All based on a dart backend connecting to a webapp


<br>

link at <a href="https://www.hivemq.com/blog/mqtt-client-library-mqtt-dart/">https://www.hivemq.com/blog/mqtt-client-library-mqtt-dart/</a>

and <br>

<a href="https://github.com/jnguillerme/mqtt.dart">https://github.com/jnguillerme/mqtt.dart</a>