WeMo Mini Plug not controllable in ST App

[JDRoberts]

Multiple reports in the forum that WeMo switches stopped working with SmartThings about two weeks ago when the firmware was updated.

What's going on with Wemo switches? Working fine for 3yrs (April 2019)

Anyone else have Wemo switches? I have a few Wemo switches and they are not working properly with SmartThings now. I’ve had them for about 3 yrs and they randomly just start causing problems. I can turn them on with a big lag but then they will still register as the switch being off when they actually turned on in the ST app. Can’t turn them off once they are on though. I’ve been having to use the Wemo app which works fine with all the Wemo switches. I am thinking it started when the switches received a firmware update.

Also, your second thought was correct: if the main switch trips the GFI, then the Wemo wouldn’t have any power to send a message to smartthings.

There are monitoring smartapps you can set up that can let you know if you have heard nothing From a particular device for a time period You specify so that might help, but that’s a whole separate conversation.