Shutoff the breaker?
I have the same issue, my switch was working and suddenly it stopped working, shut off the breaker and it did not help… not sure what to do.
Here are a list of things I can think of:
- Is there any chance that the wire connections have come loose?
- Do you still have the 2.4 ghz wifi that is needed?
- Do you need to upgrade apple homekit interface into HA?
- Do you still have power to line in?
- Are the entities in HA still working?
Hope this helps