Hello, my mqtt connections stopped working after OH3 passed. When I check with MQTT.fx, I see the values coming up. [image] This is what I wrote in the item; Number NaturelGas_A_Kitchen “Naturel Gas [%.0f PPM]” (A_Kitchen) {mqtt=“<[broker:kitchen/gas:state:default]” } What kind of sett…

So you moved to OH3 BEFORE making the change from MQTT Version 1 to MQTT Version 2! OH3 does not support any version 1 binding. So now you have to make the move. Start reading the docs!

I try to read the documentation, but I could not see a very detailed explanation. If I catch the trick, I’ll do the rest.

[image] Openhabian 3.0 RC2 migration/upgrade not working Installation Presumably you have configuration files. Use this guide to convert: Tell us exactly which bit you don’t understand, because this is the second time we’ve mentioned to you that MQTT v1 do…

[image] hafniumzinc: Tell us exactly which bit you don’t understand, because this is the second time we’ve mentioned to you that MQTT v1 doesn’t work in OH3! ok i realized that mqtt v1 is not working. But I did not understand how to upgrade the existing to V2. What is missing with mqtt in my …

I think what is missing is that you haven’t read the very specific link we gave you, which very specifically outlines how to convert an MQTT v1 Item into an MQTT v2 Thing and Item - that’s all you need to do. Try converting using the information in the link provided, then if it’s not working show u…

Let’s think like this, how to make a new mqtt V2 connection, please help me on that. I delete the V1 ones, do it again as V2.

MQTT system broker connection settings are empty in OH3. [image]

Please try to understand that the people answering in here might be the same that wrote the documentation. So if they are pointing you to the documentation they are exactly doing what you desire. A search on this forum might as well give lots of hints. This problem has been met by a great amount of…

[image] haybolat: MQTT system broker connection settings are empty in OH3. Good. You don’t need any System Broker Thing unless you use the embedded broker app (Moquette) - and that’s been removed from OH3 for support reasons. You just want an ordinary broker Thing pointing to your pre-exist…

[image] rossko57: Good. You don’t need any System Broker Thing unless you use the embedded broker app (Moquette) - and that’s been removed from OH3 for support reasons. You just want an ordinary broker Thing pointing to your pre-existing MQTT broker, Mosquitto or whatever you use. Ok, Thank …