With the deadline coming close, I did a first test drive for a IoT air humidifier:
The sensor node measures temperature and humidity and publishes them to the topics Bittailor/PiOne/Node1/Sensors/Temperature
The actor node subscribes to the topic Bittailor/PiOne/Node2/Actor/Switch to control the LED which acts as Humidifier.
The MQTT-SN messages are sent over the wireless sensor network to the MQTT-SN gateway running on the gateway node. The MQTT-SN gateway I built with Kura forwards them as MQTT messages to the Mosquitto MQTT broker, also running on the gateway.
And finally Node-RED, also running on the gateway, is used to wire the control logic.
So lets make some dry air and see if it works.