I understand this is a common problem, however none of the topics I have read answer my questions. What exactly do I have to do in order to get this working? I have (I think) a MQTT server running, and OpenHab seems to like it, but when I start the client MQTT.fx, Openhab throws an error every 2 s…

You are probably using the same client id as openHAB when you connect with MQTT.fx. Each client must have a unique id and at least with Mosquitto it will kick OH off the broker when another client connects with the same id.

MQTT disconnects

Setup, Configuration and Use Installation

sihui (SiHui) September 30, 2017, 6:59am 2

This is always a good starting point: