The sensor is working and receaving a signal of an Bresser temperatur & humidity sensor.
For testing, if other frequencies around my house are used from other weather sensors, i tried in both installations changing the frequencie - which has not worked. I tried all commands, at least one schould work, i think!
Also mentioned in the documentation is an activated HaDiscovery, wicht also not doing nothing in my device.
That’s good news, hopefully it’s your Bresser temperatur & humidity sensor
It really depends in which country you are in. Depending on the location only specific frequencies are legal. So if you are in a 433MHz region, and that’s the one the Bresser sensor is transmitting on, there is not really a good chance to find and pick up any 315 MHz sensors around you, as they would not legally be sold in your country. Or vice versa if you are in a 315 MHz region.
As I personally don’t have any experience with HA Discovery someone else would need to comment on this.