Mqtt

http://mosquitto.org/download/

https://github.com/eclipse/mosquitto

https://www.baldengineer.com/mqtt-introduction.html message broker for IoT.

https://www.baldengineer.com/mqtt-tutorial.html

[Raspberry_pi qt5 gui on lcd for raspberry with mosquito mqtt messaging broker for IoT by baldengineer.com

links
CAN bus

chibios in [ESC speed control

Raspberry pi

State machine