Is there any way to be alerted that a device is offline by push notification so I can fix it?
There isn’t anything in the official features at the moment, although they’ve said they are working on it, but a number of community members have created “wellness check” smart apps that can do just this. The most popular is probably “simple device viewer” but there are a couple of others as well.
You can find these on the quick browse lists in the community – created wiki under “wellness check.”
The Simple Device Viewer has always been able to send notifications after a specified amount of time with no activity, but I just added a new setting that allows you to get notified within 5 minutes of a device going offline instead of waiting for the last activity to exceed the threshold.