First step in debug is checking if there’s any data coming into the mqtt server. Since you state that it’s newly installed that would be my first step. You can use a desktop viewer like MQTT Explorer
I’ve got it working. In the setup of the watermeter I added a prefix (watermeter) that was not needed. I was reading out /watermeter but because of the prefix it was logging to /watermeter/watermeter. Therefor I got no data. Found that out by enabling debug logging in mosquito. Removed the prefix, now it works.
Thanks, but this doesnt help - Status is connected in the distance Meter Menu , mosquitto the Same, but no values of Entities? Thx for any idea! BR uwe