I’m coming from OH2.5 where I used the 1.x MQTT binding with an external Mosquitto broker. After a lot of research I found that you need to create a bridge Broker and a Generic MQTT thing and then add channels for each topic. A bit complex to setup, but it works. Now somehow I also have a “MQTT sy…

Thanks, it lead me to the solution. In my case it was the file mqttbroker.config in that $OH_USERDATA/config/org/openhab/ dir (created over a year ago) that was causing the error to show. Deleted it and all is fine now. @Qwerty_Zet I tried your solution too, in my case it didn’t solve it. Toch be…

[image] jwveldhuis: What does this MQTT system broker do, and do I need to configure it? I think that’s a way to set up a “default” MQTT broker connection. You don’t need to do anything there if you create Broker Things. But I’m not really sure. I haven’t messed with it. Have you edited or e…

See post nov 29. [image] openHAB 3.0 Milestone 2 discussion News & Important Changes In OpenHab 3 settings do you see “MQTT Broker connection”? If so, click the link. The info on this page was blocking port 1883 so Mosquitto didn’t connect. I removed all the i…

[image] jwveldhuis: hanks, it lead me to the solution. In my case it was the file mqttbroker.config in that $OH_USERDATA/config/org/openhab/ dir (created over a year ago) that was causing the error to show. Deleted it and all is fine now. @Qwerty_Zet I tried your solution too, in my case it d…

My issue was an error in the log, not an empty settings page. Did you install the MQTT binding?

MQTT broker confusion in OH3

Setup, Configuration and Use Migration

Qwerty_Zet (Qwerty Zet) December 22, 2020, 6:13pm 3

See post nov 29.

Edit: after that, the error message in you log should be gone. Zet hem op