Trying to build a Dashboard that would show disconnected devices, and battery life for all of my devices, not quite sure how to get started. Anyone done this or got any hints
The dashboard for batteries is easy. Just create the dashboard, select the battery powered devices you want to monitor, and select the battery "template" when you add the tiles to the dashboard.
As for disconnected devices, inherently, if they're disconnected, they aren't talking to the HE. You will need something like [RELEASE] Device Watchdog to monitor and alert for devices that are no longer responding.
Device Watchdog also allows you to create a dashboard tile that lists all your disconnected devices...