About this product
The RC522 module is a 13.56 MHz RFID reader and writer based on the NXP MFRC522 IC, supporting ISO/IEC 14443 A, MIFARE, and NTAG transponders. An SPI interface and a 3.3 V supply connect it to Arduino, ESP32, or Raspberry Pi hosts for access-control and attendance projects. It does not read 125 kHz proximity tags.