I have posted a question regarding what i think could be the fix to my issue over at: https://community.openhab.org/t/push-state-of-one-mqtt-topic-to-another/27597 Not sure if it will become of anything though. If anyone else has any experience with MQTT and openhab2 over here, then please be sure to shout a thought. It seems that not many people have got this sketch to work with openhab, google searches are bringing up posts from a year or two ago made on our forum here regarding this issue with no clear/simple solution.