A custom RFID reader based on the ST Microelectronics ST25R3920B module.

Provides NFC and RFID reader support via an SPI interface. It is used by Museum in a Box in the v2.0 hardware redesign, replacing the RC522 reader that was used in earlier generations. To ease migration from that, and any other, setups using the RC522 board it uses the same mounting hole pattern and 8-pin 0.1” header for the electronic interface. The pin-out isn’t identical, but the key power, ground and SPI interface pins are carried across in the same locations.