rpico-rc522 is a CircuitPython library that manages the RC522 reader (chip MFRC522) on the Raspberry Pico microcontroller.
It is a porting of rpi-rc522. Please see there for detailed documentation and usage examples.
The library offers two handy objects:
- RC522: low level class that manages the RC522.
- RC522Manager: high level class to easily read/write data from/to the NFC tag.
There is also a collection of utils functions.
The library is works with CircuitPython.
To install CircuitPython on the Pico:
- Download it here
- Push the BOOTSEL button on the Pico while connecting the usb to the computer.
- Drag and drop the downloaded file directly into the Pico, that is seen as a USB storage.
To install the library, simply copy the rpico_rc522 folder in the lib directory of the Pico.
Default wiring between the Pico and the rc522.
| Name | Pin # | Pin name |
|---|---|---|
| SDA | 2 | GP1 |
| SCK | 4 | GP2 |
| MOSI | 5 | GP3 |
| MISO | 6 | GP4 |
| IRQ | None | None |
| GND | Ground | Ground |
| RST | 1 | GP0 |
| 3.3V | 36 | 3V3 |
You can use this image for the Raspberry Pico pinout.
The wiring configuration can be changed via software.
Michele Rizzo, Master's Degree Computer Engineering student at University of Brescia.