@Solla-topee I don't think weak wifi makes sense as a hypothesis. The switches worked for months before this, and the three switches that all failed together were far apart from each other. One only...

@Solla-topee Hi, They LED status on the 2 HS200 and the one HS210 was red. Today I removed them from my app, fully reset them, and re-added them. It's just so strange that the of them, all on...

Sometime today all my HS200 switches (3 of them) went offline, while my dimmer switch (I forget the model) works. I've tried resetting one (held reset 5s until it blinked) to no avail - it blinks...