Added the basics for path tracing

lib/connector/meshcore_protocol.dart

@@ -127,6 +127,7 @@ const int cmdSendStatusReq = 27;
 const int cmdGetContactByKey = 30;
 const int cmdGetChannel = 31;
 const int cmdSetChannel = 32;
+const int cmdSendTracePath = 36;
 const int cmdGetRadioSettings = 57;
 const int cmdGetTelemetryReq = 39;
 const int cmdGetCustomVar = 40;
@@ -176,6 +177,7 @@ const int pushCodeLoginSuccess = 0x85;
 const int pushCodeLoginFail = 0x86;
 const int pushCodeStatusResponse = 0x87;
 const int pushCodeLogRxData = 0x88;
+const int pushCodeTraceData = 0x89;
 const int pushCodeNewAdvert = 0x8A;
 const int pushCodeTelemetryResponse = 0x8B;
 const int pushCodeBinaryResponse = 0x8C;
@@ -708,3 +710,18 @@ Uint8List buildSendBinaryReq(Uint8List repeaterPubKey, {Uint8List? payload}) {
   }
   return writer.toBytes();
 }
+
+//Build a trace request frame
+//[cmd][tag x4][auth x4][flag][payload]
+Uint8List buildTraceReq(int tag, int auth, int flag, {Uint8List? payload})
+{
+  final writer = BufferWriter();
+  writer.writeByte(cmdSendTracePath);
+  writer.writeUInt32LE(tag);
+  writer.writeUInt32LE(auth);
+  writer.writeByte(flag);
+  if (payload != null && payload.isNotEmpty) {
+    writer.writeBytes(payload);
+  }
+  return writer.toBytes();
+}

lib/screens/contacts_screen.dart

@@ -752,7 +752,20 @@ class _ContactsScreenState extends State<ContactsScreen>
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
-            if (isRepeater)
+            if (isRepeater) ...[
+              ListTile(
+                leading: const Icon(Icons.radar, color: Colors.green),
+                title: Text("Ping"),
+                onTap: () async {
+                        final frame = buildTraceReq(
+                          DateTime.now().millisecondsSinceEpoch ~/ 1000,
+                          0,
+                          0,
+                          payload: contact.publicKey.sublist(0,1),
+                        );
+                        await connector.sendFrame(frame);
+                }
+              ),
               ListTile(
                 leading: const Icon(Icons.cell_tower, color: Colors.orange),
                 title: Text(context.l10n.contacts_manageRepeater),
@@ -761,7 +774,20 @@ class _ContactsScreenState extends State<ContactsScreen>
                   _showRepeaterLogin(context, contact);
                 },
               )
-            else if (isRoom) ...[
+            ]else if (isRoom) ...[
+              ListTile(
+                leading: const Icon(Icons.radar, color: Colors.green),
+                title: Text("Ping"),
+                onTap: () async {
+                        final frame = buildTraceReq(
+                          DateTime.now().millisecondsSinceEpoch ~/ 1000,
+                          0,
+                          0,
+                          payload: contact.publicKey.sublist(0,1),
+                        );
+                        await connector.sendFrame(frame);
+                }
+              ),
               ListTile(
                 leading: const Icon(Icons.room, color: Colors.blue),
                 title: Text(context.l10n.contacts_roomLogin),

lib/services/ble_debug_log_service.dart

@@ -156,6 +156,8 @@ class BleDebugLogService extends ChangeNotifier {
         return 'CMD_GET_RADIO_SETTINGS';
       case cmdSetCustomVar:
         return 'CMD_SET_CUSTOM_VAR';
+      case cmdSendTracePath:
+        return 'CMD_SEND_TRACE_PATH';
       default:
         return null;
     }
@@ -195,6 +197,8 @@ class BleDebugLogService extends ChangeNotifier {
         return 'RESP_CODE_CHANNEL_INFO';
       case respCodeRadioSettings:
         return 'RESP_CODE_RADIO_SETTINGS';
+      case pushCodeTraceData: 
+        return 'PUSH_CODE_TRACE_DATA';
       default:
         return null;
     }