This put me on the right track. Those tests didn’t work. Then I removed the mqtt integration, but didn’t use the “discovered” mqtt integration, but added one myself and put in the 127.0.0.1 IP (or the network IP of course) and this worked.
Apparently when you add the “discovered” mqtt integration it doesn’t configure the mqtt integration correctly. It doesn’t offer you to put in the IP address. Bug it seems…
I’m going to test and see if discovery does work with the new configuration.
Thanks so far!