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 us your work in progress and we can help!
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 users since the release of MQTT version 2 ( 2years ago).
Without the details what you really did we can’t tell what is missing or wrong.
I guess you have setup your MQTT broker as with version1.
You should have created a MQTT Broker Thing (which should bridge from MQTT to the Things).
You should have created a generic MQTT Thing, connecting to the MQTT Broker Thing. This Thing should have at least the Number channel. How did you setup its “stateTopic” and TansformationPattern?
How did you link the item “outtemperature” to the above channel?
“[OH3] MQTT Setup and Configuration, post:1, topic:111494”]
Overview In order to use MQTT devices, the following is required: An MQTT broker installed MQTT Binding installed in openHAB MQTT Bridge Thing configured in openHAB This tutorial was written with openHAB3 running on a headless Raspberry Pi 3B with Raspberry Pi OS, with SSH access. Method 1. Install the MQTT broker Install Mosquitto On the Raspberry Pi, perform the following commands to install Mosquitto, and ensure it runs when re-starting the Pi: sudo apt install mosquitto sudo systemctl …
Thank you very much. I really like. But Openhab3 also have problem with mqtt broker. If I set system locale to ‘tr_TR.UTF-8’, my mqtt broker setting page is blank. this is a system error. Please let us report this, let’s get it fixed.