Hello James,
your setup is rather specific and hard to understand. Before going into more detail, did you make sure that all systems are set up correctly?
After countless threads regarding initial configuration issues, here is a short guide on how to get started with MQTT, the MQTT binding and openHAB.
This thread is a wiki article and can be improved by everyone. Please do!
MQTT is a machine-to-machine (M2M)/“Internet of Things” connectivity protocol.
It was designed as an extremely lightweight publish/subscribe messaging transport.
A few resources first:
Read all you ever need to know about MQTT in the MQTT Essentials
The openHAB MQT…