Observability for Air Conditioners: An IoT Story with Talos
summary
Startup Talos IoT deploys a small sensor board per rooftop HVAC and ships temperature and current time series into Prometheus, Cortex, Grafana to run minute‑level fault detection instead of quarterly checks. Alerts use precise rules (suction vs liquid delta, 25°F falling at ~5°F/hour, suction <32°F while compressor amps >1) plus a feeds_last_seen timestamp metric to avoid stale‑data false alarms; one engineer boots a system that scales to hundreds.
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