MQTT topic not published?

[hafniumzinc (T)]

@mmuk

I’m not convinced that OH is even publishing the ConservHeater topic.

As you have MQTT.fx you should be able to confirm this - can you?

Also, you may have fallen victim to the annoying bug where openHAB sometimes doesn’t properly register changes made to Things files (certainly an OH2 problem, not sure about OH3). You can restart openHAB, or do this.

@mmuk

Using the app or BasicUI the state (as displayed in OH channels) can be toggled

How are you doing the toggling? Your Item is a String, not a Switch? Try changing

String ZBR3_ConservatoryHeater_ACTION "Heater [%s]" {channel="mqtt:topic:584e1eaa63:ConservHeater:state"}

To

Switch ZBR3_ConservatoryHeater_ACTION "Heater [%s]" {channel="mqtt:topic:584e1eaa63:ConservHeater:state"}