Hi All. I updated yesterday from OH3.4 to OH4.0.3. Now the previously working MQTT connections are no longer working. I am using MQTT Actions within Rules with Blockly and I am not able to send anything anymore. Was working with OH3.4. Nothing changed on my MQTT broker side. I am using the MQTT …

[image] jesterle: Should I be able to see in the events.log when a MQTT message was sent? I don’t think there are any logs created when using the publishMQTT action unless there is a problem that generates an exception. The MQTT Broker Thing is showing as ONLINE? How are you monitoring the …

Thanks for your answer. Yes, I am monitoring the MQQT traffic. I don’t see anything send from OH towards my MQYY broker. I am using Blockly with the MQTT action, this is actually where I see it breaks. Where is this “list of breaking changes”?

Hi, maybe its too simple to be true for you too, but i pretty much had the same expect for me everything is running on the same machine. Did you restart all services and mosquitto too? Mine was the same, everything was fine, except openhab not to connect to mosquitto initially anymore. Bye

[image] openHAB 4.0 - a new major release is here! Announcements All, It’s late at night over here in Europe, but in on the other side of the atlantic, it is still July 23 - the day that we planned to publish our new major openHAB release! And here we are - a…

Awesome. Thanks a lot. That was the solution. [image] Rules Blockly a vendor and technology agnostic open source automation software for your home

OH 4 - MQTT no longer working after update from OH 3.4

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rlkoshak (Rich Koshak) October 11, 2023, 2:41pm 5

The release notes has the list of breaking changes and what to do about them. The Blockly docs also discusses what you need to do. Rules Blockly | openHAB