That's an excellent documentation, in my opinion. Extensive and complete. As an example: It doesn't just say: 'Can use MQTT.'. Instead it details the usage of

That's an excellent documentation, in my opinion. Extensive and complete. As an example: It doesn't just say: 'Can use MQTT.'. Instead it details the usage of MQTT by the appplication and even how to set up an MQTT service on a Rasperry Pi. It details common usage scenarios.