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Table of Contents
RFID RC522
This is a very inexpensive RFID module with an MFRC522 integrated circuit and a PCB antenna.
Although the MFRC522 has I2C, serial and SPI interfaces, only SPI is available on the this module.
Pinout
+-------------------------------------+ | ANTENNA | | | | XTAL NXPRC522 | | | + *SDA SCK MOSI MISO IRQ GND RST 3V3 + *SDA is the SPI NSS input.
RPi
| Pin | ALT | RFID RC522 | |
|---|---|---|---|
| GPIO8 | CE0 | SDA | |
| GPIO11 | SCLK | SCK | |
| GPIO10 | MOSI | MOSI | |
| GPIO9 | MISO | MISO | |
| IRQ | |||
| GND | GND | ||
| GPIO25 | RST | ||
| 3V3 | 3V3 |
