RC522 SEN13 RFID Card Reader Sensor Module

Key Features:

• Chip: NXP MFRC522.
• Frequency: 13.56 MHz.
• Protocol: Supports ISO 14443A.
• Supported Cards: Mifare 1 S50, S70, Ultralight, Pro, DESFire.
• Interface: SPI (Serial Peripheral Interface).
• Voltage: 3.3V.
• Applications: Access control, personal identification, inventory tracking, simple payment systems.

How it Works:

1. Communication: The module uses radio waves to communicate with compatible RFID tags.
2. Data Transfer: It reads data (like Unique IDs or UIDs) from tags when brought close, often using SPI to send data to a microcontroller (like Arduino or ESP32).
3. Microcontroller Integration: Libraries (like Miguel Balboa’s for Arduino) simplify reading UIDs and performing read/write operations.

Common Uses:

• Security: Creating simple keycard entry systems.
• Attendance: Tracking who enters a room.
• Projects: Hobbyist projects for simple identification or data logging.

In essence, it’s a versatile, low-cost module for adding contactless identification to DIY electronics projects, available from suppliers like Amazon.in and other electronics retailers.