Hi,
OpenWB has it’s own MQTT server.
So you can either configure a second MQTT Broker thing in Openhab (what I did), or use Mosqitto as an MQTT bridge. Then, you will get the payload via Mosquitto. But this needs configuration in Mosquitto.
For OpenWB MQTT data see
OpenWB MQTT forum thread
I got it running within minutes.
Joerg
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