"No matching entities found" when adding temperature sensor to room

[atnas]

I’m trying to add a temperature measurement to my room.
When editing the room there’s a dropdown to choose the temperature sensor

In my case it says “No matching entities found”.
However, I have a climate sensor with a current_temperature attribute (and a templated version of this only reporting the temperature)

Both of these sensors are set to belong to the room I’m trying to add them to, but they don’t show up.
Does anyone have an idea what could be wrong?

[petro]

That sensor is missing device_class, that’s likely needed for the areas dashboard. If you made that as a template sensor, make sure you have a device_class and state_class set. I doubt state_class is a requirement, however it’s good to have to unlock any features that require a state_class.

[atnas]

Thank you so much! Only device_class was not enough, but both made it work!