MFRC522 RFID RC522 13.56MHz Contactless Smart Card Reader Module

MFRC522 RFID RC522 – 13.56MHz Contactless Smart Card Reader Module

The MFRC522 RFID Module is a highly integrated contactless card reader/writer operating at 13.56MHz. Based on the NXP MFRC522 IC, it communicates via SPI (and optionally I2C/UART) and is compatible with MIFARE Classic, MIFARE Ultralight, and other ISO/IEC 14443A compliant cards and tags.

Key Specifications

• IC: NXP MFRC522
• Operating Frequency: 13.56 MHz
• Interface: SPI (up to 10 Mbps), I2C, UART
• Operating Voltage: 3.3V DC
• Read Range: Up to 5cm (card dependent)
• Supported Cards: MIFARE Classic 1K/4K, MIFARE Ultralight, NTAG
• Connector: 8-pin 2.54mm header
• Includes: RFID card + key fob tag

Compatibility & Use Cases

The MFRC522 module is fully compatible with Arduino, ESP32, NodeMCU, and Raspberry Pi via SPI. Use the MFRC522 Arduino library for quick integration. Common applications include:

• Door access control and electronic lock systems
• Attendance tracking and student ID systems
• Inventory and asset management with RFID tags
• IoT-connected smart locker and safe systems
• STEM and engineering project demonstrations

Comes with one RFID card and one key fob for immediate testing. Note: operates at 3.3V — use a logic level shifter when interfacing with 5V Arduino boards.

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