Cold-chain temperature monitoring
- Attach temperature probes to a gateway in each freezer.
- Build a dashboard with a value card + trend chart per unit.
- Add a rule:
temperature > -15°Cfor the unit → email + in-app alert, 15-minute cooldown. - Optionally add a webhook action to page on-call staff.
A 1 Hz publish interval is plenty here — see understanding rate limits to size your plan.