A collection of programmes and libraries for Arduinos that implement various electronic IDs and ATM/UTM interfaces.
Developed using a basic ESP32 dev module (https://www.banggood.com/Geekcreit-ESP32-WiFi+bluetooth-Development-Board-Ultra-Low-Power-Consumption-Dual-Cores-Pins-Unsoldered-p-1214159.html).
My nRF52840 Bluetooth 5 remote ID has its own repository.