IoT Telemetry Platform

Readings were collected by hand from devices in the field, so problems were only discovered days after they happened.

Firmware batches readings and publishes over MQTT with a store-and-forward buffer for dropouts. An ingest service normalises and writes to a time-series store; the dashboard subscribes to a websocket channel fed by the same pipeline.

Operators see device state within seconds, and the buffer means a lost uplink no longer means lost data.