Non-responsive device as a trigger / condition


Does anyone know of a way to be notified that a battery powered device is dead?
The battery level itself isn't a great indicator - and I don't want to change the battery until it is actually dead.

I was thinking, most if not all of my devices are constantly reporting temperature. So maybe set up some rules to test if the temperature has changed in the last 6 hours. If not, the device is likely dead.

Would anyone have a better / less hacky method?



You can also do that from HSM.


@SmartHomePrimer @Ryan780 Thank you both for the suggestions!