A C++ class based on pigpio library for Raspberry Pi to use RC522 RFID reader.
Pigpio library
Connecting RC522 module to SPI is pretty easy. You can use this neat website for reference.
| Board pin name | Board pin | Physical RPi pin | RPi pin name |
|---|---|---|---|
| SDA | 1 | 24 | GPIO8, CE0 |
| SCK | 2 | 23 | GPIO11, SCKL |
| MOSI | 3 | 19 | GPIO10, MOSI |
| MISO | 4 | 21 | GPIO9, MISO |
| GND | 6 | 6, 9, 20, 25 | Ground |
| RST | 7 | 22 | GPIO25 |
| 3.3V | 8 | 1 | 3V3 |
Another pin can be configured instead of GPIO25
- Detect the presence of a new card
- Read the serial number of a card