I was able to get the MQTT Poly to work with switches using "ON" or "OFF" as the message payload.
What about the message format for the other node types? For example, I was trying to experiment with a temperature sensor node. It shows up in the admin console just fine, but I am unable to figure out what the message payload format for this node type. Is there documentation anywhere that shows the message payload format for the various node types that this poly supports?