Initial commit: MeshCore Open Flutter client

Open-source Flutter client for MeshCore LoRa mesh networking devices. Features: - BLE device scanning and connection - Nordic UART Service (NUS) integration - Material 3 design with system theme support - Provider-based state management - Placeholder screens for chat, contacts, and settings 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2026-07-28 06:26:39 +10:00 · 2025-12-26 11:42:02 -07:00
commit e7a5b9e209
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+enum LoRaBandwidth {
+  bw7_8(7800, '7.8 kHz'),
+  bw10_4(10400, '10.4 kHz'),
+  bw15_6(15600, '15.6 kHz'),
+  bw20_8(20800, '20.8 kHz'),
+  bw31_25(31250, '31.25 kHz'),
+  bw41_7(41700, '41.7 kHz'),
+  bw62_5(62500, '62.5 kHz'),
+  bw125(125000, '125 kHz'),
+  bw250(250000, '250 kHz'),
+  bw500(500000, '500 kHz');
+
+  final int hz;
+  final String label;
+
+  const LoRaBandwidth(this.hz, this.label);
+}
+
+enum LoRaSpreadingFactor {
+  sf5(5, 'SF5'),
+  sf6(6, 'SF6'),
+  sf7(7, 'SF7'),
+  sf8(8, 'SF8'),
+  sf9(9, 'SF9'),
+  sf10(10, 'SF10'),
+  sf11(11, 'SF11'),
+  sf12(12, 'SF12');
+
+  final int value;
+  final String label;
+
+  const LoRaSpreadingFactor(this.value, this.label);
+}
+
+enum LoRaCodingRate {
+  cr4_5(5, '4/5'),
+  cr4_6(6, '4/6'),
+  cr4_7(7, '4/7'),
+  cr4_8(8, '4/8');
+
+  final int value;
+  final String label;
+
+  const LoRaCodingRate(this.value, this.label);
+}
+
+class RadioSettings {
+  final double frequencyMHz;
+  final LoRaBandwidth bandwidth;
+  final LoRaSpreadingFactor spreadingFactor;
+  final LoRaCodingRate codingRate;
+  final int txPowerDbm;
+
+  RadioSettings({
+    required this.frequencyMHz,
+    required this.bandwidth,
+    required this.spreadingFactor,
+    required this.codingRate,
+    required this.txPowerDbm,
+  });
+
+  // Preset configurations
+  static RadioSettings get preset915MHz => RadioSettings(
+        frequencyMHz: 915.0,
+        bandwidth: LoRaBandwidth.bw125,
+        spreadingFactor: LoRaSpreadingFactor.sf7,
+        codingRate: LoRaCodingRate.cr4_5,
+        txPowerDbm: 20,
+      );
+
+  static RadioSettings get preset868MHz => RadioSettings(
+        frequencyMHz: 868.0,
+        bandwidth: LoRaBandwidth.bw125,
+        spreadingFactor: LoRaSpreadingFactor.sf7,
+        codingRate: LoRaCodingRate.cr4_5,
+        txPowerDbm: 14,
+      );
+
+  static RadioSettings get preset433MHz => RadioSettings(
+        frequencyMHz: 433.0,
+        bandwidth: LoRaBandwidth.bw125,
+        spreadingFactor: LoRaSpreadingFactor.sf7,
+        codingRate: LoRaCodingRate.cr4_5,
+        txPowerDbm: 20,
+      );
+
+  static RadioSettings get presetLongRange => RadioSettings(
+        frequencyMHz: 915.0,
+        bandwidth: LoRaBandwidth.bw125,
+        spreadingFactor: LoRaSpreadingFactor.sf12,
+        codingRate: LoRaCodingRate.cr4_8,
+        txPowerDbm: 20,
+      );
+
+  static RadioSettings get presetFastSpeed => RadioSettings(
+        frequencyMHz: 915.0,
+        bandwidth: LoRaBandwidth.bw500,
+        spreadingFactor: LoRaSpreadingFactor.sf7,
+        codingRate: LoRaCodingRate.cr4_5,
+        txPowerDbm: 20,
+      );
+
+  int get frequencyHz => (frequencyMHz * 1000).round();
+  int get bandwidthHz => bandwidth.hz;
+  int get sf => spreadingFactor.value;
+  int get cr => codingRate.value;
+}