I did publish the topic as instructed and it was received by the Subscribe in MQTT.fx but the relay didn’t turn on.
At this point I don’t actually have a openHAB Item linked to the discovered thing.
OH3 did discover 3 nodes and created channels for them as seen here.
But none of the channels have items linked.
The channel or node named SwitchIn is actually a physical pushbutton switch attached to GPIO13 and
the ESPEasy software has a Rule telling the relay to turn on when the Switch goes low.
I do this so the relay doesn’t require the broker to be controlled.
Normally before attempting to use the homie convention I would send a MQTT command from OH to the relay or GPIO Pin the relay is attached to, thus controlling the relay with OH as well as the ability to just press the button on the device it’s self.
I could test using MQTT.fx by publishing this and it would turn on the relay.
But now I don’t know what the payload should be.
As mentioned the Topic = homie/ESP3812C3/Relay/power/set
Payload Message = true
Doesn’t do anything.
I feel like I should give up on homie but I like the idea of devices being auto generated.