Notification of device offline

It would be nice to be notified if a camera (or doorbell) is offline, like Ring does with the alarm system. Would not need to be instant (I get the load issues), maybe a periodic ping to the camera every so often. One other way to do it could be for cameras set to upload periodic snapshots, if they quit coming. I am sure Ring can find a way to do this. Just so we would know if an installed camera has gone offline.