore Open",
   "connectionChoiceUsbLabel": "USB",
   "connectionChoiceBluetoothLabel": "Bluetooth",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpScreenTitle": "Connect over TCP",
+  "tcpHostLabel": "IP Address",
+  "tcpHostHint": "192.168.40.10",
+  "tcpPortLabel": "Port",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Enter endpoint and connect",
+  "tcpStatus_connectingTo": "Connecting to {endpoint}...",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpErrorHostRequired": "IP address is required.",
+  "tcpErrorPortInvalid": "Port must be between 1 and 65535.",
+  "tcpErrorUnsupported": "TCP transport is not supported on this platform.",
+  "tcpErrorTimedOut": "TCP connection timed out.",
+  "tcpConnectionFailed": "TCP connection failed: {error}",
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
   "usbScreenTitle": "Connect over USB",
   "usbScreenSubtitle": "Choose a detected serial device and connect directly to your MeshCore node.",
   "usbScreenStatus": "Select a USB device",
@@ -780,6 +807,7 @@
   "map_source": "Source",
   "map_flags": "Flags",
   "map_shareMarkerHere": "Share marker here",
+  "map_setAsMyLocation": "Set as my location",
   "map_pinLabel": "Pin label",
   "map_label": "Label",
   "map_pointOfInterest": "Point of interest",
@@ -807,6 +835,7 @@
   "map_markers": "Markers",
   "map_showSharedMarkers": "Show shared markers",
   "map_showGuessedLocations": "Show guessed node locations",
+  "map_showDiscoveryContacts": "Show Discovery Contacts",
   "map_guessedLocation": "Guessed location",
   "map_lastSeenTime": "Last Seen Time",
   "map_sharedPin": "Shared pin",
@@ -1898,4 +1927,4 @@
   "discoveredContacts_deleteContact": "Delete Discovered Contact",
   "discoveredContacts_deleteContactAll": "Delete All Discovered Contacts",
   "discoveredContacts_deleteContactAllContent": "Are you sure you want to delete all discovered contacts?"
-}
+}

lib/l10n/app_es.arb

@@ -1887,5 +1887,34 @@
   "usbStatus_searching": "Buscando dispositivos USB...",
   "usbStatus_notConnected": "Seleccione un dispositivo USB",
   "usbConnectionFailed": "Error al conectar mediante USB: {error}",
-  "usbErrorConnectTimedOut": "La conexión ha caducado. Asegúrese de que el dispositivo tenga el firmware USB Companion."
+  "usbErrorConnectTimedOut": "La conexión ha caducado. Asegúrese de que el dispositivo tenga el firmware USB Companion.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpScreenTitle": "Establecer conexión a través de TCP",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpHostHint": "192.168.40.10",
+  "tcpHostLabel": "Dirección IP",
+  "tcpPortLabel": "Puerto",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Ingrese la dirección final y conecte.",
+  "tcpStatus_connectingTo": "Conectándose a {endpoint}...",
+  "tcpErrorHostRequired": "Se requiere la dirección IP.",
+  "tcpErrorPortInvalid": "El puerto debe estar entre 1 y 65535.",
+  "tcpErrorUnsupported": "El protocolo de transporte TCP no está soportado en esta plataforma.",
+  "tcpErrorTimedOut": "La conexión TCP ha caducado.",
+  "tcpConnectionFailed": "Error en la conexión TCP: {error}",
+  "map_showDiscoveryContacts": "Mostrar Contactos de Descubrimiento",
+  "map_setAsMyLocation": "Establecer mi ubicación"
 }

lib/l10n/app_fr.arb

@@ -1859,5 +1859,34 @@
   "usbConnectionFailed": "Échec de la connexion USB : {error}",
   "usbStatus_connecting": "Connexion au périphérique USB...",
   "usbStatus_searching": "Recherche de périphériques USB...",
-  "usbErrorConnectTimedOut": "La connexion a expiré. Assurez-vous que l'appareil dispose du firmware USB Companion."
+  "usbErrorConnectTimedOut": "La connexion a expiré. Assurez-vous que l'appareil dispose du firmware USB Companion.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostLabel": "Adresse IP",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpScreenTitle": "Établir une connexion via TCP",
+  "tcpHostHint": "192.168.40.10",
+  "tcpPortLabel": "Port",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Entrez l'adresse de destination et connectez-vous.",
+  "tcpStatus_connectingTo": "Connexion à {endpoint}...",
+  "tcpErrorHostRequired": "Une adresse IP est obligatoire.",
+  "tcpErrorPortInvalid": "La taille du port doit être comprise entre 1 et 65535.",
+  "tcpErrorUnsupported": "Le protocole TCP n'est pas pris en charge sur cette plateforme.",
+  "tcpErrorTimedOut": "La connexion TCP a expiré.",
+  "tcpConnectionFailed": "Échec de la connexion TCP : {error}",
+  "map_showDiscoveryContacts": "Afficher les contacts de découverte",
+  "map_setAsMyLocation": "Définir comme ma localisation"
 }

lib/l10n/app_it.arb

@@ -1859,5 +1859,34 @@
   "usbConnectionFailed": "Errore nella connessione USB: {error}",
   "usbStatus_notConnected": "Seleziona un dispositivo USB",
   "usbStatus_connecting": "Connessione al dispositivo USB...",
-  "usbErrorConnectTimedOut": "La connessione è scaduta. Assicurarsi che il dispositivo abbia il firmware USB Companion."
+  "usbErrorConnectTimedOut": "La connessione è scaduta. Assicurarsi che il dispositivo abbia il firmware USB Companion.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostLabel": "Indirizzo IP",
+  "tcpHostHint": "192.168.40.10",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpScreenTitle": "Stabilire una connessione tramite TCP",
+  "tcpPortLabel": "Porta",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Inserisci l'endpoint e connettiti.",
+  "tcpStatus_connectingTo": "Connessione a {endpoint}...",
+  "tcpErrorHostRequired": "È necessario fornire un indirizzo IP.",
+  "tcpErrorPortInvalid": "La dimensione della porta deve essere compresa tra 1 e 65535.",
+  "tcpErrorUnsupported": "Il protocollo TCP non è supportato su questa piattaforma.",
+  "tcpErrorTimedOut": "La connessione TCP è scaduta.",
+  "tcpConnectionFailed": "Impossibile stabilire la connessione TCP: {error}",
+  "map_showDiscoveryContacts": "Mostra Contatti di Discovery",
+  "map_setAsMyLocation": "Imposta come la mia posizione"
 }

lib/l10n/app_localizations.dart

@@ -334,6 +334,84 @@ abstract class AppLocalizations {
   /// **'Bluetooth'**
   String get connectionChoiceBluetoothLabel;
 
+  /// No description provided for @connectionChoiceTcpLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'TCP'**
+  String get connectionChoiceTcpLabel;
+
+  /// No description provided for @tcpScreenTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Connect over TCP'**
+  String get tcpScreenTitle;
+
+  /// No description provided for @tcpHostLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'IP Address'**
+  String get tcpHostLabel;
+
+  /// No description provided for @tcpHostHint.
+  ///
+  /// In en, this message translates to:
+  /// **'192.168.40.10'**
+  String get tcpHostHint;
+
+  /// No description provided for @tcpPortLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Port'**
+  String get tcpPortLabel;
+
+  /// No description provided for @tcpPortHint.
+  ///
+  /// In en, this message translates to:
+  /// **'5000'**
+  String get tcpPortHint;
+
+  /// No description provided for @tcpStatus_notConnected.
+  ///
+  /// In en, this message translates to:
+  /// **'Enter endpoint and connect'**
+  String get tcpStatus_notConnected;
+
+  /// No description provided for @tcpStatus_connectingTo.
+  ///
+  /// In en, this message translates to:
+  /// **'Connecting to {endpoint}...'**
+  String tcpStatus_connectingTo(String endpoint);
+
+  /// No description provided for @tcpErrorHostRequired.
+  ///
+  /// In en, this message translates to:
+  /// **'IP address is required.'**
+  String get tcpErrorHostRequired;
+
+  /// No description provided for @tcpErrorPortInvalid.
+  ///
+  /// In en, this message translates to:
+  /// **'Port must be between 1 and 65535.'**
+  String get tcpErrorPortInvalid;
+
+  /// No description provided for @tcpErrorUnsupported.
+  ///
+  /// In en, this message translates to:
+  /// **'TCP transport is not supported on this platform.'**
+  String get tcpErrorUnsupported;
+
+  /// No description provided for @tcpErrorTimedOut.
+  ///
+  /// In en, this message translates to:
+  /// **'TCP connection timed out.'**
+  String get tcpErrorTimedOut;
+
+  /// No description provided for @tcpConnectionFailed.
+  ///
+  /// In en, this message translates to:
+  /// **'TCP connection failed: {error}'**
+  String tcpConnectionFailed(String error);
+
   /// No description provided for @usbScreenTitle.
   ///
   /// In en, this message translates to:
@@ -2668,6 +2746,12 @@ abstract class AppLocalizations {
   /// **'Share marker here'**
   String get map_shareMarkerHere;
 
+  /// No description provided for @map_setAsMyLocation.
+  ///
+  /// In en, this message translates to:
+  /// **'Set as my location'**
+  String get map_setAsMyLocation;
+
   /// No description provided for @map_pinLabel.
   ///
   /// In en, this message translates to:
@@ -2788,6 +2872,12 @@ abstract class AppLocalizations {
   /// **'Show guessed node locations'**
   String get map_showGuessedLocations;
 
+  /// No description provided for @map_showDiscoveryContacts.
+  ///
+  /// In en, this message translates to:
+  /// **'Show Discovery Contacts'**
+  String get map_showDiscoveryContacts;
+
   /// No description provided for @map_guessedLocation.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_bg.dart

@@ -117,6 +117,50 @@ class AppLocalizationsBg extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Свържете се чрез TCP';
+
+  @override
+  String get tcpHostLabel => 'IP адрес';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Пристанище';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Въведете крайната точка и свържете се.';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Свързване към $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Необходим е IP адрес.';
+
+  @override
+  String get tcpErrorPortInvalid => 'Портът трябва да бъде между 1 и 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Транспортът чрез TCP не се поддържа на тази платформа.';
+
+  @override
+  String get tcpErrorTimedOut => 'Връзката TCP изтекла.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Неуспешно е установено TCP връзката: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Свържете се чрез USB';
 
@@ -1467,6 +1511,9 @@ class AppLocalizationsBg extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Споделете маркер тук';
 
+  @override
+  String get map_setAsMyLocation => 'Задайте като моя местоположение';
+
   @override
   String get map_pinLabel => 'Етикетиране на пин';
 
@@ -1531,6 +1578,9 @@ class AppLocalizationsBg extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Покажете местоположенията на предположените възли.';
 
+  @override
+  String get map_showDiscoveryContacts => 'Покажи контакти за откриване';
+
   @override
   String get map_guessedLocation => 'Предполагано местоположение';
 

lib/l10n/app_localizations_de.dart

@@ -117,6 +117,52 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Verbinden über TCP';
+
+  @override
+  String get tcpHostLabel => 'IP-Adresse';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Port';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected =>
+      'Geben Sie den Endpunkt ein und verbinden Sie sich.';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Verbindung zu $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Eine IP-Adresse ist erforderlich.';
+
+  @override
+  String get tcpErrorPortInvalid =>
+      'Die Portnummer muss zwischen 1 und 65535 liegen.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Die TCP-Übertragung wird auf dieser Plattform nicht unterstützt.';
+
+  @override
+  String get tcpErrorTimedOut => 'Die TCP-Verbindung ist abgelaufen.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Fehler beim TCP-Verbindungsaufbau: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Verbinden über USB';
 
@@ -1467,6 +1513,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Teilen Sie den Marker hier.';
 
+  @override
+  String get map_setAsMyLocation => 'Als meine aktuelle Position festlegen';
+
   @override
   String get map_pinLabel => 'Pin Name';
 
@@ -1531,6 +1580,9 @@ class AppLocalizationsDe extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Zeige die vermuteten Knotenpositionen';
 
+  @override
+  String get map_showDiscoveryContacts => 'Entdeckungs-Kontakte anzeigen';
+
   @override
   String get map_guessedLocation => 'Geschätzter Ort';
 

lib/l10n/app_localizations_en.dart

@@ -117,6 +117,50 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Connect over TCP';
+
+  @override
+  String get tcpHostLabel => 'IP Address';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Port';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Enter endpoint and connect';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Connecting to $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'IP address is required.';
+
+  @override
+  String get tcpErrorPortInvalid => 'Port must be between 1 and 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'TCP transport is not supported on this platform.';
+
+  @override
+  String get tcpErrorTimedOut => 'TCP connection timed out.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'TCP connection failed: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Connect over USB';
 
@@ -1443,6 +1487,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Share marker here';
 
+  @override
+  String get map_setAsMyLocation => 'Set as my location';
+
   @override
   String get map_pinLabel => 'Pin label';
 
@@ -1506,6 +1553,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get map_showGuessedLocations => 'Show guessed node locations';
 
+  @override
+  String get map_showDiscoveryContacts => 'Show Discovery Contacts';
+
   @override
   String get map_guessedLocation => 'Guessed location';
 

lib/l10n/app_localizations_es.dart

@@ -117,6 +117,50 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Establecer conexión a través de TCP';
+
+  @override
+  String get tcpHostLabel => 'Dirección IP';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Puerto';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Ingrese la dirección final y conecte.';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Conectándose a $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Se requiere la dirección IP.';
+
+  @override
+  String get tcpErrorPortInvalid => 'El puerto debe estar entre 1 y 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'El protocolo de transporte TCP no está soportado en esta plataforma.';
+
+  @override
+  String get tcpErrorTimedOut => 'La conexión TCP ha caducado.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Error en la conexión TCP: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Conecte mediante USB';
 
@@ -1465,6 +1509,9 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Compartir marcador aquí';
 
+  @override
+  String get map_setAsMyLocation => 'Establecer mi ubicación';
+
   @override
   String get map_pinLabel => 'Etiqueta de marcador';
 
@@ -1529,6 +1576,9 @@ class AppLocalizationsEs extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Mostrar las ubicaciones estimadas de los nodos.';
 
+  @override
+  String get map_showDiscoveryContacts => 'Mostrar Contactos de Descubrimiento';
+
   @override
   String get map_guessedLocation => 'Ubicación estimada';
 

lib/l10n/app_localizations_fr.dart

@@ -117,6 +117,52 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Établir une connexion via TCP';
+
+  @override
+  String get tcpHostLabel => 'Adresse IP';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Port';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected =>
+      'Entrez l\'adresse de destination et connectez-vous.';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Connexion à $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Une adresse IP est obligatoire.';
+
+  @override
+  String get tcpErrorPortInvalid =>
+      'La taille du port doit être comprise entre 1 et 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Le protocole TCP n\'est pas pris en charge sur cette plateforme.';
+
+  @override
+  String get tcpErrorTimedOut => 'La connexion TCP a expiré.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Échec de la connexion TCP : $error';
+  }
+
   @override
   String get usbScreenTitle => 'Connectez via USB';
 
@@ -1472,6 +1518,9 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Partager le marqueur ici';
 
+  @override
+  String get map_setAsMyLocation => 'Définir comme ma localisation';
+
   @override
   String get map_pinLabel => 'Étiquete de repin';
 
@@ -1536,6 +1585,9 @@ class AppLocalizationsFr extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Afficher les emplacements des nœuds estimés';
 
+  @override
+  String get map_showDiscoveryContacts => 'Afficher les contacts de découverte';
+
   @override
   String get map_guessedLocation => 'Lieu deviné';
 

lib/l10n/app_localizations_it.dart

@@ -117,6 +117,51 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Stabilire una connessione tramite TCP';
+
+  @override
+  String get tcpHostLabel => 'Indirizzo IP';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Porta';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Inserisci l\'endpoint e connettiti.';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Connessione a $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'È necessario fornire un indirizzo IP.';
+
+  @override
+  String get tcpErrorPortInvalid =>
+      'La dimensione della porta deve essere compresa tra 1 e 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Il protocollo TCP non è supportato su questa piattaforma.';
+
+  @override
+  String get tcpErrorTimedOut => 'La connessione TCP è scaduta.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Impossibile stabilire la connessione TCP: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Connessione tramite USB';
 
@@ -1465,6 +1510,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Condividi marcatore qui';
 
+  @override
+  String get map_setAsMyLocation => 'Imposta come la mia posizione';
+
   @override
   String get map_pinLabel => 'Etichetta PIN';
 
@@ -1528,6 +1576,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get map_showGuessedLocations => 'Mostra le posizioni stimate dei nodi';
 
+  @override
+  String get map_showDiscoveryContacts => 'Mostra Contatti di Discovery';
+
   @override
   String get map_guessedLocation => 'Località indovinata';
 

lib/l10n/app_localizations_nl.dart

@@ -117,6 +117,51 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Verbind via TCP';
+
+  @override
+  String get tcpHostLabel => 'IP-adres';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Poort';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Voer het eindpunt in en verbind';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Verbinding maken met $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Een IP-adres is vereist.';
+
+  @override
+  String get tcpErrorPortInvalid =>
+      'De poortwaarde moet tussen 1 en 65535 liggen.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'TCP-transport wordt niet ondersteund op deze platform.';
+
+  @override
+  String get tcpErrorTimedOut => 'De TCP-verbinding is verlopen.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Verbinding met TCP mislukt: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Verbind via USB';
 
@@ -1457,6 +1502,9 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Deel marker hier';
 
+  @override
+  String get map_setAsMyLocation => 'Stel dit in als mijn locatie';
+
   @override
   String get map_pinLabel => 'Label vastzetten';
 
@@ -1521,6 +1569,9 @@ class AppLocalizationsNl extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Toon de voorspelde locaties van de knopen';
 
+  @override
+  String get map_showDiscoveryContacts => 'Ontdek contacten weergeven';
+
   @override
   String get map_guessedLocation => 'Geroerde locatie';
 

lib/l10n/app_localizations_pl.dart

@@ -117,6 +117,52 @@ class AppLocalizationsPl extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Połącz się za pomocą protokołu TCP';
+
+  @override
+  String get tcpHostLabel => 'Adres IP';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Port';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Wprowadź adres URL i połącz';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Połączenie z $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Wymagana jest adresa IP.';
+
+  @override
+  String get tcpErrorPortInvalid =>
+      'Numer portu musi mieścić się w zakresie od 1 do 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Transport protokoł TCP nie jest obsługiwany na tym urządzeniu.';
+
+  @override
+  String get tcpErrorTimedOut =>
+      'Połączenie TCP zakończyło się bez powodzenia.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Błąd połączenia TCP: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Połącz przez USB';
 
@@ -1466,6 +1512,9 @@ class AppLocalizationsPl extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Udostępnij znacznik tutaj';
 
+  @override
+  String get map_setAsMyLocation => 'Ustaw jako moje lokalizację';
+
   @override
   String get map_pinLabel => 'Oznacz etykietę';
 
@@ -1530,6 +1579,9 @@ class AppLocalizationsPl extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Wyświetl lokalizacje zgadanych węzłów';
 
+  @override
+  String get map_showDiscoveryContacts => 'Pokaż kontakty odkrywania';
+
   @override
   String get map_guessedLocation => 'Wydana lokalizacja';
 

lib/l10n/app_localizations_pt.dart

@@ -117,6 +117,51 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Estabelecer conexão via TCP';
+
+  @override
+  String get tcpHostLabel => 'Endereço IP';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Porta';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Insira o endereço final e conecte-se.';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Conectando a $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'É necessário fornecer um endereço IP.';
+
+  @override
+  String get tcpErrorPortInvalid =>
+      'O valor do porto deve estar entre 1 e 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'O protocolo TCP não é suportado nesta plataforma.';
+
+  @override
+  String get tcpErrorTimedOut => 'A conexão TCP expirou.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Falha na conexão TCP: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Conecte via USB';
 
@@ -1466,6 +1511,9 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Compartilhar marcador aqui';
 
+  @override
+  String get map_setAsMyLocation => 'Defina minha localização';
+
   @override
   String get map_pinLabel => 'Rótulo de marcador';
 
@@ -1530,6 +1578,9 @@ class AppLocalizationsPt extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Mostrar as localizações dos nós estimados';
 
+  @override
+  String get map_showDiscoveryContacts => 'Mostrar Contatos de Descoberta';
+
   @override
   String get map_guessedLocation => 'Localização estimada';
 

lib/l10n/app_localizations_ru.dart

@@ -117,6 +117,51 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Установить соединение по протоколу TCP';
+
+  @override
+  String get tcpHostLabel => 'IP-адрес';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Порт';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Введите адрес и подключитесь.';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Подключение к $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Необходимо указать IP-адрес.';
+
+  @override
+  String get tcpErrorPortInvalid =>
+      'Порт должен находиться в диапазоне от 1 до 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Протокол TCP не поддерживается на этой платформе.';
+
+  @override
+  String get tcpErrorTimedOut => 'Соединение TCP не удалось установить.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Не удалось установить соединение TCP: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Подключение через USB';
 
@@ -1468,6 +1513,9 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Поделиться меткой здесь';
 
+  @override
+  String get map_setAsMyLocation => 'Установить мое местоположение';
+
   @override
   String get map_pinLabel => 'Метка';
 
@@ -1532,6 +1580,9 @@ class AppLocalizationsRu extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Отобразить предполагаемые места расположения узлов';
 
+  @override
+  String get map_showDiscoveryContacts => 'Показать контакты Discovery';
+
   @override
   String get map_guessedLocation => 'Угаданное место';
 

lib/l10n/app_localizations_sk.dart

@@ -117,6 +117,50 @@ class AppLocalizationsSk extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Spojte sa pomocou protokolu TCP';
+
+  @override
+  String get tcpHostLabel => 'IP adresa';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Port';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Zadajte cieľovú adresu a pripojte sa.';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Pripojenie k $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Je potrebné zadať IP adresu.';
+
+  @override
+  String get tcpErrorPortInvalid => 'Číslo portu musí byť medzi 1 a 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Prevoz prostredníctvom protokolu TCP nie je na tejto platforme podporovaný.';
+
+  @override
+  String get tcpErrorTimedOut => 'Pripojenie TCP vypršalo.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Neúspešné vytvorenie TCP spojenia: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Pripojte cez USB';
 
@@ -1460,6 +1504,9 @@ class AppLocalizationsSk extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Zdieľte značku tu';
 
+  @override
+  String get map_setAsMyLocation => 'Nastavte ako moju polohu';
+
   @override
   String get map_pinLabel => 'Označka upozornenia';
 
@@ -1524,6 +1571,9 @@ class AppLocalizationsSk extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Zobraziť umiestnenia odhadnutých uzlov';
 
+  @override
+  String get map_showDiscoveryContacts => 'Zobraziť kontakty objavov';
+
   @override
   String get map_guessedLocation => 'Odhadnutá lokalita';
 

lib/l10n/app_localizations_sl.dart

@@ -117,6 +117,50 @@ class AppLocalizationsSl extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Komunicirajte preko protokola TCP';
+
+  @override
+  String get tcpHostLabel => 'IP naslov';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Vrata';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Vnesite končni naslov in se povežite';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Povezava z $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Potrebna je IP-naslov.';
+
+  @override
+  String get tcpErrorPortInvalid => 'Port mora biti med 1 in 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Transport preko protokola TCP ni podprt na tej platformi.';
+
+  @override
+  String get tcpErrorTimedOut => 'Povezava TCP je presegla časovno obdobje.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Napaka pri povezavi TCP: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Povežite preko USB';
 
@@ -1454,6 +1498,9 @@ class AppLocalizationsSl extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Delite točke tukaj.';
 
+  @override
+  String get map_setAsMyLocation => 'Nastavite to kot mojo lokacijo';
+
   @override
   String get map_pinLabel => 'Oznaka za pritrditev';
 
@@ -1517,6 +1564,9 @@ class AppLocalizationsSl extends AppLocalizations {
   @override
   String get map_showGuessedLocations => 'Pokaži lokacije domnevnih not.';
 
+  @override
+  String get map_showDiscoveryContacts => 'Prikaži odkritja kontaktov';
+
   @override
   String get map_guessedLocation => 'Predpostavljena lokacija';
 

lib/l10n/app_localizations_sv.dart

@@ -117,6 +117,50 @@ class AppLocalizationsSv extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'Anslut via TCP';
+
+  @override
+  String get tcpHostLabel => 'IP-adress';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Port';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Ange slutpunkt och anslut';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Anslutning till $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'IP-adress krävs.';
+
+  @override
+  String get tcpErrorPortInvalid => 'Porten måste vara mellan 1 och 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'TCP-transport fungerar inte på denna plattform.';
+
+  @override
+  String get tcpErrorTimedOut => 'TCP-anslutningen har tidsut gått.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Fel vid TCP-anslutning: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Anslut via USB';
 
@@ -1450,6 +1494,9 @@ class AppLocalizationsSv extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Dela markeringen här';
 
+  @override
+  String get map_setAsMyLocation => 'Ange som min plats';
+
   @override
   String get map_pinLabel => 'Fästetikett';
 
@@ -1514,6 +1561,9 @@ class AppLocalizationsSv extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Visa upp de antagna nodernas placeringar';
 
+  @override
+  String get map_showDiscoveryContacts => 'Visa Discovery-kontakter';
+
   @override
   String get map_guessedLocation => 'Gissad plats';
 

lib/l10n/app_localizations_uk.dart

@@ -117,6 +117,51 @@ class AppLocalizationsUk extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => 'Bluetooth';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => 'З\'єднатися через протокол TCP';
+
+  @override
+  String get tcpHostLabel => 'IP-адреса';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => 'Порт';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => 'Введіть кінцеву точку та підключіться';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return 'Підключення до $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => 'Необхідно вказати IP-адресу.';
+
+  @override
+  String get tcpErrorPortInvalid => 'Порт повинен бути в межах від 1 до 65535.';
+
+  @override
+  String get tcpErrorUnsupported =>
+      'Транспорт TCP не підтримується на цій платформі.';
+
+  @override
+  String get tcpErrorTimedOut =>
+      'З\'єднання TCP завершилося через закінчення часу очікування.';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'Не вдалося встановити з\'єднання TCP: $error';
+  }
+
   @override
   String get usbScreenTitle => 'Підключити через USB';
 
@@ -1465,6 +1510,9 @@ class AppLocalizationsUk extends AppLocalizations {
   @override
   String get map_shareMarkerHere => 'Поділитися маркером тут';
 
+  @override
+  String get map_setAsMyLocation => 'Встановити моє місцезнаходження';
+
   @override
   String get map_pinLabel => 'Мітка піна';
 
@@ -1529,6 +1577,9 @@ class AppLocalizationsUk extends AppLocalizations {
   String get map_showGuessedLocations =>
       'Показати місцезнаходження передбачених вузлів';
 
+  @override
+  String get map_showDiscoveryContacts => 'Показати контакти Відкриття';
+
   @override
   String get map_guessedLocation => 'Визначено місцезнаходження';
 

lib/l10n/app_localizations_zh.dart

@@ -117,6 +117,49 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get connectionChoiceBluetoothLabel => '蓝牙';
 
+  @override
+  String get connectionChoiceTcpLabel => 'TCP';
+
+  @override
+  String get tcpScreenTitle => '通过 TCP 连接';
+
+  @override
+  String get tcpHostLabel => 'IP地址';
+
+  @override
+  String get tcpHostHint => '192.168.40.10';
+
+  @override
+  String get tcpPortLabel => '端口';
+
+  @override
+  String get tcpPortHint => '5000';
+
+  @override
+  String get tcpStatus_notConnected => '输入目标地址，然后连接';
+
+  @override
+  String tcpStatus_connectingTo(String endpoint) {
+    return '连接到 $endpoint...';
+  }
+
+  @override
+  String get tcpErrorHostRequired => '需要提供IP地址。';
+
+  @override
+  String get tcpErrorPortInvalid => '端口号必须在 1 到 65535 之间。';
+
+  @override
+  String get tcpErrorUnsupported => '此平台不支持 TCP 传输。';
+
+  @override
+  String get tcpErrorTimedOut => 'TCP 连接超时。';
+
+  @override
+  String tcpConnectionFailed(String error) {
+    return 'TCP 连接失败：$error';
+  }
+
   @override
   String get usbScreenTitle => '通过USB连接';
 
@@ -1378,6 +1421,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get map_shareMarkerHere => '在此分享标记';
 
+  @override
+  String get map_setAsMyLocation => '设置为我的位置';
+
   @override
   String get map_pinLabel => '标签';
 
@@ -1440,6 +1486,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get map_showGuessedLocations => '显示猜测的节点位置';
 
+  @override
+  String get map_showDiscoveryContacts => '显示发现联系人';
+
   @override
   String get map_guessedLocation => '猜测的位置';
 

lib/l10n/app_nl.arb

@@ -1859,5 +1859,34 @@
   "usbStatus_notConnected": "Selecteer een USB-apparaat",
   "usbStatus_connecting": "Verbinding maken met USB-apparaat...",
   "usbStatus_searching": "Zoeken naar USB-apparaten...",
-  "usbErrorConnectTimedOut": "Verbinding is verbroken. Zorg ervoor dat het apparaat de juiste USB-firmware heeft."
+  "usbErrorConnectTimedOut": "Verbinding is verbroken. Zorg ervoor dat het apparaat de juiste USB-firmware heeft.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpScreenTitle": "Verbind via TCP",
+  "tcpHostLabel": "IP-adres",
+  "tcpHostHint": "192.168.40.10",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpPortLabel": "Poort",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Voer het eindpunt in en verbind",
+  "tcpStatus_connectingTo": "Verbinding maken met {endpoint}...",
+  "tcpErrorHostRequired": "Een IP-adres is vereist.",
+  "tcpErrorPortInvalid": "De poortwaarde moet tussen 1 en 65535 liggen.",
+  "tcpErrorUnsupported": "TCP-transport wordt niet ondersteund op deze platform.",
+  "tcpErrorTimedOut": "De TCP-verbinding is verlopen.",
+  "tcpConnectionFailed": "Verbinding met TCP mislukt: {error}",
+  "map_showDiscoveryContacts": "Ontdek contacten weergeven",
+  "map_setAsMyLocation": "Stel dit in als mijn locatie"
 }

lib/l10n/app_pl.arb

@@ -1859,5 +1859,34 @@
   "usbStatus_connecting": "Połączenie z urządzeniem USB...",
   "usbStatus_notConnected": "Wybierz urządzenie USB",
   "usbConnectionFailed": "Błąd połączenia USB: {error}",
-  "usbErrorConnectTimedOut": "Połączenie nie zostało nawiązane. Upewnij się, że urządzenie posiada oprogramowanie \"USB Companion\"."
+  "usbErrorConnectTimedOut": "Połączenie nie zostało nawiązane. Upewnij się, że urządzenie posiada oprogramowanie \"USB Companion\".",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpHostHint": "192.168.40.10",
+  "tcpScreenTitle": "Połącz się za pomocą protokołu TCP",
+  "tcpHostLabel": "Adres IP",
+  "tcpPortLabel": "Port",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Wprowadź adres URL i połącz",
+  "tcpStatus_connectingTo": "Połączenie z {endpoint}...",
+  "tcpErrorHostRequired": "Wymagana jest adresa IP.",
+  "tcpErrorPortInvalid": "Numer portu musi mieścić się w zakresie od 1 do 65535.",
+  "tcpErrorUnsupported": "Transport protokoł TCP nie jest obsługiwany na tym urządzeniu.",
+  "tcpErrorTimedOut": "Połączenie TCP zakończyło się bez powodzenia.",
+  "tcpConnectionFailed": "Błąd połączenia TCP: {error}",
+  "map_showDiscoveryContacts": "Pokaż kontakty odkrywania",
+  "map_setAsMyLocation": "Ustaw jako moje lokalizację"
 }

lib/l10n/app_pt.arb

@@ -1859,5 +1859,34 @@
   "usbStatus_notConnected": "Selecione um dispositivo USB",
   "usbConnectionFailed": "Falha na conexão USB: {error}",
   "usbStatus_connecting": "Conectando ao dispositivo USB...",
-  "usbErrorConnectTimedOut": "A conexão expirou. Verifique se o dispositivo possui o firmware USB Companion."
+  "usbErrorConnectTimedOut": "A conexão expirou. Verifique se o dispositivo possui o firmware USB Companion.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostLabel": "Endereço IP",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpScreenTitle": "Estabelecer conexão via TCP",
+  "tcpHostHint": "192.168.40.10",
+  "tcpPortLabel": "Porta",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Insira o endereço final e conecte-se.",
+  "tcpStatus_connectingTo": "Conectando a {endpoint}...",
+  "tcpErrorHostRequired": "É necessário fornecer um endereço IP.",
+  "tcpErrorPortInvalid": "O valor do porto deve estar entre 1 e 65535.",
+  "tcpErrorUnsupported": "O protocolo TCP não é suportado nesta plataforma.",
+  "tcpErrorTimedOut": "A conexão TCP expirou.",
+  "tcpConnectionFailed": "Falha na conexão TCP: {error}",
+  "map_showDiscoveryContacts": "Mostrar Contatos de Descoberta",
+  "map_setAsMyLocation": "Defina minha localização"
 }

lib/l10n/app_ru.arb

@@ -1099,5 +1099,34 @@
   "usbStatus_connecting": "Подключение к USB-устройству...",
   "usbConnectionFailed": "Не удалось установить соединение через USB: {error}",
   "usbStatus_notConnected": "Выберите USB-устройство",
-  "usbErrorConnectTimedOut": "Соединение не установлено. Убедитесь, что устройство имеет установленное программное обеспечение USB Companion."
+  "usbErrorConnectTimedOut": "Соединение не установлено. Убедитесь, что устройство имеет установленное программное обеспечение USB Companion.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostHint": "192.168.40.10",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpHostLabel": "IP-адрес",
+  "tcpScreenTitle": "Установить соединение по протоколу TCP",
+  "tcpPortLabel": "Порт",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Введите адрес и подключитесь.",
+  "tcpStatus_connectingTo": "Подключение к {endpoint}...",
+  "tcpErrorHostRequired": "Необходимо указать IP-адрес.",
+  "tcpErrorPortInvalid": "Порт должен находиться в диапазоне от 1 до 65535.",
+  "tcpErrorUnsupported": "Протокол TCP не поддерживается на этой платформе.",
+  "tcpErrorTimedOut": "Соединение TCP не удалось установить.",
+  "tcpConnectionFailed": "Не удалось установить соединение TCP: {error}",
+  "map_showDiscoveryContacts": "Показать контакты Discovery",
+  "map_setAsMyLocation": "Установить мое местоположение"
 }

lib/l10n/app_sk.arb

@@ -1859,5 +1859,34 @@
   "usbConnectionFailed": "Neúspešné pripojenie cez USB: {error}",
   "usbStatus_notConnected": "Vyberte USB zariadenie",
   "usbStatus_connecting": "Pripojenie k USB zariadeniu...",
-  "usbErrorConnectTimedOut": "Pripojenie nebolo úspešné. Uistite sa, že zariadenie má nainštalovaný firmware USB Companion."
+  "usbErrorConnectTimedOut": "Pripojenie nebolo úspešné. Uistite sa, že zariadenie má nainštalovaný firmware USB Companion.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostHint": "192.168.40.10",
+  "tcpHostLabel": "IP adresa",
+  "tcpScreenTitle": "Spojte sa pomocou protokolu TCP",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpPortLabel": "Port",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Zadajte cieľovú adresu a pripojte sa.",
+  "tcpStatus_connectingTo": "Pripojenie k {endpoint}...",
+  "tcpErrorHostRequired": "Je potrebné zadať IP adresu.",
+  "tcpErrorPortInvalid": "Číslo portu musí byť medzi 1 a 65535.",
+  "tcpErrorUnsupported": "Prevoz prostredníctvom protokolu TCP nie je na tejto platforme podporovaný.",
+  "tcpErrorTimedOut": "Pripojenie TCP vypršalo.",
+  "tcpConnectionFailed": "Neúspešné vytvorenie TCP spojenia: {error}",
+  "map_showDiscoveryContacts": "Zobraziť kontakty objavov",
+  "map_setAsMyLocation": "Nastavte ako moju polohu"
 }

lib/l10n/app_sl.arb

@@ -1859,5 +1859,34 @@
   "usbStatus_connecting": "Povezava z USB napravo...",
   "usbStatus_searching": "Iskanje USB naprav...",
   "usbConnectionFailed": "Napaka pri povezavi preko USB: {error}",
-  "usbErrorConnectTimedOut": "Vzpostavitve ni bilo mogo. Prosimo, da se prepričate, da ima naprave trenutno nameštan firmware USB Companion."
+  "usbErrorConnectTimedOut": "Vzpostavitve ni bilo mogo. Prosimo, da se prepričate, da ima naprave trenutno nameštan firmware USB Companion.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpHostLabel": "IP naslov",
+  "tcpHostHint": "192.168.40.10",
+  "tcpScreenTitle": "Komunicirajte preko protokola TCP",
+  "tcpPortLabel": "Vrata",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Vnesite končni naslov in se povežite",
+  "tcpStatus_connectingTo": "Povezava z {endpoint}...",
+  "tcpErrorHostRequired": "Potrebna je IP-naslov.",
+  "tcpErrorPortInvalid": "Port mora biti med 1 in 65535.",
+  "tcpErrorUnsupported": "Transport preko protokola TCP ni podprt na tej platformi.",
+  "tcpErrorTimedOut": "Povezava TCP je presegla časovno obdobje.",
+  "tcpConnectionFailed": "Napaka pri povezavi TCP: {error}",
+  "map_showDiscoveryContacts": "Prikaži odkritja kontaktov",
+  "map_setAsMyLocation": "Nastavite to kot mojo lokacijo"
 }

lib/l10n/app_sv.arb

@@ -1859,5 +1859,34 @@
   "usbStatus_notConnected": "Välj en USB-enhet",
   "usbConnectionFailed": "Fel vid USB-anslutning: {error}",
   "usbStatus_searching": "Söker efter USB-enheter...",
-  "usbErrorConnectTimedOut": "Anslutningen har tidsutgått. Se till att enheten har rätt USB-firmware."
+  "usbErrorConnectTimedOut": "Anslutningen har tidsutgått. Se till att enheten har rätt USB-firmware.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostHint": "192.168.40.10",
+  "tcpHostLabel": "IP-adress",
+  "tcpScreenTitle": "Anslut via TCP",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpPortLabel": "Port",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Ange slutpunkt och anslut",
+  "tcpStatus_connectingTo": "Anslutning till {endpoint}...",
+  "tcpErrorHostRequired": "IP-adress krävs.",
+  "tcpErrorPortInvalid": "Porten måste vara mellan 1 och 65535.",
+  "tcpErrorUnsupported": "TCP-transport fungerar inte på denna plattform.",
+  "tcpErrorTimedOut": "TCP-anslutningen har tidsut gått.",
+  "tcpConnectionFailed": "Fel vid TCP-anslutning: {error}",
+  "map_showDiscoveryContacts": "Visa Discovery-kontakter",
+  "map_setAsMyLocation": "Ange som min plats"
 }

lib/l10n/app_uk.arb

@@ -1859,5 +1859,34 @@
   "usbStatus_notConnected": "Виберіть пристрій USB",
   "usbConnectionFailed": "Не вдалося встановити з'єднання через USB: {error}",
   "usbStatus_connecting": "Підключення до USB-пристрою...",
-  "usbErrorConnectTimedOut": "З'єднання не вдалося встановити. Переконайтеся, що пристрій має встановлене програмне забезпечення USB Companion."
+  "usbErrorConnectTimedOut": "З'єднання не вдалося встановити. Переконайтеся, що пристрій має встановлене програмне забезпечення USB Companion.",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpHostHint": "192.168.40.10",
+  "tcpHostLabel": "IP-адреса",
+  "tcpScreenTitle": "З'єднатися через протокол TCP",
+  "tcpPortLabel": "Порт",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "Введіть кінцеву точку та підключіться",
+  "tcpStatus_connectingTo": "Підключення до {endpoint}...",
+  "tcpErrorHostRequired": "Необхідно вказати IP-адресу.",
+  "tcpErrorPortInvalid": "Порт повинен бути в межах від 1 до 65535.",
+  "tcpErrorUnsupported": "Транспорт TCP не підтримується на цій платформі.",
+  "tcpErrorTimedOut": "З'єднання TCP завершилося через закінчення часу очікування.",
+  "tcpConnectionFailed": "Не вдалося встановити з'єднання TCP: {error}",
+  "map_showDiscoveryContacts": "Показати контакти Відкриття",
+  "map_setAsMyLocation": "Встановити моє місцезнаходження"
 }

lib/l10n/app_zh.arb

@@ -1864,5 +1864,34 @@
   "usbStatus_connecting": "连接USB设备...",
   "usbStatus_notConnected": "选择一个 USB 设备",
   "usbConnectionFailed": "USB 连接失败：{error}",
-  "usbErrorConnectTimedOut": "连接超时。请确保设备已安装 USB 伴侣固件。"
+  "usbErrorConnectTimedOut": "连接超时。请确保设备已安装 USB 伴侣固件。",
+  "@tcpStatus_connectingTo": {
+    "placeholders": {
+      "endpoint": {
+        "type": "String"
+      }
+    }
+  },
+  "@tcpConnectionFailed": {
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "tcpHostLabel": "IP地址",
+  "tcpHostHint": "192.168.40.10",
+  "tcpScreenTitle": "通过 TCP 连接",
+  "connectionChoiceTcpLabel": "TCP",
+  "tcpPortLabel": "端口",
+  "tcpPortHint": "5000",
+  "tcpStatus_notConnected": "输入目标地址，然后连接",
+  "tcpStatus_connectingTo": "连接到 {endpoint}...",
+  "tcpErrorHostRequired": "需要提供IP地址。",
+  "tcpErrorPortInvalid": "端口号必须在 1 到 65535 之间。",
+  "tcpErrorUnsupported": "此平台不支持 TCP 传输。",
+  "tcpErrorTimedOut": "TCP 连接超时。",
+  "tcpConnectionFailed": "TCP 连接失败：{error}",
+  "map_showDiscoveryContacts": "显示发现联系人",
+  "map_setAsMyLocation": "设置为我的位置"
 }

lib/main.dart

@@ -19,6 +19,7 @@ import 'services/app_debug_log_service.dart';
 import 'services/background_service.dart';
 import 'services/map_tile_cache_service.dart';
 import 'services/chat_text_scale_service.dart';
+import 'services/timeout_prediction_service.dart';
 import 'storage/prefs_manager.dart';
 import 'utils/app_logger.dart';
 
@@ -39,6 +40,7 @@ void main() async {
   final backgroundService = BackgroundService();
   final mapTileCacheService = MapTileCacheService();
   final chatTextScaleService = ChatTextScaleService();
+  final timeoutPredictionService = TimeoutPredictionService(storage);
 
   // Load settings
   await appSettingsService.loadSettings();
@@ -56,6 +58,7 @@ void main() async {
   _registerThirdPartyLicenses();
 
   await chatTextScaleService.initialize();
+  await timeoutPredictionService.initialize();
 
   // Wire up connector with services
   connector.initialize(
@@ -65,6 +68,7 @@ void main() async {
     bleDebugLogService: bleDebugLogService,
     appDebugLogService: appDebugLogService,
     backgroundService: backgroundService,
+    timeoutPredictionService: timeoutPredictionService,
   );
 
   await connector.loadContactCache();
@@ -86,6 +90,7 @@ void main() async {
       appDebugLogService: appDebugLogService,
       mapTileCacheService: mapTileCacheService,
       chatTextScaleService: chatTextScaleService,
+      timeoutPredictionService: timeoutPredictionService,
     ),
   );
 }
@@ -121,6 +126,7 @@ class MeshCoreApp extends StatelessWidget {
   final AppDebugLogService appDebugLogService;
   final MapTileCacheService mapTileCacheService;
   final ChatTextScaleService chatTextScaleService;
+  final TimeoutPredictionService timeoutPredictionService;
 
   const MeshCoreApp({
     super.key,
@@ -133,6 +139,7 @@ class MeshCoreApp extends StatelessWidget {
     required this.appDebugLogService,
     required this.mapTileCacheService,
     required this.chatTextScaleService,
+    required this.timeoutPredictionService,
   });
 
   @override
@@ -148,6 +155,7 @@ class MeshCoreApp extends StatelessWidget {
         ChangeNotifierProvider.value(value: chatTextScaleService),
         Provider.value(value: storage),
         Provider.value(value: mapTileCacheService),
+        ChangeNotifierProvider.value(value: timeoutPredictionService),
       ],
       child: Consumer<AppSettingsService>(
         builder: (context, settingsService, child) {

lib/models/app_settings.dart

@@ -39,6 +39,7 @@ class AppSettings {
   final Map<String, String> batteryChemistryByRepeaterId;
   final UnitSystem unitSystem;
   final Set<String> mutedChannels;
+  final bool mapShowDiscoveryContacts;
 
   AppSettings({
     this.clearPathOnMaxRetry = false,
@@ -66,6 +67,7 @@ class AppSettings {
     Map<String, String>? batteryChemistryByRepeaterId,
     this.unitSystem = UnitSystem.metric,
     Set<String>? mutedChannels,
+    this.mapShowDiscoveryContacts = true,
   }) : batteryChemistryByDeviceId = batteryChemistryByDeviceId ?? {},
        batteryChemistryByRepeaterId = batteryChemistryByRepeaterId ?? {},
        mutedChannels = mutedChannels ?? {};
@@ -97,6 +99,7 @@ class AppSettings {
       'battery_chemistry_by_repeater_id': batteryChemistryByRepeaterId,
       'unit_system': unitSystem.value,
       'muted_channels': mutedChannels.toList(),
+      'map_show_discovery_contacts': mapShowDiscoveryContacts,
     };
   }
 
@@ -152,6 +155,8 @@ class AppSettings {
               ?.map((e) => e.toString())
               .toSet()) ??
           {},
+      mapShowDiscoveryContacts:
+          json['map_show_discovery_contacts'] as bool? ?? true,
     );
   }
 
@@ -181,6 +186,7 @@ class AppSettings {
     Map<String, String>? batteryChemistryByRepeaterId,
     UnitSystem? unitSystem,
     Set<String>? mutedChannels,
+    bool? mapShowDiscoveryContacts,
   }) {
     return AppSettings(
       clearPathOnMaxRetry: clearPathOnMaxRetry ?? this.clearPathOnMaxRetry,
@@ -217,6 +223,8 @@ class AppSettings {
           batteryChemistryByRepeaterId ?? this.batteryChemistryByRepeaterId,
       unitSystem: unitSystem ?? this.unitSystem,
       mutedChannels: mutedChannels ?? this.mutedChannels,
+      mapShowDiscoveryContacts:
+          mapShowDiscoveryContacts ?? this.mapShowDiscoveryContacts,
     );
   }
 }

lib/models/contact.dart

@@ -17,6 +17,8 @@ class Contact {
   final double? longitude;
   final DateTime lastSeen;
   final DateTime lastMessageAt;
+  final bool isActive;
+  final Uint8List? rawPacket;
 
   Contact({
     required this.publicKey,
@@ -31,6 +33,8 @@ class Contact {
     this.longitude,
     required this.lastSeen,
     DateTime? lastMessageAt,
+    this.isActive = true,
+    this.rawPacket,
   }) : lastMessageAt = lastMessageAt ?? lastSeen;
 
   String get publicKeyHex => pubKeyToHex(publicKey);
@@ -78,6 +82,8 @@ class Contact {
     double? longitude,
     DateTime? lastSeen,
     DateTime? lastMessageAt,
+    bool? isActive,
+    Uint8List? rawPacket,
   }) {
     return Contact(
       publicKey: publicKey ?? this.publicKey,
@@ -96,6 +102,8 @@ class Contact {
       longitude: longitude ?? this.longitude,
       lastSeen: lastSeen ?? this.lastSeen,
       lastMessageAt: lastMessageAt ?? this.lastMessageAt,
+      isActive: isActive ?? this.isActive,
+      rawPacket: rawPacket ?? this.rawPacket,
     );
   }
 
@@ -204,6 +212,8 @@ class Contact {
         latitude: lat,
         longitude: lon,
         lastSeen: DateTime.fromMillisecondsSinceEpoch(lastMod * 1000),
+        isActive: true,
+        rawPacket: null,
       );
     } catch (e) {
       appLogger.error('Failed to parse contact frame: $e');

lib/models/delivery_observation.dart

@@ -0,0 +1,43 @@
+class DeliveryObservation {
+  final String contactKey;
+  final int pathLength;
+  final int messageBytes;
+  final int secondsSinceLastRx;
+  final bool isFlood;
+  final int deliveryMs;
+  final DateTime timestamp;
+
+  DeliveryObservation({
+    required this.contactKey,
+    required this.pathLength,
+    required this.messageBytes,
+    required this.secondsSinceLastRx,
+    required this.isFlood,
+    required this.deliveryMs,
+    required this.timestamp,
+  });
+
+  Map<String, dynamic> toJson() {
+    return {
+      'contact_key': contactKey,
+      'path_length': pathLength,
+      'message_bytes': messageBytes,
+      'seconds_since_last_rx': secondsSinceLastRx,
+      'is_flood': isFlood,
+      'delivery_ms': deliveryMs,
+      'timestamp': timestamp.toIso8601String(),
+    };
+  }
+
+  factory DeliveryObservation.fromJson(Map<String, dynamic> json) {
+    return DeliveryObservation(
+      contactKey: json['contact_key'] as String,
+      pathLength: json['path_length'] as int,
+      messageBytes: json['message_bytes'] as int,
+      secondsSinceLastRx: json['seconds_since_last_rx'] as int? ?? 0,
+      isFlood: json['is_flood'] as bool,
+      deliveryMs: json['delivery_ms'] as int,
+      timestamp: DateTime.parse(json['timestamp'] as String),
+    );
+  }
+}

lib/models/discovery_contact.dart

@@ -1,105 +0,0 @@
-import 'dart:typed_data';
-import '../connector/meshcore_protocol.dart';
-
-class DiscoveryContact {
-  final Uint8List rawPacket;
-  final Uint8List publicKey;
-  final String name;
-  final int type;
-  final int pathLength; // -1 = flood, 0+ = direct hops (from device)
-  final Uint8List path; // Path bytes from device
-  final double? latitude;
-  final double? longitude;
-  final DateTime lastSeen;
-
-  DiscoveryContact({
-    required this.rawPacket,
-    required this.publicKey,
-    required this.name,
-    required this.type,
-    required this.pathLength,
-    required this.path,
-    this.latitude,
-    this.longitude,
-    required this.lastSeen,
-  });
-
-  String get publicKeyHex => pubKeyToHex(publicKey);
-
-  String get typeLabel {
-    switch (type) {
-      case advTypeChat:
-        return 'Chat';
-      case advTypeRepeater:
-        return 'Repeater';
-      case advTypeRoom:
-        return 'Room';
-      case advTypeSensor:
-        return 'Sensor';
-      default:
-        return 'Unknown';
-    }
-  }
-
-  String get pathLabel {
-    if (pathLength < 0) return 'Flood';
-    if (pathLength == 0) return 'Direct';
-    return '$pathLength hops';
-  }
-
-  bool get hasLocation => latitude != null && longitude != null;
-
-  DiscoveryContact copyWith({
-    Uint8List? rawPacket,
-    Uint8List? publicKey,
-    String? name,
-    int? type,
-    int? pathLength,
-    Uint8List? path,
-    double? latitude,
-    double? longitude,
-    DateTime? lastSeen,
-  }) {
-    return DiscoveryContact(
-      rawPacket: rawPacket ?? this.rawPacket,
-      publicKey: publicKey ?? this.publicKey,
-      name: name ?? this.name,
-      type: type ?? this.type,
-      pathLength: pathLength ?? this.pathLength,
-      path: path ?? this.path,
-      latitude: latitude ?? this.latitude,
-      longitude: longitude ?? this.longitude,
-      lastSeen: lastSeen ?? this.lastSeen,
-    );
-  }
-
-  String get pathIdList {
-    final pathBytes = path;
-    if (pathBytes.isEmpty) return '';
-    final parts = <String>[];
-    final groupSize = pathHashSize;
-    for (int i = 0; i < pathBytes.length; i += groupSize) {
-      final end = (i + groupSize) <= pathBytes.length
-          ? (i + groupSize)
-          : pathBytes.length;
-      final chunk = pathBytes.sublist(i, end);
-      parts.add(
-        chunk
-            .map((b) => b.toRadixString(16).padLeft(2, '0').toUpperCase())
-            .join(),
-      );
-    }
-    return parts.join(',');
-  }
-
-  String get shortPubKeyHex {
-    return "<${publicKeyHex.substring(0, 8)}...${publicKeyHex.substring(publicKeyHex.length - 8)}>";
-  }
-
-  @override
-  bool operator ==(Object other) =>
-      other is DiscoveryContact && publicKeyHex == other.publicKeyHex;
-
-  @override
-  int get hashCode => publicKeyHex.hashCode;
-}

lib/screens/ble_debug_log_screen.dart

@@ -118,6 +118,19 @@ class _BleDebugLogScreenState extends State<BleDebugLogScreen> {
                                       : Icons.download,
                                   size: 18,
                                 ),
+                                onLongPress: () async {
+                                  await Clipboard.setData(
+                                    ClipboardData(
+                                      text: entry.payload
+                                          .map(
+                                            (b) => b
+                                                .toRadixString(16)
+                                                .padLeft(2, '0'),
+                                          )
+                                          .join(''),
+                                    ),
+                                  );
+                                },
                               );
                             }
 

lib/screens/channel_message_path_screen.dart

@@ -40,8 +40,11 @@ class ChannelMessagePathScreen extends StatelessWidget {
         final primaryPath = !channelMessage && !message.isOutgoing
             ? Uint8List.fromList(primaryPathTmp.reversed.toList())
             : primaryPathTmp;
-
+        final contacts = <Contact>[
-        final hops = _buildPathHops(primaryPath, connector.contacts, l10n);
+          ...connector.contacts,
+          ...connector.discoveredContacts,
+        ];
+        final hops = _buildPathHops(primaryPath, contacts, l10n);
         final hasHopDetails = primaryPath.isNotEmpty;
         final observedLabel = _formatObservedHops(
           primaryPath.length,
@@ -364,11 +367,11 @@ class _ChannelMessagePathMapScreenState
             : selectedPathTmp;
 
         final selectedIndex = _indexForPath(selectedPath, observedPaths);
-        final hops = _buildPathHops(
+        final contacts = <Contact>[
-          selectedPath,
+          ...connector.contacts,
-          connector.contacts,
+          ...connector.discoveredContacts,
-          context.l10n,
+        ];
-        );
+        final hops = _buildPathHops(selectedPath, contacts, context.l10n);
 
         final points = <LatLng>[];
 

lib/screens/channels_screen.dart

@@ -51,6 +51,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
   // Cache of PSK hex -> Community for quick lookup
   final Map<String, Community> _pskToCommunity = {};
 
+  ChannelMessageStore get _channelMessageStore => ChannelMessageStore();
+
   @override
   void initState() {
     super.initState();
@@ -61,6 +63,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
   }
 
   Future<void> _loadCommunities() async {
+    final connector = context.read<MeshCoreConnector>();
+    _communityStore.setPublicKeyHex = connector.selfPublicKeyHex;
     final communities = await _communityStore.loadCommunities();
     if (mounted) {
       setState(() {
@@ -714,6 +718,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
     bool isRegularHashtag = true;
     Community? selectedCommunity;
 
+    _communityStore.setPublicKeyHex = connector.selfPublicKeyHex;
+
     showDialog(
       context: context,
       builder: (dialogContext) => StatefulBuilder(
@@ -765,7 +771,9 @@ class _ChannelsScreenState extends State<ChannelsScreen>
             );
           }
 
-          Widget? buildExpandedContent() {
+          Widget? buildExpandedContent(
+            ChannelMessageStore channelMessageStore,
+          ) {
             switch (selectedOption) {
               case 0: // Create Private Channel
                 return Column(
@@ -790,7 +798,7 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                         children: [
                           Expanded(
                             child: FilledButton(
-                              onPressed: () {
+                              onPressed: () async {
                                 final name = nameController.text.trim();
                                 if (name.isEmpty) {
                                   ScaffoldMessenger.of(
@@ -812,7 +820,14 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                                   psk[i] = random.nextInt(256);
                                 }
                                 Navigator.pop(dialogContext);
-                                connector.setChannel(nextIndex, name, psk);
+                                await connector.setChannel(
+                                  nextIndex,
+                                  name,
+                                  psk,
+                                );
+                                await channelMessageStore.clearChannelMessages(
+                                  nextIndex,
+                                );
                                 if (context.mounted) {
                                   ScaffoldMessenger.of(context).showSnackBar(
                                     SnackBar(
@@ -1331,7 +1346,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                       subtitle:
                           dialogContext.l10n.channels_createPrivateChannelDesc,
                     ),
-                    if (selectedOption == 0) buildExpandedContent()!,
+                    if (selectedOption == 0)
+                      buildExpandedContent(_channelMessageStore)!,
                     const Divider(height: 1),
                     buildOptionTile(
                       optionIndex: 1,
@@ -1340,7 +1356,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                       subtitle:
                           dialogContext.l10n.channels_joinPrivateChannelDesc,
                     ),
-                    if (selectedOption == 1) buildExpandedContent()!,
+                    if (selectedOption == 1)
+                      buildExpandedContent(_channelMessageStore)!,
                     if (!hasPublicChannel) ...[
                       const Divider(height: 1),
                       buildOptionTile(
@@ -1350,7 +1367,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                         subtitle:
                             dialogContext.l10n.channels_joinPublicChannelDesc,
                       ),
-                      if (selectedOption == 2) buildExpandedContent()!,
+                      if (selectedOption == 2)
+                        buildExpandedContent(_channelMessageStore)!,
                     ],
                     const Divider(height: 1),
                     buildOptionTile(
@@ -1360,7 +1378,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                       subtitle:
                           dialogContext.l10n.channels_joinHashtagChannelDesc,
                     ),
-                    if (selectedOption == 3) buildExpandedContent()!,
+                    if (selectedOption == 3)
+                      buildExpandedContent(_channelMessageStore)!,
                     const Divider(height: 1),
                     buildOptionTile(
                       optionIndex: 4,
@@ -1368,7 +1387,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                       title: dialogContext.l10n.community_scanQr,
                       subtitle: dialogContext.l10n.community_join,
                     ),
-                    if (selectedOption == 4) buildExpandedContent()!,
+                    if (selectedOption == 4)
+                      buildExpandedContent(_channelMessageStore)!,
                     const Divider(height: 1),
                     buildOptionTile(
                       optionIndex: 5,
@@ -1376,7 +1396,8 @@ class _ChannelsScreenState extends State<ChannelsScreen>
                       title: dialogContext.l10n.community_create,
                       subtitle: dialogContext.l10n.community_createDesc,
                     ),
-                    if (selectedOption == 5) buildExpandedContent()!,
+                    if (selectedOption == 5)
+                      buildExpandedContent(_channelMessageStore)!,
                   ],
                 ),
               ),
@@ -1526,7 +1547,7 @@ class _ChannelsScreenState extends State<ChannelsScreen>
               try {
                 await connector.deleteChannel(channel.index);
 
-                channelMessageStore.clearChannelMessages(channel.index);
+                await channelMessageStore.clearChannelMessages(channel.index);
 
                 if (!context.mounted) return;
 
@@ -1751,6 +1772,7 @@ class _ChannelsScreenState extends State<ChannelsScreen>
     }
 
     final channelCount = communityChannels.length;
+    _communityStore.setPublicKeyHex = connector.selfPublicKeyHex;
 
     showDialog(
       context: context,

lib/screens/chat_screen.dart

@@ -106,10 +106,9 @@ class _ChatScreenState extends State<ChatScreen> {
             final unreadLabel = context.l10n.chat_unread(unreadCount);
             final pathLabel = _currentPathLabel(contact);
 
-            // Show path details if we have path data (from device or override)
+            // Show path details if we have non-empty path data (from device or override)
-            final hasPathData =
-                contact.path.isNotEmpty || contact.pathOverrideBytes != null;
             final effectivePath = contact.pathOverrideBytes ?? contact.path;
+            final hasPathData = effectivePath.isNotEmpty;
 
             return Column(
               crossAxisAlignment: CrossAxisAlignment.start,
@@ -143,12 +142,25 @@ class _ChatScreenState extends State<ChatScreen> {
               final contact = _resolveContact(connector);
               final isFloodMode = contact.pathOverride == -1;
 
+              final isDirectMode = contact.pathOverride == 0;
+              final activeMode = isFloodMode
+                  ? 'flood'
+                  : isDirectMode
+                  ? 'direct'
+                  : 'auto';
+
               return PopupMenuButton<String>(
                 icon: Icon(isFloodMode ? Icons.waves : Icons.route),
                 tooltip: context.l10n.chat_routingMode,
                 onSelected: (mode) async {
                   if (mode == 'flood') {
                     await connector.setPathOverride(contact, pathLen: -1);
+                  } else if (mode == 'direct') {
+                    await connector.setPathOverride(
+                      contact,
+                      pathLen: 0,
+                      pathBytes: Uint8List(0),
+                    );
                   } else {
                     await connector.setPathOverride(contact, pathLen: null);
                   }
@@ -161,7 +173,7 @@ class _ChatScreenState extends State<ChatScreen> {
                         Icon(
                           Icons.auto_mode,
                           size: 20,
-                          color: !isFloodMode
+                          color: activeMode == 'auto'
                               ? Theme.of(context).primaryColor
                               : null,
                         ),
@@ -169,7 +181,30 @@ class _ChatScreenState extends State<ChatScreen> {
                         Text(
                           context.l10n.chat_autoUseSavedPath,
                           style: TextStyle(
-                            fontWeight: !isFloodMode
+                            fontWeight: activeMode == 'auto'
+                                ? FontWeight.bold
+                                : FontWeight.normal,
+                          ),
+                        ),
+                      ],
+                    ),
+                  ),
+                  PopupMenuItem(
+                    value: 'direct',
+                    child: Row(
+                      children: [
+                        Icon(
+                          Icons.near_me,
+                          size: 20,
+                          color: activeMode == 'direct'
+                              ? Theme.of(context).primaryColor
+                              : null,
+                        ),
+                        const SizedBox(width: 8),
+                        Text(
+                          context.l10n.chat_direct,
+                          style: TextStyle(
+                            fontWeight: activeMode == 'direct'
                                 ? FontWeight.bold
                                 : FontWeight.normal,
                           ),
@@ -184,7 +219,7 @@ class _ChatScreenState extends State<ChatScreen> {
                         Icon(
                           Icons.waves,
                           size: 20,
-                          color: isFloodMode
+                          color: activeMode == 'flood'
                               ? Theme.of(context).primaryColor
                               : null,
                         ),
@@ -192,7 +227,7 @@ class _ChatScreenState extends State<ChatScreen> {
                         Text(
                           context.l10n.chat_forceFloodMode,
                           style: TextStyle(
-                            fontWeight: isFloodMode
+                            fontWeight: activeMode == 'flood'
                                 ? FontWeight.bold
                                 : FontWeight.normal,
                           ),
@@ -251,7 +286,9 @@ class _ChatScreenState extends State<ChatScreen> {
           ),
           const SizedBox(height: 8),
           Text(
-            context.l10n.chat_sendMessageTo(widget.contact.name),
+            context.l10n.chat_sendMessageTo(
+              _resolveContact(context.read<MeshCoreConnector>()).name,
+            ),
             style: TextStyle(fontSize: 14, color: Colors.grey[500]),
           ),
         ],
@@ -269,6 +306,7 @@ class _ChatScreenState extends State<ChatScreen> {
 
     // Auto-scroll to bottom if user is already at bottom
     WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (!mounted) return;
       _scrollController.scrollToBottomIfAtBottom();
     });
 
@@ -293,10 +331,10 @@ class _ChatScreenState extends State<ChatScreen> {
             );
           }
           final messageIndex = index;
-          Contact contact = widget.contact;
+          Contact contact = _resolveContact(connector);
           final message = reversedMessages[messageIndex];
           String fourByteHex = '';
-          if (widget.contact.type == advTypeRoom) {
+          if (contact.type == advTypeRoom) {
             contact = _resolveContactFrom4Bytes(
               connector,
               message.fourByteRoomContactKey.isEmpty
@@ -314,12 +352,13 @@ class _ChatScreenState extends State<ChatScreen> {
               final textScale = context.select<ChatTextScaleService, double>(
                 (service) => service.scale,
               );
+              final resolvedContact = _resolveContact(connector);
               return _MessageBubble(
                 message: message,
-                senderName: widget.contact.type == advTypeRoom
+                senderName: resolvedContact.type == advTypeRoom
                     ? "${contact.name} [$fourByteHex]"
                     : contact.name,
-                isRoomServer: widget.contact.type == advTypeRoom,
+                isRoomServer: resolvedContact.type == advTypeRoom,
                 textScale: textScale,
                 onTap: () => _openMessagePath(message, contact),
                 onLongPress: () => _showMessageActions(message, contact),
@@ -457,7 +496,7 @@ class _ChatScreenState extends State<ChatScreen> {
       return;
     }
 
-    connector.sendMessage(widget.contact, text);
+    connector.sendMessage(_resolveContact(connector), text);
     _textController.clear();
     _textFieldFocusNode.requestFocus();
   }
@@ -654,7 +693,7 @@ class _ChatScreenState extends State<ChatScreen> {
 
                                 // Set the path override to persist user's choice
                                 await connector.setPathOverride(
-                                  widget.contact,
+                                  _resolveContact(connector),
                                   pathLen: pathLength,
                                   pathBytes: pathBytes,
                                 );
@@ -663,7 +702,7 @@ class _ChatScreenState extends State<ChatScreen> {
                                 Navigator.pop(context);
                                 await _notifyPathSet(
                                   connector,
-                                  widget.contact,
+                                  _resolveContact(connector),
                                   pathBytes,
                                   path.hopCount,
                                 );
@@ -722,7 +761,9 @@ class _ChatScreenState extends State<ChatScreen> {
                         style: const TextStyle(fontSize: 11),
                       ),
                       onTap: () async {
-                        await connector.clearContactPath(widget.contact);
+                        await connector.clearContactPath(
+                          _resolveContact(connector),
+                        );
                         if (!context.mounted) return;
                         ScaffoldMessenger.of(context).showSnackBar(
                           SnackBar(
@@ -750,7 +791,7 @@ class _ChatScreenState extends State<ChatScreen> {
                       ),
                       onTap: () async {
                         await connector.setPathOverride(
-                          widget.contact,
+                          _resolveContact(connector),
                           pathLen: -1,
                         );
                         if (!context.mounted) return;
@@ -1005,11 +1046,7 @@ class _ChatScreenState extends State<ChatScreen> {
     );
 
     if (result == null) {
-      appLogger.info(
+      return; // Cancelled — keep existing path
-        'PathSelectionDialog was cancelled or returned null',
-        tag: 'ChatScreen',
-      );
-      return;
     }
 
     if (!mounted) {
@@ -1025,14 +1062,19 @@ class _ChatScreenState extends State<ChatScreen> {
       tag: 'ChatScreen',
     );
     await connector.setPathOverride(
-      widget.contact,
+      _resolveContact(connector),
       pathLen: result.length,
       pathBytes: result,
     );
     appLogger.info('setPathOverride completed', tag: 'ChatScreen');
 
     if (!mounted) return;
-    await _notifyPathSet(connector, widget.contact, result, result.length);
+    await _notifyPathSet(
+      connector,
+      _resolveContact(connector),
+      result,
+      result.length,
+    );
   }
 
   void _openMessagePath(Message message, Contact contact) {
@@ -1044,10 +1086,10 @@ class _ChatScreenState extends State<ChatScreen> {
     final String senderName;
     if (message.isOutgoing) {
       senderName = connector.selfName ?? context.l10n.chat_me;
-    } else if (widget.contact.type == advTypeRoom) {
+    } else if (_resolveContact(connector).type == advTypeRoom) {
       senderName = "${contact.name} [$fourByteHex]";
     } else {
-      senderName = widget.contact.name;
+      senderName = _resolveContact(connector).name;
     }
     final pathMessage = ChannelMessage(
       senderKey: null,
@@ -1110,7 +1152,8 @@ class _ChatScreenState extends State<ChatScreen> {
                   _retryMessage(message);
                 },
               ),
-            if (widget.contact.type == advTypeRoom)
+            if (_resolveContact(context.read<MeshCoreConnector>()).type ==
+                advTypeRoom)
               ListTile(
                 leading: const Icon(Icons.chat),
                 title: Text(context.l10n.contacts_openChat),
@@ -1148,7 +1191,7 @@ class _ChatScreenState extends State<ChatScreen> {
   void _retryMessage(Message message) {
     final connector = Provider.of<MeshCoreConnector>(context, listen: false);
     // Retry using the contact's current path override setting
-    connector.sendMessage(widget.contact, message.text);
+    connector.sendMessage(_resolveContact(connector), message.text);
     ScaffoldMessenger.of(
       context,
     ).showSnackBar(SnackBar(content: Text(context.l10n.chat_retryingMessage)));
@@ -1174,7 +1217,8 @@ class _ChatScreenState extends State<ChatScreen> {
 
     // For room servers, include sender name (like channels) since multiple users
     // For 1:1 chats, sender is implicit (null)
-    final senderName = widget.contact.type == advTypeRoom
+    final liveContact = _resolveContact(connector);
+    final senderName = liveContact.type == advTypeRoom
         ? senderContact.name
         : null;
     final hash = ReactionHelper.computeReactionHash(
@@ -1183,7 +1227,7 @@ class _ChatScreenState extends State<ChatScreen> {
       message.text,
     );
     final reactionText = 'r:$hash:$emojiIndex';
-    connector.sendMessage(widget.contact, reactionText);
+    connector.sendMessage(_resolveContact(connector), reactionText);
   }
 }
 

lib/screens/community_qr_scanner_screen.dart

@@ -51,6 +51,9 @@ class _CommunityQrScannerScreenState extends State<CommunityQrScannerScreen> {
       _isProcessing = true;
     });
 
+    final connector = context.read<MeshCoreConnector>();
+    _communityStore.setPublicKeyHex = connector.selfPublicKeyHex;
+
     try {
       // Parse the community data
       final community = Community.fromQrData(const Uuid().v4(), data);
@@ -209,6 +212,8 @@ class _CommunityQrScannerScreenState extends State<CommunityQrScannerScreen> {
     bool addPublicChannel,
   ) async {
     // Save community to local storage
+    final connector = context.read<MeshCoreConnector>();
+    _communityStore.setPublicKeyHex = connector.selfPublicKeyHex;
     await _communityStore.addCommunity(community);
 
     // Optionally add the community public channel to the device

lib/screens/contacts_screen.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:meshcore_open/screens/path_trace_map.dart';
+import 'package:meshcore_open/services/notification_service.dart';
 import 'package:meshcore_open/utils/app_logger.dart';
 import 'package:meshcore_open/widgets/app_bar.dart';
 import 'package:provider/provider.dart';
@@ -64,6 +65,13 @@ class _ContactsScreenState extends State<ContactsScreen>
     super.initState();
     _loadGroups();
     _setupFrameListener();
+    _clearAdvertNotifications();
+  }
+
+  void _clearAdvertNotifications() {
+    final connector = context.read<MeshCoreConnector>();
+    final contactIds = connector.contacts.map((c) => c.publicKeyHex).toList();
+    NotificationService().clearAdvertNotifications(contactIds);
   }
 
   @override

lib/screens/discovery_screen.dart

@@ -7,7 +7,7 @@ import 'package:provider/provider.dart';
 import '../connector/meshcore_connector.dart';
 import '../connector/meshcore_protocol.dart';
 import '../l10n/l10n.dart';
-import '../models/discovery_contact.dart';
+import '../models/contact.dart';
 import '../utils/contact_search.dart';
 import '../widgets/app_bar.dart';
 import '../widgets/list_filter_widget.dart';
@@ -129,7 +129,7 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
   }
 
   Future<void> _showContactContextMenu(
-    DiscoveryContact contact,
+    Contact contact,
     MeshCoreConnector connector,
   ) async {
     final action = await showModalBottomSheet<String>(
@@ -169,7 +169,8 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
         connector.importDiscoveredContact(contact);
         break;
       case 'copy_contact':
-        final hexString = pubKeyToHex(contact.rawPacket);
+        if (contact.rawPacket == null) return;
+        final hexString = pubKeyToHex(contact.rawPacket!);
         Clipboard.setData(ClipboardData(text: "meshcore://$hexString"));
         if (!mounted) return;
         ScaffoldMessenger.of(context).showSnackBar(
@@ -207,7 +208,7 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
   }
 
   Widget _buildFilters(
-    List<DiscoveryContact> filteredAndSorted,
+    List<Contact> filteredAndSorted,
     MeshCoreConnector connector,
   ) {
     String hintText = "";
@@ -309,8 +310,8 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
     );
   }
 
-  List<DiscoveryContact> _filterAndSortContacts(
+  List<Contact> _filterAndSortContacts(
-    List<DiscoveryContact> contacts,
+    List<Contact> contacts,
     MeshCoreConnector connector,
   ) {
     var filtered = contacts.where((contact) {
@@ -350,7 +351,7 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
     return filtered;
   }
 
-  bool _matchesTypeFilter(DiscoveryContact contact) {
+  bool _matchesTypeFilter(Contact contact) {
     switch (typeFilter) {
       case ContactTypeFilter.all:
         return true;

lib/screens/map_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:math';
 import 'dart:typed_data';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_map/flutter_map.dart';
 import 'package:latlong2/latlong.dart';
@@ -50,7 +51,8 @@ class MapScreen extends StatefulWidget {
 }
 
 class _MapScreenState extends State<MapScreen> {
-  static const double _labelZoomThreshold = 8.5;
+  // Zoom level at which node labels start to appear
+  static const double _labelZoomThreshold = 12.0;
 
   final MapController _mapController = MapController();
   final MapMarkerService _markerService = MapMarkerService();
@@ -91,6 +93,15 @@ class _MapScreenState extends State<MapScreen> {
     });
   }
 
+  bool _checkLocationPlausibility(double lat, double lon) {
+    const double epsilon = 1e-6;
+    return (lat.abs() > epsilon || lon.abs() > epsilon) &&
+        lat >= -90.0 &&
+        lat <= 90.0 &&
+        lon >= -180.0 &&
+        lon <= 180.0;
+  }
+
   double _standardDeviation(List<double> values) {
     if (values.length <= 1) {
       return 0.0;
@@ -126,7 +137,15 @@ class _MapScreenState extends State<MapScreen> {
       builder: (context, connector, settingsService, pathHistory, child) {
         final tileCache = context.read<MapTileCacheService>();
         final settings = settingsService.settings;
-        final contacts = connector.contacts;
+        final allContacts = <Contact>[
+          ...connector.contacts,
+          ...connector.discoveredContacts.where((c) => !c.isActive),
+        ];
+
+        final contacts = settings.mapShowDiscoveryContacts
+            ? allContacts
+            : allContacts.where((c) => c.isActive).toList();
+
         final highlightPosition = widget.highlightPosition;
         final sharedMarkers = settings.mapShowMarkers
             ? _collectSharedMarkers(connector)
@@ -159,14 +178,21 @@ class _MapScreenState extends State<MapScreen> {
             : filteredByTime;
 
         // Filter by location
-        final contactsWithLocation = filteredByKeyPrefix
+        final contactsWithLocation = filteredByKeyPrefix.where((c) {
-            .where((c) => c.hasLocation)
+          if (!c.hasLocation) {
-            .toList();
+            return false;
+          }
+          return _checkLocationPlausibility(c.latitude!, c.longitude!);
+        }).toList();
 
         // All contacts with a known location — used as anchors regardless of
         // time/key-prefix filters so that repeaters are always available.
-        final allContactsWithLocation = contacts
+        final allContactsWithLocation = allContacts
-            .where((c) => c.hasLocation)
+            .where(
+              (c) =>
+                  c.hasLocation &&
+                  _checkLocationPlausibility(c.latitude!, c.longitude!),
+            )
             .toList();
 
         // Compute guessed locations with caching
@@ -468,7 +494,10 @@ class _MapScreenState extends State<MapScreen> {
                             ),
                           ),
                         if (!_isBuildingPathTrace)
-                          ...guessedLocations.map(_buildGuessedMarker),
+                          ..._buildGuessedMarker(
+                            guessedLocations,
+                            showLabels: _showNodeLabels,
+                          ),
                         ..._buildMarkers(
                           contactsWithLocation,
                           settings,
@@ -630,6 +659,13 @@ class _MapScreenState extends State<MapScreen> {
           anchors[0].latitude + offsetDeg * cos(angle),
           anchors[0].longitude + offsetDeg * sin(angle),
         );
+
+        if (!_checkLocationPlausibility(
+          position.latitude,
+          position.longitude,
+        )) {
+          continue; // discard implausible guesses near (0, 0)
+        }
       } else {
         double lat = 0, lon = 0;
         for (final a in anchors) {
@@ -637,6 +673,12 @@ class _MapScreenState extends State<MapScreen> {
           lon += a.longitude;
         }
         position = LatLng(lat / anchors.length, lon / anchors.length);
+        if (!_checkLocationPlausibility(
+          position.latitude,
+          position.longitude,
+        )) {
+          continue; // discard implausible guesses near (0, 0
+        }
       }
       result.add(
         _GuessedLocation(
@@ -710,40 +752,61 @@ class _MapScreenState extends State<MapScreen> {
         .toList();
   }
 
-  Marker _buildGuessedMarker(_GuessedLocation guess) {
+  List<Marker> _buildGuessedMarker(
-    final color = _getNodeColor(guess.contact.type);
+    List<_GuessedLocation> guessed, {
-    return Marker(
+    required bool showLabels,
-      point: guess.position,
+  }) {
-      width: 35,
+    final markers = <Marker>[];
-      height: 35,
+
-      child: GestureDetector(
+    for (final guess in guessed) {
-        onTap: () => _showNodeInfo(
+      final color = _getNodeColor(guess.contact.type);
-          context,
+      final marker = Marker(
-          guess.contact,
+        point: guess.position,
-          guessedPosition: guess.position,
+        width: 35,
-        ),
+        height: 35,
-        child: Container(
+        child: GestureDetector(
-          padding: const EdgeInsets.all(4),
+          onTap: () => _showNodeInfo(
-          decoration: BoxDecoration(
+            context,
-            color: color.withValues(alpha: guess.highConfidence ? 0.55 : 0.30),
+            guess.contact,
-            shape: BoxShape.circle,
+            guessedPosition: guess.position,
-            border: Border.all(color: Colors.white, width: 2),
+          ),
-            boxShadow: [
+          child: Container(
-              BoxShadow(
+            padding: const EdgeInsets.all(4),
-                color: Colors.black.withValues(alpha: 0.3),
+            decoration: BoxDecoration(
-                blurRadius: 4,
+              color: color.withValues(
-                offset: const Offset(0, 2),
+                alpha: guess.highConfidence ? 0.55 : 0.30,
               ),
-            ],
+              shape: BoxShape.circle,
-          ),
+              border: Border.all(color: Colors.white, width: 2),
-          child: const Icon(
+              boxShadow: [
-            Icons.not_listed_location,
+                BoxShadow(
-            color: Colors.white,
+                  color: Colors.black.withValues(alpha: 0.3),
-            size: 20,
+                  blurRadius: 4,
+                  offset: const Offset(0, 2),
+                ),
+              ],
+            ),
+            child: const Icon(
+              Icons.not_listed_location,
+              color: Colors.white,
+              size: 20,
+            ),
           ),
         ),
-      ),
+      );
-    );
+
+      markers.add(marker);
+
+      if (showLabels) {
+        markers.add(
+          _buildNodeLabelMarker(
+            point: guess.position,
+            label: guess.contact.name,
+          ),
+        );
+      }
+    }
+    return markers;
   }
 
   List<Marker> _buildMarkers(
@@ -1203,6 +1266,7 @@ class _MapScreenState extends State<MapScreen> {
     Contact contact, {
     LatLng? guessedPosition,
   }) {
+    final connector = context.read<MeshCoreConnector>();
     showDialog(
       context: context,
       builder: (dialogContext) => AlertDialog(
@@ -1248,6 +1312,9 @@ class _MapScreenState extends State<MapScreen> {
               advTypeChat) // Only show chat button for chat nodes
             TextButton(
               onPressed: () {
+                if (!contact.isActive) {
+                  connector.importDiscoveredContact(contact);
+                }
                 Navigator.pop(dialogContext);
                 Navigator.push(
                   context,
@@ -1261,6 +1328,9 @@ class _MapScreenState extends State<MapScreen> {
           if (contact.type == advTypeRepeater)
             TextButton(
               onPressed: () {
+                if (!contact.isActive) {
+                  connector.importDiscoveredContact(contact);
+                }
                 Navigator.pop(dialogContext);
                 _showRepeaterLogin(context, contact);
               },
@@ -1269,6 +1339,9 @@ class _MapScreenState extends State<MapScreen> {
           if (contact.type == advTypeRoom)
             TextButton(
               onPressed: () {
+                if (!contact.isActive) {
+                  connector.importDiscoveredContact(contact);
+                }
                 Navigator.pop(dialogContext);
                 _showRoomLogin(context, contact);
               },
@@ -1436,6 +1509,23 @@ class _MapScreenState extends State<MapScreen> {
                 );
               },
             ),
+            ListTile(
+              leading: const Icon(Icons.my_location),
+              title: Text(context.l10n.map_setAsMyLocation),
+              onTap: () async {
+                final messenger = ScaffoldMessenger.of(context);
+                final successMsg = context.l10n.settings_locationUpdated;
+                Navigator.pop(sheetContext);
+                if (!connector.isConnected) return;
+                await connector.setNodeLocation(
+                  lat: position.latitude,
+                  lon: position.longitude,
+                );
+                await connector.refreshDeviceInfo();
+                if (!mounted) return;
+                messenger.showSnackBar(SnackBar(content: Text(successMsg)));
+              },
+            ),
             ListTile(
               leading: const Icon(Icons.close),
               title: Text(context.l10n.common_cancel),
@@ -1745,6 +1835,14 @@ class _MapScreenState extends State<MapScreen> {
                     },
                     contentPadding: EdgeInsets.zero,
                   ),
+                  CheckboxListTile(
+                    title: Text(context.l10n.map_showDiscoveryContacts),
+                    value: settings.mapShowDiscoveryContacts,
+                    onChanged: (value) {
+                      service.setMapShowDiscoveryContacts(value ?? true);
+                    },
+                    contentPadding: EdgeInsets.zero,
+                  ),
                   const SizedBox(height: 16),
                   Text(
                     context.l10n.map_keyPrefix,

lib/screens/neighbors_screen.dart

@@ -124,12 +124,14 @@ class _NeighborsScreenState extends State<NeighborsScreen> {
 
   void _handleNeighborsResponse(MeshCoreConnector connector, Uint8List frame) {
     final buffer = BufferReader(frame);
+    final contacts = <Contact>[
+      ...connector.contacts,
+      ...connector.discoveredContacts,
+    ];
     try {
       final neighborCount = buffer.readUInt16LE();
       final parsedNeighbors = parseNeighborsData(buffer, buffer.readUInt16LE());
-      connector.contacts.where((c) => c.type == advTypeRepeater).forEach((
+      contacts.where((c) => c.type == advTypeRepeater).forEach((repeater) {
-        repeater,
-      ) {
         for (var neighborData in parsedNeighbors) {
           final publicKey = neighborData['publicKey'];
           if (listEquals(

lib/screens/path_trace_map.dart

@@ -114,14 +114,37 @@ class _PathTraceMapScreenState extends State<PathTraceMapScreen> {
     super.dispose();
   }
 
-  Uint8List addReturnPath(Uint8List pathBytes) {
+  Uint8List buildPath(Uint8List pathBytes) {
-    Uint8List? traceBytes;
+    Uint8List traceBytes;
-    final len = (pathBytes.length + pathBytes.length - 1);
+
-    traceBytes = Uint8List(len);
+    if (pathBytes.isEmpty) {
-    for (int i = 0; i < pathBytes.length; i++) {
+      traceBytes = Uint8List(1);
-      traceBytes[i] = pathBytes[i];
+      traceBytes[0] = widget.targetContact?.publicKey[0] ?? 0;
-      if (i < pathBytes.length - 1) {
+      return traceBytes;
-        traceBytes[len - 1 - i] = pathBytes[i];
+    }
+
+    if (widget.targetContact?.type == advTypeRepeater ||
+        widget.targetContact?.type == advTypeRoom) {
+      final len = (pathBytes.length + pathBytes.length + 1);
+      traceBytes = Uint8List(len);
+      traceBytes[pathBytes.length] = widget.targetContact?.publicKey[0] ?? 0;
+      for (int i = 0; i < pathBytes.length; i++) {
+        traceBytes[i] = pathBytes[i];
+        if (i < pathBytes.length) {
+          traceBytes[len - 1 - i] = pathBytes[i];
+        }
+      }
+    } else {
+      if (pathBytes.length < 2) {
+        return pathBytes[0] == 0 ? Uint8List(0) : pathBytes;
+      }
+      final len = (pathBytes.length + pathBytes.length - 1);
+      traceBytes = Uint8List(len);
+      for (int i = 0; i < pathBytes.length; i++) {
+        traceBytes[i] = pathBytes[i];
+        if (i < pathBytes.length - 1) {
+          traceBytes[len - 1 - i] = pathBytes[i];
+        }
       }
     }
     return traceBytes;
@@ -142,11 +165,16 @@ class _PathTraceMapScreenState extends State<PathTraceMapScreen> {
         : widget.path;
 
     if (widget.flipPathRound) {
-      path = addReturnPath(pathTmp);
+      path = buildPath(pathTmp);
     } else {
       path = pathTmp;
     }
 
+    appLogger.info(
+      'Initiating path trace with path: ${_formatPathPrefixes(path)}',
+      tag: 'PathTraceMapScreen',
+    );
+
     final connector = Provider.of<MeshCoreConnector>(context, listen: false);
     final frame = buildTraceReq(
       DateTime.now().millisecondsSinceEpoch ~/ 1000,
@@ -235,10 +263,11 @@ class _PathTraceMapScreenState extends State<PathTraceMapScreen> {
           .toList();
 
       Map<int, Contact> pathContacts = {};
-
+      final contacts = <Contact>[
-      connector.contacts.where((c) => c.type != advTypeChat).forEach((
+        ...connector.contacts,
-        repeater,
+        ...connector.discoveredContacts,
-      ) {
+      ];
+      contacts.where((c) => c.type != advTypeChat).forEach((repeater) {
         for (var repeaterData in pathData) {
           if (listEquals(
             repeater.publicKey.sublist(0, 1),

lib/screens/scanner_screen.dart

@@ -10,6 +10,7 @@ import '../utils/app_logger.dart';
 import '../widgets/adaptive_app_bar_title.dart';
 import '../widgets/device_tile.dart';
 import 'contacts_screen.dart';
+import 'tcp_screen.dart';
 import 'usb_screen.dart';
 
 /// Screen for scanning and connecting to MeshCore devices
@@ -125,61 +126,78 @@ class _ScannerScreenState extends State<ScannerScreen> {
               connector.state == MeshCoreConnectionState.scanning;
           final isBluetoothOff = _bluetoothState == BluetoothAdapterState.off;
           final usbSupported = PlatformInfo.supportsUsbSerial;
+          final tcpSupported = !PlatformInfo.isWeb;
 
           return SafeArea(
             top: false,
             minimum: const EdgeInsets.fromLTRB(16, 8, 16, 16),
-            child: Row(
+            child: FittedBox(
-              mainAxisAlignment: MainAxisAlignment.end,
+              fit: BoxFit.scaleDown,
-              children: [
+              alignment: Alignment.centerRight,
-                if (usbSupported)
+              child: Row(
+                mainAxisAlignment: MainAxisAlignment.end,
+                children: [
+                  if (usbSupported)
+                    FloatingActionButton.extended(
+                      onPressed: () {
+                        appLogger.info(
+                          'USB selected, opening UsbScreen',
+                          tag: 'ScannerScreen',
+                        );
+                        Navigator.of(context).push(
+                          MaterialPageRoute(builder: (_) => const UsbScreen()),
+                        );
+                      },
+                      heroTag: 'scanner_usb_action',
+                      icon: const Icon(Icons.usb),
+                      label: Text(context.l10n.connectionChoiceUsbLabel),
+                    ),
+                  if (usbSupported) const SizedBox(width: 12),
+                  if (tcpSupported)
+                    FloatingActionButton.extended(
+                      onPressed: () {
+                        Navigator.of(context).push(
+                          MaterialPageRoute(builder: (_) => const TcpScreen()),
+                        );
+                      },
+                      heroTag: 'scanner_tcp_action',
+                      icon: const Icon(Icons.lan),
+                      label: Text(context.l10n.connectionChoiceTcpLabel),
+                    ),
+                  if (tcpSupported) const SizedBox(width: 12),
                   FloatingActionButton.extended(
-                    onPressed: () {
+                    heroTag: 'scanner_ble_action',
-                      appLogger.info(
+                    onPressed: isBluetoothOff
-                        'USB selected, opening UsbScreen',
+                        ? null
-                        tag: 'ScannerScreen',
+                        : () {
-                      );
+                            if (isScanning) {
-                      Navigator.of(context).push(
+                              connector.stopScan();
-                        MaterialPageRoute(builder: (_) => const UsbScreen()),
+                            } else {
-                      );
+                              unawaited(
-                    },
+                                connector.startScan().catchError((e) {
-                    heroTag: 'scanner_usb_action',
+                                  appLogger.warn(
-                    icon: const Icon(Icons.usb),
+                                    'startScan error: $e',
-                    label: Text(context.l10n.connectionChoiceUsbLabel),
+                                    tag: 'ScannerScreen',
+                                  );
+                                }),
+                              );
+                            }
+                          },
+                    icon: isScanning
+                        ? const SizedBox(
+                            width: 20,
+                            height: 20,
+                            child: CircularProgressIndicator(strokeWidth: 2),
+                          )
+                        : const Icon(Icons.bluetooth_searching),
+                    label: Text(
+                      isScanning
+                          ? context.l10n.scanner_stop
+                          : context.l10n.scanner_scan,
+                    ),
                   ),
-                if (usbSupported) const SizedBox(width: 12),
+                ],
-                FloatingActionButton.extended(
+              ),
-                  heroTag: 'scanner_ble_action',
-                  onPressed: isBluetoothOff
-                      ? null
-                      : () {
-                          if (isScanning) {
-                            connector.stopScan();
-                          } else {
-                            unawaited(
-                              connector.startScan().catchError((e) {
-                                appLogger.warn(
-                                  'startScan error: $e',
-                                  tag: 'ScannerScreen',
-                                );
-                              }),
-                            );
-                          }
-                        },
-                  icon: isScanning
-                      ? const SizedBox(
-                          width: 20,
-                          height: 20,
-                          child: CircularProgressIndicator(strokeWidth: 2),
-                        )
-                      : const Icon(Icons.bluetooth_searching),
-                  label: Text(
-                    isScanning
-                        ? context.l10n.scanner_stop
-                        : context.l10n.scanner_scan,
-                  ),
-                ),
-              ],
             ),
           );
         },

lib/screens/tcp_screen.dart

@@ -0,0 +1,282 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import '../connector/meshcore_connector.dart';
+import '../l10n/l10n.dart';
+import '../utils/platform_info.dart';
+import '../widgets/adaptive_app_bar_title.dart';
+import 'contacts_screen.dart';
+import 'usb_screen.dart';
+
+class TcpScreen extends StatefulWidget {
+  const TcpScreen({super.key});
+
+  @override
+  State<TcpScreen> createState() => _TcpScreenState();
+}
+
+class _TcpScreenState extends State<TcpScreen> {
+  late final TextEditingController _hostController;
+  late final TextEditingController _portController;
+  late final MeshCoreConnector _connector;
+  late final VoidCallback _connectionListener;
+  bool _navigatedToContacts = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _hostController = TextEditingController();
+    _portController = TextEditingController(text: '5000');
+    _connector = context.read<MeshCoreConnector>();
+
+    _connectionListener = () {
+      if (!mounted) return;
+      if (_connector.state == MeshCoreConnectionState.disconnected) {
+        _navigatedToContacts = false;
+      }
+      if (_connector.state == MeshCoreConnectionState.connected &&
+          _connector.isTcpTransportConnected &&
+          !_navigatedToContacts) {
+        _navigatedToContacts = true;
+        Navigator.of(context).pushReplacement(
+          MaterialPageRoute(builder: (_) => const ContactsScreen()),
+        );
+      }
+    };
+    _connector.addListener(_connectionListener);
+  }
+
+  @override
+  void dispose() {
+    _hostController.dispose();
+    _portController.dispose();
+    _connector.removeListener(_connectionListener);
+    if (!_navigatedToContacts &&
+        _connector.activeTransport == MeshCoreTransportType.tcp &&
+        _connector.state != MeshCoreConnectionState.disconnected) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        unawaited(_connector.disconnect(manual: true));
+      });
+    }
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back),
+          onPressed: () => Navigator.of(context).maybePop(),
+        ),
+        title: AdaptiveAppBarTitle(context.l10n.tcpScreenTitle),
+        centerTitle: true,
+      ),
+      body: SafeArea(
+        top: false,
+        child: Consumer<MeshCoreConnector>(
+          builder: (context, connector, child) {
+            final isConnecting =
+                connector.state == MeshCoreConnectionState.connecting &&
+                connector.activeTransport == MeshCoreTransportType.tcp;
+            final isButtonDisabled =
+                isConnecting ||
+                connector.state == MeshCoreConnectionState.scanning;
+            return Column(
+              children: [
+                _buildStatusBar(context, connector),
+                Padding(
+                  padding: const EdgeInsets.all(16),
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.stretch,
+                    children: [
+                      TextField(
+                        controller: _hostController,
+                        decoration: InputDecoration(
+                          labelText: context.l10n.tcpHostLabel,
+                          hintText: context.l10n.tcpHostHint,
+                          border: const OutlineInputBorder(),
+                        ),
+                        enabled: !isConnecting,
+                        keyboardType: TextInputType.url,
+                      ),
+                      const SizedBox(height: 12),
+                      TextField(
+                        controller: _portController,
+                        decoration: InputDecoration(
+                          labelText: context.l10n.tcpPortLabel,
+                          hintText: context.l10n.tcpPortHint,
+                          border: const OutlineInputBorder(),
+                        ),
+                        enabled: !isConnecting,
+                        keyboardType: TextInputType.number,
+                      ),
+                      const SizedBox(height: 16),
+                      FilledButton.icon(
+                        key: const Key('tcp_connect_button'),
+                        onPressed: isButtonDisabled ? null : _connectTcp,
+                        icon: isConnecting
+                            ? const SizedBox(
+                                width: 18,
+                                height: 18,
+                                child: CircularProgressIndicator(
+                                  strokeWidth: 2,
+                                ),
+                              )
+                            : const Icon(Icons.lan),
+                        label: Text(
+                          isConnecting
+                              ? context.l10n.scanner_connecting
+                              : context.l10n.common_connect,
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            );
+          },
+        ),
+      ),
+      bottomNavigationBar: SafeArea(
+        top: false,
+        minimum: const EdgeInsets.fromLTRB(16, 8, 16, 16),
+        child: FittedBox(
+          fit: BoxFit.scaleDown,
+          alignment: Alignment.centerRight,
+          child: Row(
+            mainAxisAlignment: MainAxisAlignment.end,
+            children: [
+              if (PlatformInfo.supportsUsbSerial)
+                FloatingActionButton.extended(
+                  onPressed: () {
+                    Navigator.of(context).pushReplacement(
+                      MaterialPageRoute(builder: (_) => const UsbScreen()),
+                    );
+                  },
+                  heroTag: 'tcp_usb_action',
+                  extendedPadding: const EdgeInsets.symmetric(horizontal: 12),
+                  icon: const Icon(Icons.usb),
+                  label: Text(context.l10n.connectionChoiceUsbLabel),
+                ),
+              if (PlatformInfo.supportsUsbSerial) const SizedBox(width: 12),
+              FloatingActionButton.extended(
+                onPressed: () {
+                  Navigator.of(context).maybePop();
+                },
+                heroTag: 'tcp_ble_action',
+                extendedPadding: const EdgeInsets.symmetric(horizontal: 12),
+                icon: const Icon(Icons.bluetooth),
+                label: Text(context.l10n.connectionChoiceBluetoothLabel),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildStatusBar(BuildContext context, MeshCoreConnector connector) {
+    final l10n = context.l10n;
+    String statusText;
+    Color statusColor;
+
+    if (connector.isTcpTransportConnected) {
+      statusText = l10n.scanner_connectedTo(
+        connector.activeTcpEndpoint ?? 'TCP',
+      );
+      statusColor = Colors.green;
+    } else if (connector.state == MeshCoreConnectionState.connecting &&
+        connector.activeTransport == MeshCoreTransportType.tcp) {
+      statusText = l10n.tcpStatus_connectingTo(
+        '${_hostController.text}:${_portController.text}',
+      );
+      statusColor = Colors.orange;
+    } else if (connector.state == MeshCoreConnectionState.disconnecting &&
+        connector.activeTransport == MeshCoreTransportType.tcp) {
+      statusText = l10n.scanner_disconnecting;
+      statusColor = Colors.orange;
+    } else {
+      statusText = l10n.tcpStatus_notConnected;
+      statusColor = Colors.grey;
+    }
+
+    return Container(
+      width: double.infinity,
+      padding: const EdgeInsets.symmetric(vertical: 8, horizontal: 16),
+      color: statusColor.withValues(alpha: 0.1),
+      child: Row(
+        children: [
+          Icon(Icons.circle, size: 12, color: statusColor),
+          const SizedBox(width: 8),
+          Expanded(
+            child: FittedBox(
+              fit: BoxFit.scaleDown,
+              alignment: Alignment.centerLeft,
+              child: Text(
+                statusText,
+                style: TextStyle(
+                  color: statusColor,
+                  fontWeight: FontWeight.w500,
+                ),
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Future<void> _connectTcp() async {
+    if (_connector.state == MeshCoreConnectionState.connecting ||
+        _connector.state == MeshCoreConnectionState.connected ||
+        _connector.state == MeshCoreConnectionState.disconnecting) {
+      return;
+    }
+
+    final host = _hostController.text.trim();
+    final parsedPort = int.tryParse(_portController.text.trim());
+    if (host.isEmpty) {
+      _showError(context.l10n.tcpErrorHostRequired);
+      return;
+    }
+    if (parsedPort == null || parsedPort < 1 || parsedPort > 65535) {
+      _showError(context.l10n.tcpErrorPortInvalid);
+      return;
+    }
+
+    try {
+      await _connector.connectTcp(host: host, port: parsedPort);
+    } catch (error) {
+      if (!mounted) return;
+      _showError(_friendlyErrorMessage(error));
+    }
+  }
+
+  void _showError(String message) {
+    if (!mounted) return;
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(content: Text(message), backgroundColor: Colors.red),
+    );
+  }
+
+  String _friendlyErrorMessage(Object error) {
+    if (error is UnsupportedError) {
+      return context.l10n.tcpErrorUnsupported;
+    }
+    if (error is TimeoutException) {
+      return context.l10n.tcpErrorTimedOut;
+    }
+    if (error is StateError) {
+      return context.l10n.tcpConnectionFailed(error.message);
+    }
+    if (error is ArgumentError) {
+      return context.l10n.tcpConnectionFailed(
+        error.message?.toString() ?? error.toString(),
+      );
+    }
+    return context.l10n.tcpConnectionFailed(error.toString());
+  }
+}

lib/screens/usb_screen.dart

@@ -12,6 +12,7 @@ import '../utils/usb_port_labels.dart';
 import '../widgets/adaptive_app_bar_title.dart';
 import 'contacts_screen.dart';
 import 'scanner_screen.dart';
+import 'tcp_screen.dart';
 
 class UsbScreen extends StatefulWidget {
   const UsbScreen({super.key});
@@ -107,45 +108,69 @@ class _UsbScreenState extends State<UsbScreen> {
       bottomNavigationBar: Consumer<MeshCoreConnector>(
         builder: (context, connector, child) {
           final isLoading = _isLoadingPorts;
-          final showBle =
+          final showBle = true;
-              PlatformInfo.isWeb ||
+          final showTcp = !PlatformInfo.isWeb;
-              PlatformInfo.isAndroid ||
-              PlatformInfo.isIOS;
 
           return SafeArea(
             top: false,
             minimum: const EdgeInsets.fromLTRB(16, 8, 16, 16),
-            child: Row(
+            child: FittedBox(
-              mainAxisAlignment: MainAxisAlignment.end,
+              fit: BoxFit.scaleDown,
-              children: [
+              alignment: Alignment.centerRight,
-                if (showBle)
+              child: Row(
-                  FloatingActionButton.extended(
+                mainAxisAlignment: MainAxisAlignment.end,
-                    onPressed: () {
+                children: [
-                      Navigator.of(context).pushReplacement(
+                  if (showTcp)
-                        MaterialPageRoute(
+                    FloatingActionButton.extended(
-                          builder: (_) => const ScannerScreen(),
+                      onPressed: () {
-                        ),
+                        Navigator.of(context).pushReplacement(
-                      );
+                          MaterialPageRoute(builder: (_) => const TcpScreen()),
-                    },
+                        );
-                    heroTag: 'usb_ble_action',
+                      },
-                    icon: const Icon(Icons.bluetooth),
+                      heroTag: 'usb_tcp_action',
-                    label: Text(context.l10n.connectionChoiceBluetoothLabel),
+                      extendedPadding: const EdgeInsets.symmetric(
-                  ),
+                        horizontal: 12,
-                if (showBle) const SizedBox(width: 12),
+                      ),
-                if (!_supportsHotPlug)
+                      icon: const Icon(Icons.lan),
-                  FloatingActionButton.extended(
+                      label: Text(context.l10n.connectionChoiceTcpLabel),
-                    onPressed: isLoading ? null : _loadPorts,
+                    ),
-                    heroTag: 'usb_refresh_action',
+                  if (showTcp && showBle) const SizedBox(width: 12),
-                    icon: isLoading
+                  if (showBle)
-                        ? const SizedBox(
+                    FloatingActionButton.extended(
-                            width: 20,
+                      onPressed: () {
-                            height: 20,
+                        Navigator.of(context).pushReplacement(
-                            child: CircularProgressIndicator(strokeWidth: 2),
+                          MaterialPageRoute(
-                          )
+                            builder: (_) => const ScannerScreen(),
-                        : const Icon(Icons.refresh),
+                          ),
-                    label: Text(context.l10n.repeater_refresh),
+                        );
-                  ),
+                      },
-              ],
+                      heroTag: 'usb_ble_action',
+                      extendedPadding: const EdgeInsets.symmetric(
+                        horizontal: 12,
+                      ),
+                      icon: const Icon(Icons.bluetooth),
+                      label: Text(context.l10n.connectionChoiceBluetoothLabel),
+                    ),
+                  if ((showTcp || showBle) && !_supportsHotPlug)
+                    const SizedBox(width: 12),
+                  if (!_supportsHotPlug)
+                    FloatingActionButton.extended(
+                      onPressed: isLoading ? null : _loadPorts,
+                      heroTag: 'usb_refresh_action',
+                      extendedPadding: const EdgeInsets.symmetric(
+                        horizontal: 12,
+                      ),
+                      icon: isLoading
+                          ? const SizedBox(
+                              width: 20,
+                              height: 20,
+                              child: CircularProgressIndicator(strokeWidth: 2),
+                            )
+                          : const Icon(Icons.usb),
+                      label: Text(context.l10n.scanner_scan),
+                    ),
+                ],
+              ),
             ),
           );
         },
@@ -192,9 +217,18 @@ class _UsbScreenState extends State<UsbScreen> {
         children: [
           Icon(Icons.circle, size: 12, color: statusColor),
           const SizedBox(width: 8),
-          Text(
+          Expanded(
-            statusText,
+            child: FittedBox(
-            style: TextStyle(color: statusColor, fontWeight: FontWeight.w500),
+              fit: BoxFit.scaleDown,
+              alignment: Alignment.centerLeft,
+              child: Text(
+                statusText,
+                style: TextStyle(
+                  color: statusColor,
+                  fontWeight: FontWeight.w500,
+                ),
+              ),
+            ),
           ),
         ],
       ),

lib/services/app_settings_service.dart

@@ -134,6 +134,10 @@ class AppSettingsService extends ChangeNotifier {
     appLogger.setEnabled(value);
   }
 
+  Future<void> setMapShowDiscoveryContacts(bool value) async {
+    await updateSettings(_settings.copyWith(mapShowDiscoveryContacts: value));
+  }
+
   Future<void> setBatteryChemistryForDevice(
     String deviceId,
     String chemistry,

lib/services/message_retry_service.dart

@@ -44,6 +44,12 @@ class MessageRetryService extends ChangeNotifier {
       []; // Rolling buffer of recent ACK hashes
   final Map<String, List<String>> _pendingMessageQueuePerContact =
       {}; // contactPubKeyHex → FIFO queue of messageIds (DEPRECATED - will be removed)
+  final Map<String, List<String>> _sendQueue =
+      {}; // contactPubKeyHex → ordered list of messageIds awaiting send
+  final Set<String> _activeMessages =
+      {}; // messageIds currently in-flight (sent/retrying)
+  final Set<String> _resolvedMessages =
+      {}; // messageIds already resolved (prevents double _onMessageResolved)
   final Map<String, String> _expectedHashToMessageId =
       {}; // expectedAckHashHex → messageId (for matching RESP_CODE_SENT by hash)
 
@@ -52,12 +58,13 @@ class MessageRetryService extends ChangeNotifier {
   Function(Message)? _updateMessageCallback;
   Function(Contact)? _clearContactPathCallback;
   Function(Contact, Uint8List, int)? _setContactPathCallback;
-  Function(int, int)? _calculateTimeoutCallback;
+  Function(int, int, {String? contactKey})? _calculateTimeoutCallback;
   Uint8List? Function()? _getSelfPublicKeyCallback;
   String Function(Contact, String)? _prepareContactOutboundTextCallback;
   AppSettingsService? _appSettingsService;
   AppDebugLogService? _debugLogService;
   Function(String, PathSelection, bool, int?)? _recordPathResultCallback;
+  Function(String, int, int, int)? _onDeliveryObservedCallback;
 
   MessageRetryService();
 
@@ -67,12 +74,20 @@ class MessageRetryService extends ChangeNotifier {
     required Function(Message) updateMessageCallback,
     Function(Contact)? clearContactPathCallback,
     Function(Contact, Uint8List, int)? setContactPathCallback,
-    Function(int pathLength, int messageBytes)? calculateTimeoutCallback,
+    Function(int pathLength, int messageBytes, {String? contactKey})?
+    calculateTimeoutCallback,
     Uint8List? Function()? getSelfPublicKeyCallback,
     String Function(Contact, String)? prepareContactOutboundTextCallback,
     AppSettingsService? appSettingsService,
     AppDebugLogService? debugLogService,
     Function(String, PathSelection, bool, int?)? recordPathResultCallback,
+    Function(
+      String contactKey,
+      int pathLength,
+      int messageBytes,
+      int tripTimeMs,
+    )?
+    onDeliveryObservedCallback,
   }) {
     _sendMessageCallback = sendMessageCallback;
     _addMessageCallback = addMessageCallback;
@@ -85,6 +100,7 @@ class MessageRetryService extends ChangeNotifier {
     _appSettingsService = appSettingsService;
     _debugLogService = debugLogService;
     _recordPathResultCallback = recordPathResultCallback;
+    _onDeliveryObservedCallback = onDeliveryObservedCallback;
   }
 
   /// Compute expected ACK hash using same algorithm as firmware:
@@ -156,7 +172,49 @@ class MessageRetryService extends ChangeNotifier {
       _addMessageCallback!(contact.publicKeyHex, message);
     }
 
-    await _attemptSend(messageId);
+    // Queue per contact — only one message in-flight at a time to avoid
+    // overflowing the firmware's 8-entry expected_ack_table.
+    final contactKey = contact.publicKeyHex;
+    _sendQueue[contactKey] ??= [];
+    _sendQueue[contactKey]!.add(messageId);
+
+    if (!_activeMessages.any(
+      (id) => _pendingContacts[id]?.publicKeyHex == contactKey,
+    )) {
+      _sendNextForContact(contactKey);
+    }
+  }
+
+  void _sendNextForContact(String contactKey) {
+    final queue = _sendQueue[contactKey];
+    if (queue == null) return;
+
+    // Drain stale entries iteratively instead of recursing.
+    while (queue.isNotEmpty) {
+      final messageId = queue.removeAt(0);
+      if (_pendingMessages.containsKey(messageId)) {
+        _activeMessages.add(messageId);
+        _attemptSend(messageId).catchError((e) {
+          debugPrint('_attemptSend threw for $messageId: $e');
+          final msg = _pendingMessages[messageId];
+          if (msg != null) {
+            final failed = msg.copyWith(status: MessageStatus.failed);
+            _pendingMessages[messageId] = failed;
+            _updateMessageCallback?.call(failed);
+          }
+          _onMessageResolved(messageId, contactKey);
+        });
+        return;
+      }
+      // Message was cancelled/cleaned up while queued — try next
+    }
+  }
+
+  void _onMessageResolved(String messageId, String contactKey) {
+    if (_resolvedMessages.contains(messageId)) return;
+    _resolvedMessages.add(messageId);
+    _activeMessages.remove(messageId);
+    _sendNextForContact(contactKey);
   }
 
   Future<void> _attemptSend(String messageId) async {
@@ -169,13 +227,11 @@ class MessageRetryService extends ChangeNotifier {
     // Use the path that was captured when the message was first sent
     if (_setContactPathCallback != null && _clearContactPathCallback != null) {
       if (message.pathLength != null && message.pathLength! < 0) {
-        // Flood mode - clear the path
         debugPrint(
           'Setting flood mode for retry attempt ${message.retryCount}',
         );
-        _clearContactPathCallback!(contact);
+        await _clearContactPathCallback!(contact);
       } else if (message.pathLength != null && message.pathLength! >= 0) {
-        // Specific path (including direct neighbor with pathLength=0)
         final pathStr = message.pathBytes.isEmpty
             ? 'direct'
             : message.pathBytes
@@ -192,6 +248,24 @@ class MessageRetryService extends ChangeNotifier {
       }
     }
 
+    // Re-validate after async gap — a timer or ACK could have resolved/retried
+    // this message while we were awaiting the path callback.
+    final currentMessage = _pendingMessages[messageId];
+    if (currentMessage == null || _resolvedMessages.contains(messageId)) {
+      debugPrint(
+        '_attemptSend: message $messageId resolved during path sync, aborting',
+      );
+      return;
+    }
+    // If the message was retried by a timer during our await, the retryCount
+    // will have advanced. Only proceed if it still matches the attempt we started.
+    if (currentMessage.retryCount != message.retryCount) {
+      debugPrint(
+        '_attemptSend: message $messageId retryCount changed during path sync, aborting',
+      );
+      return;
+    }
+
     final attempt = message.retryCount.clamp(0, 3);
     final timestampSeconds = message.timestamp.millisecondsSinceEpoch ~/ 1000;
 
@@ -231,6 +305,15 @@ class MessageRetryService extends ChangeNotifier {
 
     if (_sendMessageCallback != null) {
       _sendMessageCallback!(contact, message.text, attempt, timestampSeconds);
+    } else {
+      // No send callback — message would be stuck forever. Fail it immediately.
+      debugPrint(
+        '_attemptSend: no sendMessageCallback, failing message $messageId',
+      );
+      final failedMessage = message.copyWith(status: MessageStatus.failed);
+      _pendingMessages[messageId] = failedMessage;
+      _updateMessageCallback?.call(failedMessage);
+      _onMessageResolved(messageId, contact.publicKeyHex);
     }
   }
 
@@ -281,6 +364,7 @@ class MessageRetryService extends ChangeNotifier {
     }
 
     // FALLBACK: Old queue-based matching (for messages sent before hash computation was added)
+    // Only match within a single contact's queue to avoid cross-contact mismatches.
     if (messageId == null && allowQueueFallback) {
       _debugLogService?.warn(
         'RESP_CODE_SENT: ACK hash $ackHashHex not found in hash table, falling back to queue',
@@ -290,13 +374,16 @@ class MessageRetryService extends ChangeNotifier {
         'Hash-based match failed for $ackHashHex, falling back to queue-based matching',
       );
 
-      for (var entry in _pendingMessageQueuePerContact.entries) {
+      // Search all contact queues so concurrent chats don't miss matches.
+      final queuesToSearch = _pendingMessageQueuePerContact;
+
+      for (var entry in queuesToSearch.entries) {
         final contactKey = entry.key;
         final queue = entry.value;
 
-        if (queue.isNotEmpty) {
+        // Drain stale entries until we find a valid one or exhaust the queue.
+        while (queue.isNotEmpty) {
           final candidateMessageId = queue.removeAt(0);
-
           if (_pendingMessages.containsKey(candidateMessageId)) {
             messageId = candidateMessageId;
             contact = _pendingContacts[candidateMessageId];
@@ -304,21 +391,10 @@ class MessageRetryService extends ChangeNotifier {
               'Queue-based match (fallback): $ackHashHex → message $messageId for $contactKey',
             );
             break;
-          } else {
-            debugPrint('Dequeued stale message $candidateMessageId - skipping');
-            if (queue.isNotEmpty) {
-              final nextMessageId = queue.removeAt(0);
-              if (_pendingMessages.containsKey(nextMessageId)) {
-                messageId = nextMessageId;
-                contact = _pendingContacts[nextMessageId];
-                debugPrint(
-                  'Queue-based match (fallback): $ackHashHex → message $messageId',
-                );
-                break;
-              }
-            }
           }
+          debugPrint('Dequeued stale message $candidateMessageId - skipping');
         }
+        if (messageId != null) break;
       }
     }
 
@@ -357,25 +433,33 @@ class MessageRetryService extends ChangeNotifier {
       );
     }
 
-    // Use device-provided timeout, or calculate from radio settings if timeout is 0 or invalid
+    // Calculate timeout: prefer ML prediction, then device-provided, then physics fallback
+    int pathLengthValue;
+    if (selection != null) {
+      pathLengthValue = selection.useFlood ? -1 : selection.hopCount;
+      if (pathLengthValue < 0) pathLengthValue = contact.pathLength;
+    } else if (message.pathLength != null) {
+      pathLengthValue = message.pathLength!;
+    } else {
+      pathLengthValue = contact.pathLength;
+    }
+
     int actualTimeout = timeoutMs;
-    if (timeoutMs <= 0 && _calculateTimeoutCallback != null) {
+    if (_calculateTimeoutCallback != null) {
-      int pathLengthValue;
+      final calculated = _calculateTimeoutCallback!(
-      if (selection != null) {
-        pathLengthValue = selection.useFlood ? -1 : selection.hopCount;
-        if (pathLengthValue < 0) pathLengthValue = contact.pathLength;
-      } else if (message.pathLength != null) {
-        pathLengthValue = message.pathLength!;
-      } else {
-        pathLengthValue = contact.pathLength;
-      }
-      actualTimeout = _calculateTimeoutCallback!(
         pathLengthValue,
         message.text.length,
+        contactKey: contact.publicKeyHex,
       );
-      debugPrint(
+      // calculateTimeout tries ML first, falls back to physics.
-        'Using calculated timeout: ${actualTimeout}ms for path length $pathLengthValue',
+      // Use calculated value if device didn't provide one, or if ML
-      );
+      // produced a tighter prediction than the device's estimate.
+      if (timeoutMs <= 0 || calculated < timeoutMs) {
+        actualTimeout = calculated;
+        debugPrint(
+          'Using calculated timeout: ${actualTimeout}ms for path length $pathLengthValue',
+        );
+      }
     }
 
     final updatedMessage = message.copyWith(
@@ -463,22 +547,7 @@ class MessageRetryService extends ChangeNotifier {
     } else {
       // Max retries reached - mark as failed
       final failedMessage = message.copyWith(status: MessageStatus.failed);
-
+      _pendingMessages[messageId] = failedMessage;
-      // Move ACK hashes to history before removing
-      _moveAckHashesToHistory(messageId);
-
-      _pendingMessages.remove(messageId);
-      _pendingContacts.remove(messageId);
-      _pendingPathSelections.remove(messageId);
-      _timeoutTimers[messageId]?.cancel();
-      _timeoutTimers.remove(messageId);
-
-      // Clean up the queue entry for this contact
-      _pendingMessageQueuePerContact[contact.publicKeyHex]?.remove(messageId);
-      if (_pendingMessageQueuePerContact[contact.publicKeyHex]?.isEmpty ??
-          false) {
-        _pendingMessageQueuePerContact.remove(contact.publicKeyHex);
-      }
 
       // Check if we should clear the path on max retry
       if (_appSettingsService?.settings.clearPathOnMaxRetry == true &&
@@ -499,6 +568,30 @@ class MessageRetryService extends ChangeNotifier {
       }
 
       notifyListeners();
+
+      // Message is done retrying — send next queued message for this contact
+      _onMessageResolved(messageId, contact.publicKeyHex);
+
+      // Keep message in pending maps for 30s grace period so late ACKs
+      // can still match and update the message to delivered.
+      _timeoutTimers[messageId] = Timer(const Duration(seconds: 30), () {
+        _moveAckHashesToHistory(messageId);
+        // Clean up ALL hash mappings for this message
+        _ackHashToMessageId.removeWhere(
+          (_, mapping) => mapping.messageId == messageId,
+        );
+        _expectedHashToMessageId.removeWhere((_, msgId) => msgId == messageId);
+        _pendingMessages.remove(messageId);
+        _pendingContacts.remove(messageId);
+        _pendingPathSelections.remove(messageId);
+        _timeoutTimers.remove(messageId);
+        _resolvedMessages.remove(messageId);
+        final contactKey = contact.publicKeyHex;
+        _pendingMessageQueuePerContact[contactKey]?.remove(messageId);
+        if (_pendingMessageQueuePerContact[contactKey]?.isEmpty ?? false) {
+          _pendingMessageQueuePerContact.remove(contactKey);
+        }
+      });
     }
   }
 
@@ -594,7 +687,15 @@ class MessageRetryService extends ChangeNotifier {
     }
 
     if (matchedMessageId != null) {
-      final message = _pendingMessages[matchedMessageId]!;
+      final message = _pendingMessages[matchedMessageId];
+      if (message == null) {
+        // Message was already cleaned up (e.g. grace period expired)
+        _ackHashToMessageId.remove(ackHashHex);
+        debugPrint(
+          'ACK matched $matchedMessageId but message already cleaned up',
+        );
+        return;
+      }
       final contact = _pendingContacts[matchedMessageId];
       final selection = _pendingPathSelections[matchedMessageId];
 
@@ -616,12 +717,21 @@ class MessageRetryService extends ChangeNotifier {
         tripTimeMs: tripTimeMs,
       );
 
+      // Clean up ALL hash mappings for this message (from all retry attempts)
+      _ackHashToMessageId.removeWhere(
+        (_, mapping) => mapping.messageId == matchedMessageId,
+      );
+      _expectedHashToMessageId.removeWhere(
+        (_, msgId) => msgId == matchedMessageId,
+      );
+
       // Move ACK hashes to history before removing
       _moveAckHashesToHistory(matchedMessageId);
 
       _pendingMessages.remove(matchedMessageId);
       _pendingContacts.remove(matchedMessageId);
       _pendingPathSelections.remove(matchedMessageId);
+      _resolvedMessages.remove(matchedMessageId);
 
       // Clean up the queue entry for this contact (remove any remaining references to this message)
       if (contact != null) {
@@ -646,6 +756,17 @@ class MessageRetryService extends ChangeNotifier {
           true,
           tripTimeMs,
         );
+        if (_onDeliveryObservedCallback != null &&
+            tripTimeMs > 0 &&
+            message.pathLength != null) {
+          _onDeliveryObservedCallback!(
+            contact.publicKeyHex,
+            message.pathLength!,
+            message.text.length,
+            tripTimeMs,
+          );
+        }
+        _onMessageResolved(matchedMessageId, contact.publicKeyHex);
       }
 
       notifyListeners();
@@ -783,6 +904,9 @@ class MessageRetryService extends ChangeNotifier {
     _ackHistory.clear();
     _ackHashToMessageId.clear();
     _pendingMessageQueuePerContact.clear();
+    _sendQueue.clear();
+    _activeMessages.clear();
+    _resolvedMessages.clear();
     super.dispose();
   }
 }

lib/services/notification_service.dart

@@ -232,7 +232,9 @@ class NotificationService {
 
     try {
       await _notifications.show(
-        id: contactId?.hashCode ?? DateTime.now().millisecondsSinceEpoch,
+        id: contactId != null
+            ? 'advert:$contactId'.hashCode
+            : DateTime.now().millisecondsSinceEpoch,
         title: _l10n.notification_newTypeDiscovered(contactType),
         body: contactName,
         notificationDetails: notificationDetails,
@@ -331,6 +333,61 @@ class NotificationService {
     await _notifications.cancel(id: id);
   }
 
+  /// Cancel the notification for a specific contact and update the app badge.
+  Future<void> clearContactNotification(
+    String contactId,
+    int totalUnreadCount,
+  ) async {
+    if (!await _ensureInitialized()) return;
+    await _notifications.cancel(id: contactId.hashCode);
+    await _updateBadge(totalUnreadCount);
+  }
+
+  /// Cancel the notification for a specific channel and update the app badge.
+  Future<void> clearChannelNotification(
+    int channelIndex,
+    int totalUnreadCount,
+  ) async {
+    if (!await _ensureInitialized()) return;
+    await _notifications.cancel(id: channelIndex.hashCode);
+    await _updateBadge(totalUnreadCount);
+  }
+
+  /// Cancel advert notifications for the given contact public key hexes.
+  Future<void> clearAdvertNotifications(List<String> contactIds) async {
+    if (!await _ensureInitialized()) return;
+    for (final id in contactIds) {
+      await _notifications.cancel(id: 'advert:$id'.hashCode);
+    }
+  }
+
+  Future<void> _updateBadge(int count) async {
+    if (PlatformInfo.isIOS || PlatformInfo.isMacOS) {
+      // On Apple platforms, set the badge number directly via a silent update.
+      final darwinDetails = DarwinNotificationDetails(
+        presentAlert: false,
+        presentSound: false,
+        presentBadge: true,
+        badgeNumber: count,
+      );
+      final details = NotificationDetails(
+        iOS: darwinDetails,
+        macOS: darwinDetails,
+      );
+      // Use a fixed ID so each update replaces the previous one.
+      await _notifications.show(
+        id: 'badge_update'.hashCode,
+        title: null,
+        body: null,
+        notificationDetails: details,
+      );
+      // Immediately cancel the silent notification so it doesn't appear in tray.
+      await _notifications.cancel(id: 'badge_update'.hashCode);
+    }
+    // On Android, badge count is derived from active notifications,
+    // so cancelling the specific notification above is sufficient.
+  }
+
   // ─────────────────────────────────────────────────────────────────
   // Public notification methods (rate limiting is enforced automatically)
   // ─────────────────────────────────────────────────────────────────

lib/services/storage_service.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import '../models/delivery_observation.dart';
 import '../models/path_history.dart';
 import '../storage/prefs_manager.dart';
 
@@ -6,6 +7,7 @@ class StorageService {
   static const String _pathHistoryPrefix = 'path_history_';
   static const String _pendingMessagesKey = 'pending_messages';
   static const String _repeaterPasswordsKey = 'repeater_passwords';
+  static const String _deliveryObservationsKey = 'delivery_observations';
 
   Future<void> savePathHistory(
     String contactPubKeyHex,
@@ -122,4 +124,33 @@ class StorageService {
     final prefs = PrefsManager.instance;
     await prefs.remove(_repeaterPasswordsKey);
   }
+
+  Future<void> saveDeliveryObservations(
+    List<DeliveryObservation> observations,
+  ) async {
+    final prefs = PrefsManager.instance;
+    final jsonStr = jsonEncode(observations.map((o) => o.toJson()).toList());
+    await prefs.setString(_deliveryObservationsKey, jsonStr);
+  }
+
+  Future<List<DeliveryObservation>> loadDeliveryObservations() async {
+    final prefs = PrefsManager.instance;
+    final jsonStr = prefs.getString(_deliveryObservationsKey);
+
+    if (jsonStr == null) return [];
+
+    try {
+      final list = jsonDecode(jsonStr) as List;
+      return list
+          .map((e) => DeliveryObservation.fromJson(e as Map<String, dynamic>))
+          .toList();
+    } catch (e) {
+      return [];
+    }
+  }
+
+  Future<void> clearDeliveryObservations() async {
+    final prefs = PrefsManager.instance;
+    await prefs.remove(_deliveryObservationsKey);
+  }
 }

lib/services/tcp_transport_service.dart

@@ -0,0 +1,2 @@
+export 'tcp_transport_service_native.dart'
+    if (dart.library.js_interop) 'tcp_transport_service_web.dart';

lib/services/tcp_transport_service_native.dart

@@ -0,0 +1,210 @@
+import 'dart:async';
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'app_debug_log_service.dart';
+import 'usb_serial_frame_codec.dart';
+
+class TcpTransportService {
+  final StreamController<Uint8List> _frameController =
+      StreamController<Uint8List>.broadcast();
+  final UsbSerialFrameDecoder _frameDecoder = UsbSerialFrameDecoder();
+
+  StreamSubscription<Uint8List>? _socketSubscription;
+  Socket? _socket;
+  AppDebugLogService? _debugLogService;
+  TcpTransportStatus _status = TcpTransportStatus.disconnected;
+  String? _activeHost;
+  int? _activePort;
+  Future<void> _pendingWrite = Future<void>.value();
+  int _connectGeneration = 0;
+
+  TcpTransportStatus get status => _status;
+  Stream<Uint8List> get frameStream => _frameController.stream;
+  bool get isConnected => _status == TcpTransportStatus.connected;
+  String? get activeEndpoint => _activeHost == null || _activePort == null
+      ? null
+      : '$_activeHost:$_activePort';
+
+  void setDebugLogService(AppDebugLogService? service) {
+    _debugLogService = service;
+  }
+
+  Future<void> connect({
+    required String host,
+    required int port,
+    Duration timeout = const Duration(seconds: 10),
+  }) async {
+    if (_status == TcpTransportStatus.connected ||
+        _status == TcpTransportStatus.connecting) {
+      throw StateError('TCP transport is already active');
+    }
+    final trimmedHost = host.trim();
+    if (trimmedHost.isEmpty) {
+      throw ArgumentError.value(host, 'host', 'Host cannot be empty');
+    }
+    if (port < 1 || port > 65535) {
+      throw ArgumentError.value(port, 'port', 'Port must be in 1..65535');
+    }
+
+    _status = TcpTransportStatus.connecting;
+    final generation = ++_connectGeneration;
+    _frameDecoder.reset();
+
+    try {
+      final socket = await Socket.connect(trimmedHost, port, timeout: timeout);
+      if (generation != _connectGeneration ||
+          _status != TcpTransportStatus.connecting) {
+        try {
+          await socket.close();
+        } catch (_) {}
+        try {
+          socket.destroy();
+        } catch (_) {}
+        return;
+      }
+      socket.setOption(SocketOption.tcpNoDelay, true);
+      _socket = socket;
+      _activeHost = trimmedHost;
+      _activePort = port;
+      _socketSubscription = socket.listen(
+        _handleSocketData,
+        onError: _handleSocketError,
+        onDone: _handleSocketDone,
+      );
+      _status = TcpTransportStatus.connected;
+      _debugLogService?.info(
+        'TCP transport opened endpoint=$activeEndpoint',
+        tag: 'TCP',
+      );
+    } catch (error) {
+      await _cleanupFailedConnect();
+      _status = TcpTransportStatus.disconnected;
+      rethrow;
+    }
+  }
+
+  Future<void> write(Uint8List data) async {
+    if (!isConnected || _socket == null) {
+      throw StateError('TCP transport is not connected');
+    }
+
+    final packet = wrapUsbSerialTxFrame(data);
+    _logFrameSummary('TCP TX frame', data);
+
+    final writeTask = _pendingWrite.then((_) async {
+      final socket = _socket;
+      if (!isConnected || socket == null) {
+        throw StateError('TCP transport is not connected');
+      }
+      socket.add(packet);
+      await socket.flush();
+    });
+
+    _pendingWrite = writeTask.catchError((_) {});
+    await writeTask;
+  }
+
+  Future<void> disconnect() async {
+    _connectGeneration += 1;
+    if (_status == TcpTransportStatus.disconnected) return;
+
+    final endpoint = activeEndpoint;
+    _status = TcpTransportStatus.disconnecting;
+    _frameDecoder.reset();
+    _activeHost = null;
+    _activePort = null;
+
+    final subscription = _socketSubscription;
+    _socketSubscription = null;
+    await subscription?.cancel();
+
+    final socket = _socket;
+    _socket = null;
+    try {
+      await socket?.close();
+    } catch (_) {}
+    try {
+      socket?.destroy();
+    } catch (_) {}
+
+    _status = TcpTransportStatus.disconnected;
+    _debugLogService?.info(
+      'TCP transport closed endpoint=${endpoint ?? 'unknown'}',
+      tag: 'TCP',
+    );
+  }
+
+  void dispose() {
+    unawaited(disconnect().whenComplete(_closeFrameController));
+  }
+
+  Future<void> _cleanupFailedConnect() async {
+    final subscription = _socketSubscription;
+    _socketSubscription = null;
+    await subscription?.cancel();
+    final socket = _socket;
+    _socket = null;
+    try {
+      await socket?.close();
+    } catch (_) {}
+    try {
+      socket?.destroy();
+    } catch (_) {}
+    _activeHost = null;
+    _activePort = null;
+    _frameDecoder.reset();
+  }
+
+  void _handleSocketData(Uint8List bytes) {
+    for (final packet in _frameDecoder.ingest(bytes)) {
+      if (!packet.isRxFrame) {
+        _debugLogService?.info(
+          'TCP ignored packet start=0x${packet.frameStart.toRadixString(16).padLeft(2, '0')} len=${packet.payload.length}',
+          tag: 'TCP',
+        );
+        continue;
+      }
+      _addFrame(packet.payload);
+    }
+  }
+
+  void _handleSocketError(Object error, [StackTrace? stackTrace]) {
+    _addFrameError(error, stackTrace);
+    unawaited(disconnect());
+  }
+
+  void _handleSocketDone() {
+    if (_status == TcpTransportStatus.disconnecting ||
+        _status == TcpTransportStatus.disconnected) {
+      return;
+    }
+    _addFrameError(StateError('TCP socket closed by remote endpoint'));
+    unawaited(disconnect());
+  }
+
+  void _addFrame(Uint8List payload) {
+    if (_frameController.isClosed) return;
+    _frameController.add(payload);
+  }
+
+  void _addFrameError(Object error, [StackTrace? stackTrace]) {
+    if (_frameController.isClosed) return;
+    _frameController.addError(error, stackTrace);
+  }
+
+  void _logFrameSummary(String prefix, Uint8List payload) {
+    final code = payload.isNotEmpty ? payload.first : -1;
+    _debugLogService?.info(
+      '$prefix code=$code len=${payload.length}',
+      tag: 'TCP',
+    );
+  }
+
+  Future<void> _closeFrameController() async {
+    if (_frameController.isClosed) return;
+    await _frameController.close();
+  }
+}
+
+enum TcpTransportStatus { disconnected, connecting, connected, disconnecting }

lib/services/tcp_transport_service_web.dart

@@ -0,0 +1,35 @@
+import 'dart:typed_data';
+
+import 'app_debug_log_service.dart';
+
+class TcpTransportService {
+  AppDebugLogService? _debugLogService;
+
+  Stream<Uint8List> get frameStream => const Stream<Uint8List>.empty();
+  bool get isConnected => false;
+  String? get activeEndpoint => null;
+
+  void setDebugLogService(AppDebugLogService? service) {
+    _debugLogService = service;
+  }
+
+  Future<void> connect({
+    required String host,
+    required int port,
+    Duration timeout = const Duration(seconds: 10),
+  }) async {
+    _debugLogService?.warn(
+      'TCP transport requested on web for $host:$port',
+      tag: 'TCP',
+    );
+    throw UnsupportedError('TCP transport is not supported on web.');
+  }
+
+  Future<void> write(Uint8List data) async {
+    throw UnsupportedError('TCP transport is not supported on web.');
+  }
+
+  Future<void> disconnect() async {}
+
+  void dispose() {}
+}

lib/services/timeout_prediction_service.dart

@@ -0,0 +1,229 @@
+import 'dart:async';
+import 'package:flutter/foundation.dart';
+import 'package:ml_algo/ml_algo.dart';
+import 'package:ml_dataframe/ml_dataframe.dart';
+import '../models/delivery_observation.dart';
+import 'storage_service.dart';
+
+class _ContactStats {
+  int count = 0;
+  double _sum = 0;
+
+  void add(double ms) {
+    count++;
+    _sum += ms;
+  }
+
+  double get mean => _sum / count;
+}
+
+class TimeoutPredictionService extends ChangeNotifier {
+  final StorageService? _storage;
+
+  static const int minObservations = 10;
+  static const int maxObservations = 100;
+  static const int _retrainInterval = 5;
+  // 1.5x multiplier on raw prediction to account for variance in delivery
+  // times — tight enough to improve on worst-case physics, loose enough
+  // to avoid premature timeouts from model noise.
+  static const double _safetyMargin = 1.5;
+  static const int _minContactObservations = 10;
+
+  List<DeliveryObservation> _observations = [];
+  LinearRegressor? _model;
+  List<String> _activeFeatures = [];
+  int _observationsSinceLastTrain = 0;
+  final Map<String, _ContactStats> _contactStats = {};
+  Timer? _persistTimer;
+
+  TimeoutPredictionService(StorageService storage) : _storage = storage;
+  TimeoutPredictionService.noStorage() : _storage = null;
+
+  int get observationCount => _observations.length;
+  bool get hasModel => _model != null;
+
+  Future<void> initialize() async {
+    _observations = await _storage?.loadDeliveryObservations() ?? [];
+    _rebuildContactStats();
+
+    if (_observations.length >= minObservations) {
+      _trainModel();
+    }
+
+    debugPrint(
+      'TimeoutPrediction: initialized with ${_observations.length} observations, '
+      'model=${_model != null ? "ready" : "waiting for data"}',
+    );
+  }
+
+  void recordObservation({
+    required String contactKey,
+    required int pathLength,
+    required int messageBytes,
+    required int tripTimeMs,
+    int secondsSinceLastRx = 0,
+  }) {
+    final observation = DeliveryObservation(
+      contactKey: contactKey,
+      pathLength: pathLength,
+      messageBytes: messageBytes,
+      secondsSinceLastRx: secondsSinceLastRx,
+      isFlood: pathLength < 0,
+      deliveryMs: tripTimeMs,
+      timestamp: DateTime.now(),
+    );
+
+    _observations.add(observation);
+    if (_observations.length > maxObservations) {
+      _observations.removeAt(0);
+    }
+
+    _contactStats.putIfAbsent(contactKey, () => _ContactStats());
+    _contactStats[contactKey]!.add(tripTimeMs.toDouble());
+
+    _observationsSinceLastTrain++;
+    if (_observationsSinceLastTrain >= _retrainInterval &&
+        _observations.length >= minObservations) {
+      _trainModel();
+    }
+
+    _persistTimer?.cancel();
+    _persistTimer = Timer(const Duration(seconds: 2), () {
+      _storage?.saveDeliveryObservations(_observations);
+    });
+    debugPrint(
+      'TimeoutPrediction: recorded ${tripTimeMs}ms for $pathLength hops '
+      '(${_observations.length} total)',
+    );
+  }
+
+  int? predictTimeout({
+    String? contactKey,
+    required int pathLength,
+    required int messageBytes,
+    int secondsSinceLastRx = 0,
+  }) {
+    if (_model == null) return null;
+
+    try {
+      if (_activeFeatures.isEmpty) return null;
+
+      final allFeatures = {
+        'pathLength': pathLength.toDouble(),
+        'messageBytes': messageBytes.toDouble(),
+        'secSinceRx': secondsSinceLastRx.toDouble(),
+        'isFlood': pathLength < 0 ? 1.0 : 0.0,
+      };
+      final row = _activeFeatures.map((f) => allFeatures[f]!).toList();
+
+      final features = DataFrame(
+        [row],
+        headerExists: false,
+        header: _activeFeatures,
+      );
+
+      final prediction = _model!.predict(features);
+      final rawValue = prediction.rows.first.first;
+      var predictedMs = (rawValue is double)
+          ? rawValue
+          : (rawValue as num).toDouble();
+
+      debugPrint(
+        'TimeoutPrediction: raw prediction=$predictedMs for '
+        'pathLength=$pathLength, messageBytes=$messageBytes, '
+        'features=$_activeFeatures',
+      );
+
+      // Sanity check: if prediction is negative or zero, fall back
+      if (predictedMs <= 0) return null;
+
+      // Blend with per-contact mean if enough data
+      if (contactKey != null) {
+        final stats = _contactStats[contactKey];
+        if (stats != null && stats.count >= _minContactObservations) {
+          predictedMs = 0.5 * predictedMs + 0.5 * stats.mean;
+        }
+      }
+
+      // Connector clamps this between physics min/max bounds
+      final timeout = (predictedMs * _safetyMargin).ceil();
+      debugPrint(
+        'TimeoutPrediction: ML timeout ${timeout}ms '
+        '(raw: ${predictedMs.round()}ms, contact: $contactKey)',
+      );
+      return timeout;
+    } catch (e) {
+      debugPrint('TimeoutPrediction: prediction failed: $e');
+      return null;
+    }
+  }
+
+  void _trainModel() {
+    try {
+      // Build feature columns, then exclude any with zero variance
+      // (ml_algo's OLS produces all-zero coefficients for singular matrices)
+      final allNames = ['pathLength', 'messageBytes', 'secSinceRx', 'isFlood'];
+      final allExtractors = <double Function(DeliveryObservation)>[
+        (o) => o.pathLength.toDouble(),
+        (o) => o.messageBytes.toDouble(),
+        (o) => o.secondsSinceLastRx.toDouble(),
+        (o) => o.isFlood ? 1.0 : 0.0,
+      ];
+
+      _activeFeatures = [];
+      for (var i = 0; i < allNames.length; i++) {
+        final values = _observations.map(allExtractors[i]).toSet();
+        if (values.length > 1) _activeFeatures.add(allNames[i]);
+      }
+
+      if (_activeFeatures.isEmpty) {
+        debugPrint(
+          'TimeoutPrediction: no features with variance, skipping training',
+        );
+        return;
+      }
+
+      final header = [..._activeFeatures, 'deliveryMs'];
+      final rows = _observations.map((o) {
+        final row = <double>[];
+        for (var i = 0; i < allNames.length; i++) {
+          if (_activeFeatures.contains(allNames[i])) {
+            row.add(allExtractors[i](o));
+          }
+        }
+        row.add(o.deliveryMs.toDouble());
+        return row;
+      });
+
+      final data = DataFrame([header, ...rows], headerExists: true);
+
+      _model = LinearRegressor(data, 'deliveryMs');
+      _observationsSinceLastTrain = 0;
+
+      // Log training summary with sample predictions
+      final avgMs =
+          _observations.map((o) => o.deliveryMs).reduce((a, b) => a + b) /
+          _observations.length;
+      debugPrint(
+        'TimeoutPrediction: trained on ${_observations.length} observations '
+        '(avg: ${avgMs.round()}ms, features: $_activeFeatures)',
+      );
+    } catch (e) {
+      debugPrint('TimeoutPrediction: training failed: $e');
+    }
+  }
+
+  @override
+  void dispose() {
+    _persistTimer?.cancel();
+    super.dispose();
+  }
+
+  void _rebuildContactStats() {
+    _contactStats.clear();
+    for (final obs in _observations) {
+      _contactStats.putIfAbsent(obs.contactKey, () => _ContactStats());
+      _contactStats[obs.contactKey]!.add(obs.deliveryMs.toDouble());
+    }
+  }
+}

lib/storage/channel_message_store.dart

@@ -48,7 +48,7 @@ class ChannelMessageStore {
     final key = '$keyFor$channelIndex';
     final oldKey = '$_keyPrefix$channelIndex';
 
-    String? jsonString = prefs.getString(oldKey);
+    String? jsonString = prefs.getString(key);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(oldKey);

lib/storage/channel_order_store.dart

@@ -26,7 +26,7 @@ class ChannelOrderStore {
       return [];
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/storage/channel_settings_store.dart

@@ -32,7 +32,7 @@ class ChannelSettingsStore {
         await prefs.setBool(key, enabled);
       }
     }
-    return prefs.getBool(key) ?? false;
+    return enabled ?? false;
   }
 
   Future<void> saveSmazEnabled(int channelIndex, bool enabled) async {

lib/storage/channel_store.dart

@@ -19,7 +19,7 @@ class ChannelStore {
       return [];
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/storage/community_store.dart

@@ -25,7 +25,7 @@ class CommunityStore {
       return [];
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/storage/contact_discovery_store.dart

@@ -1,13 +1,13 @@
 import 'dart:convert';
 import 'dart:typed_data';
 
-import '../models/discovery_contact.dart';
+import '../models/contact.dart';
 import 'prefs_manager.dart';
 
 class ContactDiscoveryStore {
   static const String _keyPrefix = 'discovered_contacts';
 
-  Future<List<DiscoveryContact>> loadContacts() async {
+  Future<List<Contact>> loadContacts() async {
     final prefs = PrefsManager.instance;
     final jsonStr = prefs.getString(_keyPrefix);
     if (jsonStr == null) return [];
@@ -22,40 +22,62 @@ class ContactDiscoveryStore {
     }
   }
 
-  Future<void> saveContacts(List<DiscoveryContact> contacts) async {
+  Future<void> saveContacts(List<Contact> contacts) async {
     final prefs = PrefsManager.instance;
     final jsonList = contacts.map(_toJson).toList();
     await prefs.setString(_keyPrefix, jsonEncode(jsonList));
   }
 
-  Map<String, dynamic> _toJson(DiscoveryContact contact) {
+  Map<String, dynamic> _toJson(Contact contact) {
     return {
-      'rawPacket': base64Encode(contact.rawPacket),
       'publicKey': base64Encode(contact.publicKey),
       'name': contact.name,
       'type': contact.type,
+      'flags': contact.flags,
       'pathLength': contact.pathLength,
       'path': base64Encode(contact.path),
+      'pathOverride': contact.pathOverride,
+      'pathOverrideBytes': contact.pathOverrideBytes != null
+          ? base64Encode(contact.pathOverrideBytes!)
+          : null,
       'latitude': contact.latitude,
       'longitude': contact.longitude,
       'lastSeen': contact.lastSeen.millisecondsSinceEpoch,
+      'lastMessageAt': contact.lastMessageAt.millisecondsSinceEpoch,
+      'rawPacket': contact.rawPacket != null
+          ? base64Encode(contact.rawPacket!)
+          : null,
     };
   }
 
-  DiscoveryContact _fromJson(Map<String, dynamic> json) {
+  Contact _fromJson(Map<String, dynamic> json) {
     final lastSeenMs = json['lastSeen'] as int? ?? 0;
-    return DiscoveryContact(
+    final lastMessageMs = json['lastMessageAt'] as int?;
-      rawPacket: Uint8List.fromList(base64Decode(json['rawPacket'] as String)),
+    return Contact(
       publicKey: Uint8List.fromList(base64Decode(json['publicKey'] as String)),
       name: json['name'] as String? ?? 'Unknown',
       type: json['type'] as int? ?? 0,
+      flags: json['flags'] as int? ?? 0,
       pathLength: json['pathLength'] as int? ?? -1,
       path: json['path'] != null
           ? Uint8List.fromList(base64Decode(json['path'] as String))
           : Uint8List(0),
+      pathOverride: json['pathOverride'] as int?,
+      pathOverrideBytes: json['pathOverrideBytes'] != null
+          ? Uint8List.fromList(
+              base64Decode(json['pathOverrideBytes'] as String),
+            )
+          : null,
       latitude: (json['latitude'] as num?)?.toDouble(),
       longitude: (json['longitude'] as num?)?.toDouble(),
       lastSeen: DateTime.fromMillisecondsSinceEpoch(lastSeenMs),
+      lastMessageAt: DateTime.fromMillisecondsSinceEpoch(
+        lastMessageMs ?? lastSeenMs,
+      ),
+      isActive: false,
+      rawPacket: json['rawPacket'] != null
+          ? Uint8List.fromList(base64Decode(json['rawPacket'] as String))
+          : null,
     );
   }
 }

lib/storage/contact_group_store.dart

@@ -18,7 +18,7 @@ class ContactGroupStore {
       return [];
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/storage/contact_store.dart

@@ -76,6 +76,10 @@ class ContactStore {
       'longitude': contact.longitude,
       'lastSeen': contact.lastSeen.millisecondsSinceEpoch,
       'lastMessageAt': contact.lastMessageAt.millisecondsSinceEpoch,
+      'isActive': contact.isActive,
+      'rawPacket': contact.rawPacket != null
+          ? base64Encode(contact.rawPacket!)
+          : null,
     };
   }
 
@@ -103,6 +107,10 @@ class ContactStore {
       lastMessageAt: DateTime.fromMillisecondsSinceEpoch(
         lastMessageMs ?? lastSeenMs,
       ),
+      isActive: json['isActive'] as bool? ?? true,
+      rawPacket: json['rawPacket'] != null
+          ? Uint8List.fromList(base64Decode(json['rawPacket'] as String))
+          : null,
     );
   }
 }

lib/storage/unread_store.dart

@@ -32,7 +32,7 @@ class UnreadStore {
       return {};
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/utils/contact_search.dart

@@ -1,5 +1,3 @@
-import 'package:meshcore_open/models/discovery_contact.dart';
-
 import '../models/contact.dart';
 
 bool matchesContactQuery(Contact contact, String query) {
@@ -16,7 +14,7 @@ bool matchesContactQuery(Contact contact, String query) {
   return contact.publicKeyHex.toLowerCase().startsWith(hexPrefix);
 }
 
-bool matchesDiscoveryContactQuery(DiscoveryContact contact, String query) {
+bool matchesDiscoveryContactQuery(Contact contact, String query) {
   final normalizedQuery = query.trim().toLowerCase();
   if (normalizedQuery.isEmpty) return true;
 

lib/widgets/snr_indicator.dart

@@ -157,8 +157,11 @@ class _SNRIndicatorState extends State<SNRIndicator> {
                   repeater.snr,
                   widget.connector.currentSf,
                 );
-
+                final allContacts = [
-                final name = widget.connector.contacts
+                  ...widget.connector.contacts,
+                  ...widget.connector.discoveredContacts,
+                ];
+                final name = allContacts
                     .where((c) => c.publicKey.first == repeater.pubkeyFirstByte)
                     .map((c) => c.name)
                     .firstOrNull;

pubspec.yaml

@@ -69,6 +69,8 @@ dependencies:
   material_symbols_icons: ^4.2906.0
   web: ^1.1.1
   flutter_svg: ^2.0.10+1
+  ml_algo: ^16.0.0
+  ml_dataframe: ^1.0.0
 
 dev_dependencies:
   flutter_test:

test/connector/meshcore_connector_tcp_error_filter_test.dart

@@ -0,0 +1,93 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_open/connector/meshcore_connector.dart';
+
+void main() {
+  group('shouldIgnoreLateTcpConnectError', () {
+    test('returns true for manual cancel during disconnecting state', () {
+      final result = MeshCoreConnector.shouldIgnoreLateTcpConnectError(
+        manualDisconnect: true,
+        state: MeshCoreConnectionState.disconnecting,
+        activeTransport: MeshCoreTransportType.bluetooth,
+        tcpManagerConnected: false,
+      );
+
+      expect(result, isTrue);
+    });
+
+    test(
+      'returns true for manual cancel after reaching disconnected state',
+      () {
+        final result = MeshCoreConnector.shouldIgnoreLateTcpConnectError(
+          manualDisconnect: true,
+          state: MeshCoreConnectionState.disconnected,
+          activeTransport: MeshCoreTransportType.bluetooth,
+          tcpManagerConnected: false,
+        );
+
+        expect(result, isTrue);
+      },
+    );
+
+    test('returns false when not a manual disconnect', () {
+      final result = MeshCoreConnector.shouldIgnoreLateTcpConnectError(
+        manualDisconnect: false,
+        state: MeshCoreConnectionState.disconnecting,
+        activeTransport: MeshCoreTransportType.bluetooth,
+        tcpManagerConnected: false,
+      );
+
+      expect(result, isFalse);
+    });
+
+    test('returns false for connected state handshake failures', () {
+      final result = MeshCoreConnector.shouldIgnoreLateTcpConnectError(
+        manualDisconnect: true,
+        state: MeshCoreConnectionState.connected,
+        activeTransport: MeshCoreTransportType.tcp,
+        tcpManagerConnected: true,
+      );
+
+      expect(result, isFalse);
+    });
+
+    test('returns false when TCP is still active while disconnecting', () {
+      final result = MeshCoreConnector.shouldIgnoreLateTcpConnectError(
+        manualDisconnect: true,
+        state: MeshCoreConnectionState.disconnecting,
+        activeTransport: MeshCoreTransportType.tcp,
+        tcpManagerConnected: true,
+      );
+
+      expect(result, isFalse);
+    });
+  });
+
+  group('shouldResetStateAfterTcpConnectAbort', () {
+    test('returns true when TCP connect is still in connecting state', () {
+      final result = MeshCoreConnector.shouldResetStateAfterTcpConnectAbort(
+        state: MeshCoreConnectionState.connecting,
+        activeTransport: MeshCoreTransportType.tcp,
+      );
+
+      expect(result, isTrue);
+    });
+
+    test('returns false when state is already disconnected', () {
+      final result = MeshCoreConnector.shouldResetStateAfterTcpConnectAbort(
+        state: MeshCoreConnectionState.disconnected,
+        activeTransport: MeshCoreTransportType.tcp,
+      );
+
+      expect(result, isFalse);
+    });
+
+    test('returns false when transport switched away from TCP', () {
+      final result = MeshCoreConnector.shouldResetStateAfterTcpConnectAbort(
+        state: MeshCoreConnectionState.connecting,
+        activeTransport: MeshCoreTransportType.bluetooth,
+      );
+
+      expect(result, isFalse);
+    });
+  });
+}

test/screens/tcp_flow_test.dart

@@ -0,0 +1,192 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:provider/provider.dart';
+
+import 'package:meshcore_open/connector/meshcore_connector.dart';
+import 'package:meshcore_open/l10n/app_localizations.dart';
+import 'package:meshcore_open/screens/scanner_screen.dart';
+import 'package:meshcore_open/screens/tcp_screen.dart';
+
+class _FakeMeshCoreConnector extends MeshCoreConnector {
+  _FakeMeshCoreConnector();
+
+  MeshCoreConnectionState initialState = MeshCoreConnectionState.disconnected;
+  MeshCoreTransportType initialTransport = MeshCoreTransportType.bluetooth;
+  String? initialEndpoint;
+  int connectTcpCalls = 0;
+  String? lastHost;
+  int? lastPort;
+
+  @override
+  MeshCoreConnectionState get state => initialState;
+
+  @override
+  MeshCoreTransportType get activeTransport => initialTransport;
+
+  @override
+  bool get isTcpTransportConnected =>
+      initialState == MeshCoreConnectionState.connected &&
+      initialTransport == MeshCoreTransportType.tcp;
+
+  @override
+  String? get activeTcpEndpoint => initialEndpoint;
+
+  @override
+  Future<void> connectTcp({required String host, required int port}) async {
+    connectTcpCalls += 1;
+    lastHost = host;
+    lastPort = port;
+  }
+}
+
+Widget _buildTestApp({
+  required MeshCoreConnector connector,
+  required Widget child,
+  Locale? locale,
+}) {
+  return ChangeNotifierProvider<MeshCoreConnector>.value(
+    value: connector,
+    child: MaterialApp(
+      locale: locale,
+      localizationsDelegates: AppLocalizations.localizationsDelegates,
+      supportedLocales: AppLocalizations.supportedLocales,
+      home: child,
+    ),
+  );
+}
+
+void main() {
+  testWidgets('TcpScreen uses localized TCP copy', (tester) async {
+    final connector = _FakeMeshCoreConnector();
+
+    await tester.pumpWidget(
+      _buildTestApp(
+        connector: connector,
+        child: const TcpScreen(),
+        locale: const Locale('en'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    final context = tester.element(find.byType(TcpScreen));
+    final l10n = AppLocalizations.of(context);
+
+    expect(find.text(l10n.tcpScreenTitle), findsOneWidget);
+    expect(find.text(l10n.tcpHostLabel), findsOneWidget);
+    expect(find.text(l10n.tcpPortLabel), findsOneWidget);
+    expect(find.text(l10n.tcpStatus_notConnected), findsOneWidget);
+  });
+
+  testWidgets('TcpScreen validation errors are localized', (tester) async {
+    final connector = _FakeMeshCoreConnector();
+
+    await tester.pumpWidget(
+      _buildTestApp(
+        connector: connector,
+        child: const TcpScreen(),
+        locale: const Locale('en'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    final context = tester.element(find.byType(TcpScreen));
+    final l10n = AppLocalizations.of(context);
+
+    await tester.enterText(find.byType(TextField).first, '');
+    await tester.tap(find.byKey(const Key('tcp_connect_button')));
+    await tester.pumpAndSettle();
+
+    expect(find.text(l10n.tcpErrorHostRequired), findsOneWidget);
+    expect(connector.connectTcpCalls, 0);
+
+    await tester.enterText(find.byType(TextField).first, '192.168.1.50');
+    await tester.enterText(find.byType(TextField).at(1), '99999');
+    await tester.tap(find.byKey(const Key('tcp_connect_button')));
+    await tester.pumpAndSettle();
+
+    expect(connector.connectTcpCalls, 0);
+  });
+
+  testWidgets('TCP Bluetooth action returns to existing scanner route', (
+    tester,
+  ) async {
+    final connector = _FakeMeshCoreConnector();
+
+    await tester.pumpWidget(
+      _buildTestApp(connector: connector, child: const ScannerScreen()),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.widgetWithText(FloatingActionButton, 'TCP'));
+    await tester.pumpAndSettle();
+    expect(find.byType(TcpScreen), findsOneWidget);
+
+    await tester.tap(find.widgetWithText(FloatingActionButton, 'Bluetooth'));
+    await tester.pumpAndSettle();
+
+    expect(find.byType(TcpScreen), findsNothing);
+    expect(find.byType(ScannerScreen), findsOneWidget);
+    final navigatorState = tester.state<NavigatorState>(find.byType(Navigator));
+    expect(navigatorState.canPop(), isFalse);
+
+    // ScannerScreen.dispose() schedules disconnect work that debounces notify.
+    // Drain that debounce timer before test teardown.
+    await tester.pumpWidget(const SizedBox.shrink());
+    await tester.pump(const Duration(milliseconds: 60));
+  });
+
+  testWidgets('TcpScreen disables connect button while connector is scanning', (
+    tester,
+  ) async {
+    final connector = _FakeMeshCoreConnector()
+      ..initialState = MeshCoreConnectionState.scanning;
+
+    await tester.pumpWidget(
+      _buildTestApp(
+        connector: connector,
+        child: const TcpScreen(),
+        locale: const Locale('en'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    final button = tester.widget<ButtonStyleButton>(
+      find.byKey(const Key('tcp_connect_button')),
+    );
+    expect(button.onPressed, isNull);
+    expect(connector.connectTcpCalls, 0);
+  });
+
+  testWidgets('TcpScreen narrow width long status text does not overflow', (
+    tester,
+  ) async {
+    await tester.binding.setSurfaceSize(const Size(320, 700));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+
+    final connector = _FakeMeshCoreConnector()
+      ..initialState = MeshCoreConnectionState.connected
+      ..initialTransport = MeshCoreTransportType.tcp
+      ..initialEndpoint = 'meshcore-room-server-very-long-hostname.local:5000';
+
+    await tester.pumpWidget(
+      _buildTestApp(
+        connector: connector,
+        child: const TcpScreen(),
+        locale: const Locale('en'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(tester.takeException(), isNull);
+
+    final context = tester.element(find.byType(TcpScreen));
+    final l10n = AppLocalizations.of(context);
+    expect(
+      find.text(l10n.scanner_connectedTo(connector.initialEndpoint!)),
+      findsOneWidget,
+    );
+
+    await tester.pumpWidget(const SizedBox.shrink());
+    await tester.pump(const Duration(milliseconds: 60));
+  });
+}

test/screens/usb_flow_test.dart

@@ -116,12 +116,7 @@ void main() {
       );
       await tester.pumpAndSettle();
 
-      await tester.tap(
+      await tester.tap(find.byType(ListTile).first);
-        find.ancestor(
-          of: find.text('Connect'),
-          matching: find.bySubtype<ElevatedButton>(),
-        ),
-      );
       await tester.pump();
 
       expect(connector.connectUsbCalls, 0);
@@ -145,12 +140,7 @@ void main() {
     );
     await tester.pumpAndSettle();
 
-    await tester.tap(
+    await tester.tap(find.byType(ListTile).first);
-      find.ancestor(
-        of: find.text('Connect'),
-        matching: find.bySubtype<ElevatedButton>(),
-      ),
-    );
     await tester.pump();
 
     expect(connector.connectUsbCalls, 1);
@@ -179,6 +169,68 @@ void main() {
     await tester.pump(const Duration(milliseconds: 60));
   });
 
+  testWidgets('ScannerScreen narrow width keeps actions without overflow', (
+    tester,
+  ) async {
+    await tester.binding.setSurfaceSize(const Size(320, 700));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+
+    final connector = _FakeMeshCoreConnector();
+
+    await tester.pumpWidget(
+      _buildTestApp(connector: connector, child: const ScannerScreen()),
+    );
+    await tester.pumpAndSettle();
+
+    expect(tester.takeException(), isNull);
+
+    final context = tester.element(find.byType(ScannerScreen));
+    final l10n = AppLocalizations.of(context);
+    expect(find.text(l10n.scanner_scan), findsOneWidget);
+
+    if (PlatformInfo.supportsUsbSerial) {
+      expect(find.text(l10n.connectionChoiceUsbLabel), findsOneWidget);
+    }
+    if (!PlatformInfo.isWeb) {
+      expect(find.text(l10n.connectionChoiceTcpLabel), findsOneWidget);
+    }
+
+    await tester.pumpWidget(const SizedBox.shrink());
+    await tester.pump(const Duration(milliseconds: 60));
+  });
+
+  testWidgets('UsbScreen narrow width long status text does not overflow', (
+    tester,
+  ) async {
+    await tester.binding.setSurfaceSize(const Size(320, 700));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+
+    final connector =
+        _FakeMeshCoreConnector(initialState: MeshCoreConnectionState.connected)
+          ..fakeUsbTransportConnected = true
+          ..fakeActiveUsbPortDisplayLabel =
+              '/dev/bus/usb/001/002 - KD3CGK mesh-utility.org very long label';
+
+    await tester.pumpWidget(
+      _buildTestApp(connector: connector, child: const UsbScreen()),
+    );
+    await tester.pumpAndSettle();
+
+    expect(tester.takeException(), isNull);
+
+    final context = tester.element(find.byType(UsbScreen));
+    final l10n = AppLocalizations.of(context);
+    expect(
+      find.text(
+        l10n.scanner_connectedTo(connector.fakeActiveUsbPortDisplayLabel!),
+      ),
+      findsOneWidget,
+    );
+
+    await tester.pumpWidget(const SizedBox.shrink());
+    await tester.pump(const Duration(milliseconds: 60));
+  });
+
   group('Error Handling', () {
     testWidgets('shows error SnackBar when listing ports fails', (
       tester,
@@ -212,12 +264,7 @@ void main() {
       );
       await tester.pumpAndSettle();
 
-      await tester.tap(
+      await tester.tap(find.byType(ListTile).first);
-        find.ancestor(
-          of: find.text('Connect'),
-          matching: find.bySubtype<ElevatedButton>(),
-        ),
-      );
       await tester.pumpAndSettle();
 
       expect(connectAttempted, isTrue);

test/services/ml_algo_sanity_test.dart

@@ -0,0 +1,156 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ml_algo/ml_algo.dart';
+import 'package:ml_dataframe/ml_dataframe.dart';
+
+void main() {
+  test('LinearRegressor basic sanity check', () {
+    // Simple: y = 2x + 100
+    final data = DataFrame(
+      [
+        [1.0, 102.0],
+        [2.0, 104.0],
+        [3.0, 106.0],
+        [4.0, 108.0],
+        [5.0, 110.0],
+        [10.0, 120.0],
+        [20.0, 140.0],
+        [50.0, 200.0],
+        [0.0, 100.0],
+        [100.0, 300.0],
+      ],
+      headerExists: false,
+      header: ['x', 'y'],
+    );
+
+    debugPrint('Training data columns: ${data.header}');
+    debugPrint('Training data rows: ${data.rows.length}');
+
+    final model = LinearRegressor(data, 'y');
+
+    final testDf = DataFrame(
+      [
+        [25.0],
+      ],
+      headerExists: false,
+      header: ['x'],
+    );
+
+    final prediction = model.predict(testDf);
+    final value = prediction.rows.first.first;
+    debugPrint('Predict x=25 → y=$value (expected ~150)');
+    expect((value as num).toDouble(), closeTo(150, 5));
+  });
+
+  test('LinearRegressor multi-feature with constant column produces zeros', () {
+    // isFlood=0 for all rows → zero-variance column → singular matrix
+    final data = DataFrame(
+      [
+        [0.0, 50.0, 14.0, 0.0, 1900.0],
+        [0.0, 80.0, 14.0, 0.0, 2200.0],
+        [2.0, 50.0, 14.0, 0.0, 5000.0],
+        [4.0, 50.0, 14.0, 0.0, 9500.0],
+      ],
+      headerExists: false,
+      header: [
+        'pathLength',
+        'messageBytes',
+        'hourOfDay',
+        'isFlood',
+        'deliveryMs',
+      ],
+    );
+
+    final model = LinearRegressor(data, 'deliveryMs');
+    final testDf = DataFrame(
+      [
+        [2.0, 50.0, 14.0, 0.0],
+      ],
+      headerExists: false,
+      header: ['pathLength', 'messageBytes', 'hourOfDay', 'isFlood'],
+    );
+    final pred = model.predict(testDf).rows.first.first;
+    debugPrint(
+      'With constant isFlood column: hops=2 → ${(pred as num).round()}ms (likely 0)',
+    );
+  });
+
+  test('LinearRegressor 2-feature works correctly', () {
+    // Just pathLength + messageBytes → deliveryMs
+    final data = DataFrame(
+      [
+        [0.0, 50.0, 1900.0],
+        [0.0, 80.0, 2200.0],
+        [2.0, 50.0, 5000.0],
+        [2.0, 80.0, 5500.0],
+        [4.0, 50.0, 9500.0],
+        [4.0, 80.0, 10000.0],
+        [0.0, 30.0, 1800.0],
+        [2.0, 30.0, 4800.0],
+        [4.0, 30.0, 9000.0],
+        [0.0, 60.0, 2000.0],
+      ],
+      headerExists: false,
+      header: ['pathLength', 'messageBytes', 'deliveryMs'],
+    );
+
+    final model = LinearRegressor(data, 'deliveryMs');
+
+    for (final hops in [0.0, 2.0, 4.0]) {
+      final testDf = DataFrame(
+        [
+          [hops, 50.0],
+        ],
+        headerExists: false,
+        header: ['pathLength', 'messageBytes'],
+      );
+      final pred = model.predict(testDf).rows.first.first;
+      debugPrint('2-feature: hops=$hops → ${(pred as num).round()}ms');
+    }
+  });
+
+  test('LinearRegressor multi-feature with variance in all columns', () {
+    // Mix flood and direct so isFlood has variance
+    final data = DataFrame(
+      [
+        [0.0, 50.0, 14.0, 0.0, 1900.0],
+        [0.0, 80.0, 10.0, 0.0, 2200.0],
+        [2.0, 50.0, 16.0, 0.0, 5000.0],
+        [2.0, 80.0, 20.0, 0.0, 5500.0],
+        [4.0, 50.0, 8.0, 0.0, 9500.0],
+        [4.0, 80.0, 12.0, 0.0, 10000.0],
+        [-1.0, 40.0, 14.0, 1.0, 5000.0],
+        [-1.0, 60.0, 18.0, 1.0, 6500.0],
+        [-1.0, 30.0, 10.0, 1.0, 4000.0],
+        [-1.0, 80.0, 22.0, 1.0, 7000.0],
+      ],
+      headerExists: false,
+      header: [
+        'pathLength',
+        'messageBytes',
+        'hourOfDay',
+        'isFlood',
+        'deliveryMs',
+      ],
+    );
+
+    final model = LinearRegressor(data, 'deliveryMs');
+
+    for (final tc in [
+      [0.0, 50.0, 14.0, 0.0],
+      [2.0, 50.0, 14.0, 0.0],
+      [4.0, 50.0, 14.0, 0.0],
+      [-1.0, 50.0, 14.0, 1.0],
+    ]) {
+      final testDf = DataFrame(
+        [tc],
+        headerExists: false,
+        header: ['pathLength', 'messageBytes', 'hourOfDay', 'isFlood'],
+      );
+      final pred = model.predict(testDf).rows.first.first;
+      debugPrint(
+        '4-feature: hops=${tc[0]} flood=${tc[3]} → ${(pred as num).round()}ms',
+      );
+    }
+  });
+}

test/services/tcp_transport_service_native_test.dart

@@ -0,0 +1,136 @@
+import 'dart:async';
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_open/services/tcp_transport_service_native.dart';
+import 'package:meshcore_open/services/usb_serial_frame_codec.dart';
+
+final class _DelayedConnectOverrides extends IOOverrides {
+  _DelayedConnectOverrides(this.delay);
+
+  final Duration delay;
+
+  @override
+  Future<Socket> socketConnect(
+    host,
+    int port, {
+    sourceAddress,
+    int sourcePort = 0,
+    Duration? timeout,
+  }) async {
+    await Future<void>.delayed(delay);
+    return super.socketConnect(
+      host,
+      port,
+      sourceAddress: sourceAddress,
+      sourcePort: sourcePort,
+      timeout: timeout,
+    );
+  }
+}
+
+void main() {
+  test('connect/disconnect updates TCP transport state', () async {
+    final server = await ServerSocket.bind(InternetAddress.loopbackIPv4, 0);
+    final service = TcpTransportService();
+
+    try {
+      await service.connect(
+        host: InternetAddress.loopbackIPv4.address,
+        port: server.port,
+      );
+
+      expect(service.isConnected, isTrue);
+      expect(
+        service.activeEndpoint,
+        '${InternetAddress.loopbackIPv4.address}:${server.port}',
+      );
+
+      await service.disconnect();
+
+      expect(service.isConnected, isFalse);
+      expect(service.activeEndpoint, isNull);
+    } finally {
+      await service.disconnect();
+      await server.close();
+    }
+  });
+
+  test('disconnect is safe when already disconnected', () async {
+    final service = TcpTransportService();
+
+    await service.disconnect();
+    await service.disconnect();
+
+    expect(service.isConnected, isFalse);
+    expect(service.activeEndpoint, isNull);
+  });
+
+  test('emits only RX frames from socket stream', () async {
+    final server = await ServerSocket.bind(InternetAddress.loopbackIPv4, 0);
+    final acceptedSocket = Completer<Socket>();
+    final service = TcpTransportService();
+    final receivedFrames = <Uint8List>[];
+
+    final serverSub = server.listen((socket) {
+      if (!acceptedSocket.isCompleted) {
+        acceptedSocket.complete(socket);
+      } else {
+        socket.destroy();
+      }
+    });
+    final frameSub = service.frameStream.listen(receivedFrames.add);
+
+    try {
+      await service.connect(
+        host: InternetAddress.loopbackIPv4.address,
+        port: server.port,
+      );
+
+      final socket = await acceptedSocket.future.timeout(
+        const Duration(seconds: 2),
+      );
+
+      socket.add(<int>[usbSerialTxFrameStart, 0x01, 0x00, 0x11]);
+      socket.add(<int>[usbSerialRxFrameStart, 0x02, 0x00, 0x33, 0x44]);
+      await socket.flush();
+
+      await Future<void>.delayed(const Duration(milliseconds: 20));
+
+      expect(receivedFrames, hasLength(1));
+      expect(receivedFrames.single, orderedEquals(<int>[0x33, 0x44]));
+    } finally {
+      await service.disconnect();
+      await frameSub.cancel();
+      await serverSub.cancel();
+      await server.close();
+    }
+  });
+
+  test(
+    'disconnect during in-flight connect keeps transport disconnected',
+    () async {
+      final server = await ServerSocket.bind(InternetAddress.loopbackIPv4, 0);
+      final service = TcpTransportService();
+      final host = InternetAddress.loopbackIPv4.address;
+
+      try {
+        await IOOverrides.runWithIOOverrides(() async {
+          final connectFuture = service.connect(host: host, port: server.port);
+
+          await Future<void>.delayed(const Duration(milliseconds: 10));
+          await service.disconnect();
+          await connectFuture;
+
+          expect(service.isConnected, isFalse);
+          expect(service.status, TcpTransportStatus.disconnected);
+          expect(service.activeEndpoint, isNull);
+        }, _DelayedConnectOverrides(const Duration(milliseconds: 120)));
+      } finally {
+        await service.disconnect();
+        await server.close();
+      }
+    },
+  );
+}

test/services/timeout_prediction_service_test.dart

@@ -0,0 +1,164 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_open/models/delivery_observation.dart';
+import 'package:meshcore_open/services/timeout_prediction_service.dart';
+
+void main() {
+  late TimeoutPredictionService service;
+
+  setUp(() {
+    service = TimeoutPredictionService.noStorage();
+  });
+
+  test('trains on sample data and predicts sensible timeouts', () {
+    // Simulate realistic delivery data:
+    // Direct 0-hop messages: ~1500-2500ms
+    // 2-hop messages: ~4000-6000ms
+    // 4-hop messages: ~8000-12000ms
+    // Flood messages: ~3000-8000ms
+    final sampleData = [
+      // 0-hop direct
+      _obs(pathLength: 0, messageBytes: 20, deliveryMs: 1800),
+      _obs(pathLength: 0, messageBytes: 50, deliveryMs: 2100),
+      _obs(pathLength: 0, messageBytes: 80, deliveryMs: 2400),
+      _obs(pathLength: 0, messageBytes: 30, deliveryMs: 1925),
+      // 2-hop direct
+      _obs(pathLength: 2, messageBytes: 40, deliveryMs: 4500),
+      _obs(pathLength: 2, messageBytes: 60, deliveryMs: 5200),
+      _obs(pathLength: 2, messageBytes: 25, deliveryMs: 4100),
+      // 4-hop direct
+      _obs(pathLength: 4, messageBytes: 50, deliveryMs: 9800),
+      _obs(pathLength: 4, messageBytes: 30, deliveryMs: 8500),
+      _obs(pathLength: 4, messageBytes: 70, deliveryMs: 10570),
+      // Flood
+      _obs(pathLength: -1, messageBytes: 40, deliveryMs: 5000),
+      _obs(pathLength: -1, messageBytes: 60, deliveryMs: 6500),
+    ];
+
+    // Feed all observations
+    for (final obs in sampleData) {
+      service.recordObservation(
+        contactKey: obs.contactKey,
+        pathLength: obs.pathLength,
+        messageBytes: obs.messageBytes,
+        tripTimeMs: obs.deliveryMs,
+      );
+    }
+
+    expect(service.hasModel, isTrue);
+    expect(service.observationCount, equals(12));
+
+    // Predict for different scenarios
+    final direct0 = service.predictTimeout(pathLength: 0, messageBytes: 50);
+    final direct2 = service.predictTimeout(pathLength: 2, messageBytes: 50);
+    final direct4 = service.predictTimeout(pathLength: 4, messageBytes: 50);
+    final flood = service.predictTimeout(pathLength: -1, messageBytes: 50);
+
+    // All should return non-null (model is trained)
+    expect(direct0, isNotNull);
+    expect(direct2, isNotNull);
+    expect(direct4, isNotNull);
+    expect(flood, isNotNull);
+
+    // More hops should predict longer timeouts
+    expect(direct4!, greaterThan(direct2!));
+    expect(direct2, greaterThan(direct0!));
+
+    // All should be positive
+    expect(direct0, greaterThan(0));
+    expect(direct4, greaterThan(0));
+
+    // Print predictions for visibility
+    debugPrint('Predictions (with 1.5x safety margin):');
+    debugPrint('  0-hop direct: ${direct0}ms');
+    debugPrint('  2-hop direct: ${direct2}ms');
+    debugPrint('  4-hop direct: ${direct4}ms');
+    debugPrint('  flood:        ${flood}ms');
+  });
+
+  test('returns null before minimum observations', () {
+    for (var i = 0; i < TimeoutPredictionService.minObservations - 1; i++) {
+      service.recordObservation(
+        contactKey: 'abc',
+        pathLength: 0,
+        messageBytes: 50,
+        tripTimeMs: 2000,
+      );
+    }
+
+    expect(service.hasModel, isFalse);
+    expect(service.predictTimeout(pathLength: 0, messageBytes: 50), isNull);
+  });
+
+  test('caps observations at maxObservations', () {
+    for (var i = 0; i < TimeoutPredictionService.maxObservations + 20; i++) {
+      service.recordObservation(
+        contactKey: 'abc',
+        pathLength: 0,
+        messageBytes: 50,
+        tripTimeMs: 2000 + i,
+      );
+    }
+
+    expect(
+      service.observationCount,
+      equals(TimeoutPredictionService.maxObservations),
+    );
+  });
+
+  test('blends per-contact stats after enough observations', () {
+    // Train with mixed contacts and varied features:
+    // contactA is fast (0-hop), contactB is slow (2-hop)
+    for (var i = 0; i < 12; i++) {
+      service.recordObservation(
+        contactKey: 'contactA',
+        pathLength: 0,
+        messageBytes: 30 + i,
+        tripTimeMs: 1500,
+      );
+      service.recordObservation(
+        contactKey: 'contactB',
+        pathLength: 2,
+        messageBytes: 30 + i,
+        tripTimeMs: 8000,
+      );
+    }
+
+    final predA = service.predictTimeout(
+      contactKey: 'contactA',
+      pathLength: 0,
+      messageBytes: 50,
+    );
+    final predB = service.predictTimeout(
+      contactKey: 'contactB',
+      pathLength: 0,
+      messageBytes: 50,
+    );
+
+    expect(predA, isNotNull);
+    expect(predB, isNotNull);
+    // Contact B (slow) should have a higher predicted timeout than A (fast)
+    expect(predB!, greaterThan(predA!));
+
+    debugPrint('Per-contact blending:');
+    debugPrint('  contactA (fast): ${predA}ms');
+    debugPrint('  contactB (slow): ${predB}ms');
+  });
+}
+
+DeliveryObservation _obs({
+  required int pathLength,
+  required int messageBytes,
+  required int deliveryMs,
+  String contactKey = 'test_contact',
+}) {
+  return DeliveryObservation(
+    contactKey: contactKey,
+    pathLength: pathLength,
+    messageBytes: messageBytes,
+    secondsSinceLastRx: 5,
+    isFlood: pathLength < 0,
+    deliveryMs: deliveryMs,
+    timestamp: DateTime.now(),
+  );
+}