Hardware
Counter board
A small, battery-powered board built around a low-power STM32U microcontroller. It wakes up only when the press closes and sleeps the rest of the time.
- Contactless detection with Hall and reed sensors and a mating magnet
- Wake-up on press close detection
- LCD for reading the count on site
- Tamper protection
- LoRa radio
- Sealed, high-temperature enclosure