Is there a way to get a notification when ST determines a device is off line or otherwise not healthy? I see the flag next to the device in the app, but it would be nice to get a noticifation.
I don’t believe they’ve implemented that feature yet.
I think most people are using a SmartApp for that functionality. I think the 2 most popular are Simple Device Viewer and Device Monitor.
Both of them have recently added the ability to use the SmartThings offline status to send notifications instead of relying on just the last activity time.