Creating a binary sensor with availability_template

[Olivier1974 (Olivier Toussaint)]

How can this binary_sensor be unknown?

Hello there, I made a template binary_sensor as I don’t want it to be unknown or unavailable (for automation reason) It is based on a smoke detector that could become unavailable or unknown, that is the reason why I had to do that. My sensor is template: - binary_sensor: - name: fumee_rdc device_class: smoke state: > {{ iif(is_state("binary_sensor.smoke_1","on"), "on", "off") }} How could this possibly be unknown? As per the documentation: You should replace {{ …

Look at the solution as I suspect that your black out/no electricity is supposed as rare as my smoke detection.

And if it is your solution as well, don’t forget to like Taras’s post describing it.