Sensor fleet telemetry

The problem

A fleet of distributed sensors needed to report readings continuously and surface anomalies without an operator watching raw logs.

What we did

• ESP32 firmware sampling sensors and publishing to an MQTT broker on a fixed cadence
• Backend ingesting the stream and persisting time-series data
• Realtime web dashboard with live values, historical charts, and threshold alerts

Stack

Outcome

Operators see live device state and historical trends in one dashboard, with alerts firing on out-of-range readings instead of manual log checks.