Project / 003
Energy Monitoring System
Household power measurement, protection, and safety telemetry in one ESP32-based prototype.
Real-time household AC power monitoring with protection logic, safety sensing, and self-hosted Home Assistant integration.
PROJECT / 003
PUBLIC RECORD · REV / 01
01The challenge
Monitoring an AC appliance is only part of the problem. The system also needs to react to unsafe voltage or power conditions, observe temperature and gas signals, and make its state available beyond the enclosure.
02The approach
How the pieces connect
Voltage and current sensing feed an ESP32 that applies over-voltage and over-power protection logic through relay control. Temperature and gas sensors extend the safety layer, while an I²C display provides local feedback and ESP-NOW carries data toward a self-hosted Home Assistant setup.
This record uses verified project scope. Photographs, schematics, measurements, repository links, and test logs will be added only when authentic source material is ready.
03Build scope
Implemented capabilities
- Over-voltage and over-power protection
- Temperature and gas safety sensing
- Relay control
- I²C LCD feedback
04The result
The prototype brings measurement, protection, local feedback, wireless communication, and home-automation visibility together around real household AC loads.
05Technology
- 01ESP32
- 02ESP-NOW
- 03ACS712
- 04ZMPT101B
- 05Home Assistant
06Related work