Came here to say this. A push notification to an app or Slack/Discord. Or even a light.
I know the S in IoT means safety/security, but there must be things that can be done for urgent notification.
I doubt they have Slack or Discord and I bet there is nobody who constantly watches a light.
You know what they all have? An email account
> A push notification to an app or Slack/Discord
Wtf?
I must have missed the memo where Slack Discord or “apps“ became suitable for safety critical task. Must be what USA has tried to use just before grounding all planes.