Device not reporting in for a set amount of time

Another feature that would be useful (at least for me) would a second configurable duration of time where if no events are posted from any device, they system is presumed to be offline and a “system down” message can be sent out. I understand that through the app the hub already does this, but I’m looking for a way to accomplish that notification with SMS outside of having to look at the app. If there is an alternative way to determine the hub is offline (through the Hub Inactive event that is reported) I would be all for it:

Also, events that SmartThings sensors report that are not a change in value from the previous report (the temp is the same as the last temp event) are not picked up by this app and the device appears inactive. More info about those events here: