I use Companion app push notifications to inform on alarms in HA. I’d like to monitor the health of my notification channel. If something happens, I could be (relatively) sure a notification actually comes.
The companion app might crash, HA might crash, HA/LAN UPS could run dry on power outage, I could have networking issues etc., several ways to block a notification. Are there any solutions to monitor the health of the whole chain from HA to notification actually sounding?
One thing I found in discussions (but cannot find anymore) was an idea of HA setting an alarm in my phone to trigger in 2 hours. It then would reset the time every 10 minutes to be 2 hours again. If the alarm ever rings, something has failed. This monitoring would be independent of HA or companion app. Based on this, Android alarms can be set from HA.
Or is there a ready-made solution?