ignore sensor if unavailable

[mortalone]

What is the feature?

so. from time to time i hav a issue with a sensor getting dropped by the zigbee network/controller. and instaed of just ignoring it. the bette thermostat just stops working all together.
let us say my outside thermometer or a window/door sensor is not available. all my thermostats stops working at all (or at least it becoms unavailable in the home assistant UI/system)

it would be nice if the senosor with no value is jist ignored.

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Additional Information

[cl445]

Same here: the batteries in my weather sensor ran out, and the BT stopped working—despite having configured a weather service as a fallback that could have been used.

[bakadave]

plus one, I am running multiple sensors in each room (temperature, door/window) and occasionally some of them get dropped/run out of battery... I want the thermostat to keep working in a "degraded" mode