fix: MQTT connect - disable autoReconnect during trial, retry on all-fail

Matthias Nott

2026-03-22 b99c5995b8a2c028960c472e0f706d75c89de5d1

fix: MQTT connect - disable autoReconnect during trial, retry on all-fail

 lib/services/mqtt_service.dart
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@@ -114,10 +114,14 @@
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       }
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     }
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-    // All hosts failed
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-    debugPrint('MQTT: all hosts failed');
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-    _setStatus(ConnectionStatus.disconnected);
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-    onError?.call('Failed to connect to MQTT broker');
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+    // All hosts failed — retry after delay
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+    _mqttLog('MQTT: all hosts failed, retrying in 5s');
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+    _setStatus(ConnectionStatus.reconnecting);
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+    Future.delayed(const Duration(seconds: 5), () {
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+      if (!_intentionalClose && _status != ConnectionStatus.connected) {
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+        connect();
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+      }
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+    });
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   }
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   /// Returns [localHost, remoteHost] for dual-connect attempts.
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@@ -134,7 +138,7 @@
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     try {
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       final client = MqttServerClient.withPort(host, clientId, config.port);
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       client.keepAlivePeriod = 30;
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-      client.autoReconnect = true;
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+      client.autoReconnect = false; // Don't auto-reconnect during trial — enable after success
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       client.connectTimeoutPeriod = timeout;
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       client.logging(on: true);
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@@ -162,6 +166,7 @@
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       final result = await client.connect();
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       _mqttLog('MQTT: connect result=${result?.state}');
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       if (result?.state == MqttConnectionState.connected) {
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+        client.autoReconnect = true; // Now enable auto-reconnect for the live connection
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         return true;
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       }
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       _client = null;