Enhance location handling and UI updates

- Refactor location permission handling in SparseLocationLogger
- Add updateMyLocation method to SparseLocationLogger
- Introduce new contact handling in MeshCoreConnector
- Update map screen with a new option to refresh location
- Add localization for "Update Location" in app_en.arb
- Adjust payload types in meshcore_protocol.dart

lib/connector/meshcore_connector.dart

@@ -2,7 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:crypto/crypto.dart' as crypto;
-import 'package:geolocator_platform_interface/src/models/position.dart';
+import 'package:geolocator/geolocator.dart';
 import 'package:meshcore_open/services/sparse_location_logger.dart';
 import 'package:pointycastle/export.dart';
 import 'package:flutter/foundation.dart';
@@ -1699,6 +1699,11 @@ class MeshCoreConnector extends ChangeNotifier {
         _isLoadingContacts = true;
         notifyListeners();
         break;
+      case pushCodeNewAdvert:
+        debugPrint('Got New CONTACT');
+        // It the same format as respCodeContact, so we can reuse the handler
+        _handleContact(frame);
+        break;
       case respCodeContact:
         debugPrint('Got CONTACT');
         _handleContact(frame);
@@ -1743,6 +1748,7 @@ class MeshCoreConnector extends ChangeNotifier {
       case pushCodeStatusResponse:
         break;
       case pushCodeLogRxData:
+        _handleRxData(frame);
         _handleLogRxData(frame);
         break;
       case respCodeChannelInfo:
@@ -1756,6 +1762,7 @@ class MeshCoreConnector extends ChangeNotifier {
         break;
       case respCodeCustomVars:
         _handleCustomVars(frame);
+        break;
       default:
         debugPrint('Unknown frame code: $code');
     }
@@ -2011,6 +2018,76 @@ class MeshCoreConnector extends ChangeNotifier {
     }
   }
 
+  void _handleContactAdvert(Contact contact) {
+    if (contact.type == advTypeRepeater) {
+      _contactUnreadCount.remove(contact.publicKeyHex);
+      _unreadStore.saveContactUnreadCount(
+        Map<String, int>.from(_contactUnreadCount),
+      );
+    }
+    // Check if this is a new contact
+    final isNewContact = !_knownContactKeys.contains(contact.publicKeyHex);
+    final existingIndex = _contacts.indexWhere(
+      (c) => c.publicKeyHex == contact.publicKeyHex,
+    );
+
+    if (existingIndex >= 0) {
+      final existing = _contacts[existingIndex];
+      final mergedLastMessageAt =
+          existing.lastMessageAt.isAfter(contact.lastMessageAt)
+          ? existing.lastMessageAt
+          : contact.lastMessageAt;
+
+      appLogger.info(
+        'Refreshing contact ${contact.name}: devicePath=${contact.pathLength}, existingOverride=${existing.pathOverride}',
+        tag: 'Connector',
+      );
+
+      // CRITICAL: Preserve user's path override when contact is refreshed from device
+      _contacts[existingIndex] = contact.copyWith(
+        lastMessageAt: mergedLastMessageAt,
+        pathOverride: existing.pathOverride, // Preserve user's path choice
+        pathOverrideBytes: existing.pathOverrideBytes,
+      );
+
+      appLogger.info(
+        'After merge: pathOverride=${_contacts[existingIndex].pathOverride}, devicePath=${_contacts[existingIndex].pathLength}',
+        tag: 'Connector',
+      );
+    } else {
+      _contacts.add(contact);
+      appLogger.info(
+        'Added new contact ${contact.name}: pathLen=${contact.pathLength}',
+        tag: 'Connector',
+      );
+    }
+    _knownContactKeys.add(contact.publicKeyHex);
+    _loadMessagesForContact(contact.publicKeyHex);
+
+    // Add path to history if we have a valid path
+    if (_pathHistoryService != null && contact.pathLength >= 0) {
+      _pathHistoryService!.handlePathUpdated(contact);
+    }
+
+    notifyListeners();
+
+    // Show notification for new contact (advertisement)
+    if (isNewContact && _appSettingsService != null) {
+      final settings = _appSettingsService!.settings;
+      if (settings.notificationsEnabled && settings.notifyOnNewAdvert) {
+        _notificationService.showAdvertNotification(
+          contactName: contact.name,
+          contactType: contact.typeLabel,
+          contactId: contact.publicKeyHex,
+        );
+      }
+    }
+
+    if (!_isLoadingContacts) {
+      unawaited(_persistContacts());
+    }
+  }
+
   Future<void> _persistContacts() async {
     await _contactStore.saveContacts(_contacts);
   }
@@ -3296,20 +3373,133 @@ class MeshCoreConnector extends ChangeNotifier {
   }
 
   _updateLocationandAdvert(Position position) async {
-    double lat = position.latitude;
+    final snapToGridCenter = _sparseLocationLogger?.snapToGridCenter(
-    double lon = position.longitude;
+      position: position,
+      cellSizeMeters: 0.001,
+    );
+    double lat = snapToGridCenter?.latitude ?? 0.0;
+    double lon = snapToGridCenter?.longitude ?? 0.0;
 
     if (lat == 0.0 && lon == 0.0) {
-      // Invalid location
+      debugPrint('Invalid location (0,0), skipping advert');
       return;
     }
-    lat = double.parse(lat.toStringAsFixed(3)) - 0.00015;
+
-    lon = double.parse(lon.toStringAsFixed(3)) - 0.00015;
+    await sendFrame(buildSetOtherParamsFrame(true, 1, 1, 0));
-    print('Updating location to lat: $lat, lon: $lon');
-    await sendFrame(buildSetOtherParamsFrame(true, 0, 1, 0));
     await setNodeLocation(lat: lat, lon: lon);
     await sendSelfAdvert(flood: true);
-    await sendFrame(buildDeviceQueryFrame());
+    _selfLatitude = lat;
+    _selfLongitude = lon;
+    notifyListeners();
+  }
+
+  void _handleRxData(Uint8List frame) {
+    final packet = BufferReader(frame);
+    packet.skipBytes(3); // Skip frame type byte
+    //final snr = packet.readByte() / 4.0;
+    //final rssi = packet.readByte();
+    final header = packet.readByte();
+    //final routeType = header & 0x03;
+    final payloadType = (header >> 2) & 0x0F;
+    //final payloadVer = (header >> 6) & 0x03;
+
+    if (packet.remaining <= 0) return;
+    final pathLen = packet.readByte();
+
+    if (packet.remaining < pathLen) return;
+    final pathBytes = packet.readBytes(pathLen);
+
+    if (packet.remaining <= 0) return;
+    final payload = packet.readBytes(packet.remaining);
+
+    switch (payloadType) {
+      case payloadTypeADVERT:
+        _handlePayloadAdvertReceived(payload, pathBytes);
+        break;
+      default:
+    }
+  }
+
+  void _handlePayloadAdvertReceived(Uint8List frame, Uint8List path) {
+    final advert = BufferReader(frame);
+    if (advert.remaining <= 32) return;
+    final publicKey = advert.readBytes(32);
+    final contactKeyHex = publicKey
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join();
+    if (advert.remaining <= 4) return;
+    final timestamp = advert.readInt32LE();
+    if (advert.remaining <= 64) return;
+    advert.skipBytes(64); // Skip signature for now
+    if (advert.remaining <= 1) return;
+    final flags = advert.readByte();
+    final type = flags & 0x0F;
+    final hasLocation = (flags & 0x10) != 0;
+    //final hasFeature1 = (flags & 0x20) != 0;
+    //final hasFeature2 = (flags & 0x40) != 0;
+    final hasName = (flags & 0x80) != 0;
+    double latitude = 0.0;
+    double longitude = 0.0;
+    if (hasLocation && advert.remaining >= 8) {
+      latitude = advert.readInt32LE() / 1e6;
+      longitude = advert.readInt32LE() / 1e6;
+    }
+    String name = '';
+    if (hasName && advert.remaining > 0) {
+      name = advert.readString();
+    }
+    // Check if this is a new contact
+    final isNewContact = !_knownContactKeys.contains(contactKeyHex);
+    if (isNewContact) {
+      _handleContactAdvert(
+        Contact(
+          publicKey: publicKey,
+          name: name,
+          type: type,
+          pathLength: path.length,
+          path: path,
+          latitude: latitude,
+          longitude: longitude,
+          lastSeen: DateTime.fromMillisecondsSinceEpoch(timestamp * 1000),
+        ),
+      );
+      return;
+    }
+
+    final existingIndex = _contacts.indexWhere(
+      (c) => c.publicKeyHex == contactKeyHex,
+    );
+
+    if (existingIndex >= 0) {
+      final existing = _contacts[existingIndex];
+      final mergedLastMessageAt = existing.lastMessageAt.isAfter(DateTime.now())
+          ? DateTime.now()
+          : existing.lastMessageAt;
+
+      appLogger.info(
+        'Refreshing contact ${existing.name}: devicePath=${existing.pathLength}, existingOverride=${existing.pathOverride}',
+        tag: 'Connector',
+      );
+
+      // CRITICAL: Preserve user's path override when contact is refreshed from device
+      _contacts[existingIndex] = existing.copyWith(
+        latitude: hasLocation ? latitude : existing.latitude,
+        longitude: hasLocation ? longitude : existing.longitude,
+        name: hasName ? name : existing.name,
+        path: path,
+        pathLength: path.length,
+        lastMessageAt: mergedLastMessageAt,
+        lastSeen: DateTime.fromMillisecondsSinceEpoch(timestamp * 1000),
+        pathOverride: existing.pathOverride, // Preserve user's path choice
+        pathOverrideBytes: existing.pathOverrideBytes,
+      );
+
+      appLogger.info(
+        'After merge: pathOverride=${_contacts[existingIndex].pathOverride}, devicePath=${_contacts[existingIndex].pathLength}',
+        tag: 'Connector',
+      );
+      notifyListeners();
+    }
   }
 }
 

lib/connector/meshcore_protocol.dart

@@ -213,6 +213,30 @@ const int advTypeRepeater = 2;
 const int advTypeRoom = 3;
 const int advTypeSensor = 4;
 
+// Payload Types
+const int payloadTypeREQ =
+    0x00; // request (prefixed with dest/src hashes, MAC) (enc data: timestamp, blob)
+const int payloadTypeRESPONSE =
+    0x01; // response to REQ or ANON_REQ (prefixed with dest/src hashes, MAC) (enc data: timestamp, blob)
+const int payloadTypeTXTMSG =
+    0x02; // a plain text message (prefixed with dest/src hashes, MAC) (enc data: timestamp, text)
+const int payloadTypeACK = 0x03; // a simple ack
+const int payloadTypeADVERT = 0x04; // a node advertising its Identity
+const int payloadTypeGRPTXT =
+    0x05; // an (unverified) group text message (prefixed with channel hash, MAC) (enc data: timestamp, "name: msg")
+const int payloadTypeGRPDATA =
+    0x06; // an (unverified) group datagram (prefixed with channel hash, MAC) (enc data: timestamp, blob)
+const int payloadTypeANONREQ =
+    0x07; // generic request (prefixed with dest_hash, ephemeral pub_key, MAC) (enc data: ...)
+const int payloadTypePATH =
+    0x08; // returned path (prefixed with dest/src hashes, MAC) (enc data: path, extra)
+const int payloadTypeTRACE = 0x09; // trace a path, collecting SNI for each hop
+const int payloadTypeMULTIPART = 0x0A; // packet is one of a set of packets
+const int payloadTypeCONTROL = 0x0B; // a control/discovery packet
+//...
+const int payloadTypeRawCustom =
+    0x0F; // custom packet as raw bytes, for applications with custom encryption, payloads, etc
+
 // Sizes
 const int pubKeySize = 32;
 const int maxPathSize = 64;
@@ -780,20 +804,20 @@ Uint8List buildZeroHopContact(Uint8List pubKey) {
 }
 
 // Build CMD_SET_OTHER_PARAMS frame
-// Format: [cmd][allowAutoAddContacts][allowTelemetryFlags][advert_loc_policy][multi_acks]
+// Format: [cmd][allowAutoAddContacts][allowTelemetryFlags][advertLocationPolicy][multiAcks]
 Uint8List buildSetOtherParamsFrame(
   bool allowAutoAddContacts,
   int allowTelemetryFlags,
-  int advert_loc_policy,
+  int advertLocationPolicy,
-  int multi_acks,
+  int multiAcks,
 ) {
   final writer = BufferWriter();
   writer.writeByte(cmdSetOtherParams);
   writer.writeByte(
-    allowAutoAddContacts ? 0x01 : 0x00,
+    allowAutoAddContacts ? 0x00 : 0x01,
   ); // Allow Auto Add Contacts
   writer.writeByte(allowTelemetryFlags); // Allow Telemetry Flags
-  writer.writeByte(advert_loc_policy); // Advertisement Location Policy
+  writer.writeByte(advertLocationPolicy); // Advertisement Location Policy
-  writer.writeByte(multi_acks); // Multi Acknowledgements
+  writer.writeByte(multiAcks); // Multi Acknowledgements
   return writer.toBytes();
 }

lib/l10n/app_en.arb

@@ -619,6 +619,7 @@
   "map_sharedPin": "Shared pin",
   "map_joinRoom": "Join Room",
   "map_manageRepeater": "Manage Repeater",
+  "map_updateMyLocation": "Update Location",
   "mapCache_title": "Offline Map Cache",
   "mapCache_selectAreaFirst": "Select an area to cache first",
   "mapCache_noTilesToDownload": "No tiles to download for this area",

lib/screens/map_screen.dart

@@ -275,6 +275,17 @@ class _MapScreenState extends State<MapScreen> {
                         ),
                       ),
                     ),
+                    PopupMenuItem(
+                      child: Row(
+                        children: [
+                          const Icon(Icons.refresh),
+                          const SizedBox(width: 8),
+                          Text(context.l10n.map_updateMyLocation),
+                        ],
+                      ),
+                      onTap: () =>
+                          connector.sparseLocationLogger?.updateMyLocation(),
+                    ),
                   ],
                   icon: const Icon(Icons.more_vert),
                 ),

lib/screens/settings_screen.dart

@@ -3,7 +3,6 @@ import 'package:meshcore_open/utils/gpx_export.dart';
 import 'package:meshcore_open/widgets/elements_ui.dart';
 import 'package:provider/provider.dart';
 import 'package:package_info_plus/package_info_plus.dart';
-import 'package:meshcore_open/services/sparse_location_logger.dart';
 
 import '../connector/meshcore_connector.dart';
 import '../connector/meshcore_protocol.dart';

lib/services/sparse_location_logger.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:io';
 import 'dart:math' as math;
 
+import 'package:flutter/widgets.dart';
 import 'package:geolocator/geolocator.dart';
 import 'package:gpx/gpx.dart';
 import 'package:path_provider/path_provider.dart';
@@ -34,17 +35,24 @@ class SparseLocationLogger {
     _onNewLogPoint = onNewLogPoint;
   }
 
-  Future<void> startLogging() async {
+  Future<bool> getPremissons() async {
     // Permissions & service check (same as before)
     var status = await Permission.location.request();
     if (!status.isGranted) {
-      print('Location permission denied');
+      debugPrint('Location permission denied');
-      return;
+      return false;
     }
 
     bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
     if (!serviceEnabled) {
-      print('Location services disabled');
+      debugPrint('Location services disabled');
+      return false;
+    }
+    return true;
+  }
+
+  Future<void> startLogging() async {
+    if (!await getPremissons()) {
       return;
     }
 
@@ -92,7 +100,7 @@ class SparseLocationLogger {
     _lastHeading = null;
     _lastLoggedTime = null;
 
-    print('Sparse GPX logging started → ${_gpxFile?.path}');
+    debugPrint('Sparse GPX logging started → ${_gpxFile?.path}');
   }
 
   Future<void> stopLogging() async {
@@ -107,7 +115,7 @@ class SparseLocationLogger {
 
       await _gpxFile?.writeAsString(xmlString);
 
-      final result = await SharePlus.instance.share(
+      await SharePlus.instance.share(
         ShareParams(
           text: 'Sparse GPS track',
           subject: 'Sparse GPS track',
@@ -118,7 +126,20 @@ class SparseLocationLogger {
       await _gpxFile?.delete();
     }
 
-    print('Logging stopped');
+    debugPrint('Logging stopped');
+  }
+
+  Future<void> updateMyLocation() async {
+    if (!await getPremissons()) {
+      return;
+    }
+
+    try {
+      final position = await Geolocator.getCurrentPosition();
+      _onNewLogPoint?.call(position);
+    } catch (e) {
+      debugPrint('Error updating location: $e');
+    }
   }
 
   Future<void> _onPositionReceived(Position position) async {
@@ -176,30 +197,30 @@ class SparseLocationLogger {
 
       _currentSegment.trkpts.add(pt);
       _onNewLogPoint?.call(position);
-      print('Logged point: ${pt.lat}, ${pt.lon} ($reason)');
+      debugPrint('Logged point: ${pt.lat}, ${pt.lon} ($reason)');
 
       _lastLoggedPosition = position;
       _lastHeading = heading;
       _lastLoggedTime = now;
     } else {
-      print('Skipped point: ${position.latitude}, ${position.longitude}');
+      debugPrint('Skipped point: ${position.latitude}, ${position.longitude}');
     }
   }
 
   Position snapToGridCenter({
     required Position position,
-    required double cellSizeDegrees, // e.g. 0.01 ≈ 1.1 km, 0.001 ≈ 110 m
+    required double cellSizeMeters,
   }) {
     Position snappedPosition = position;
     // Snap latitude
     final latFloor =
-        (position.latitude / cellSizeDegrees).floor() * cellSizeDegrees;
+        (position.latitude / cellSizeMeters).floor() * cellSizeMeters;
-    final snappedLat = latFloor + (cellSizeDegrees / 2);
+    final snappedLat = latFloor + (cellSizeMeters / 2);
 
     // Snap longitude
     final lonFloor =
-        (position.longitude / cellSizeDegrees).floor() * cellSizeDegrees;
+        (position.longitude / cellSizeMeters).floor() * cellSizeMeters;
-    final snappedLon = lonFloor + (cellSizeDegrees / 2);
+    final snappedLon = lonFloor + (cellSizeMeters / 2);
 
     snappedPosition = Position(
       latitude: snappedLat,