RC522 RFID Module - 13.56MHz

RC522 RFID Module

The RC522 RFID Module is a low-cost, highly integrated wireless communication module used for reading and writing RFID tags operating at 13.56 MHz. It is based on the MFRC522 chip and supports contactless communication using the ISO/IEC 14443 Type A standard. The module communicates with microcontrollers through the SPI interface, making it easy to integrate with platforms such as Arduino, ESP32, NodeMCU, and Raspberry Pi. It is widely used in access control systems, attendance tracking, security authentication, and smart card applications.

• Operating Voltage: 3.3V
• Operating Current: 13-26 mA
• Operating Frequency: 13.56 MHz
• Communication Interface: SPI protocol, also supports I2C and UART
• Read Range: 2-5 cm (depends on the antenna design)
• Data Transfer Rate: Maximum 10 Mbit/s
• Supported RFID Cards: ISO/IEC 14443 Type A/MIFARE

Pin Configuration

1. VCC: 3.3V power supply
2. RST: Reset pin
3. GND: Ground
4. MISO/SCL/TX: SPI MISO, I2C SCL, UART TX
5. MOSI: SPI MOSI
6. SCK: SPI clock
7. SS/SDA/RX: SPI slave select, I2C SDA, UART RX
8. IRQ: Interrupt pin (optional, used for advanced functions)