A low-power, magnetically mounted energy monitoring device. Currently in development.
Hardware
- ESP32-C3 Supermini + ATtiny1616
- Phototransistor for LED pulse detection
- 450mAh battery (target ~6 months life)
- TP4056 USB charging
- Magnetic alignment mounting system
Design
- 35mm circular PCB
- CNC aluminium / resin mounting bracket
Functionality
- Counts watt-hour LED pulses
- Periodic ESP wake + data transmission (ESP-NOW)
- Integration with Home Assistant / web dashboard