[SOLVED] Watchdog Expire Alerting - Hope I Am On The Right Track

That’s right. The Rule keeps on updating the Item so we can’t rely on the ON/OFF commands sent to this Item to know whether it is online because WE are generating the commands, not the device.

There might be something you can use here, in particular the Thing Rule trigger, which I’ve not used so don’t have a good feel for how well it works.