RC522 13.56MHz RFID Sensor Module with Reader Card

Overview

The RC522 13.56MHz RFID Sensor Module with Reader Card is a compact, cost-effective RFID reader/writer based on the popular RC522 chip. Designed for fast contactless communication at 13.56 MHz, this module is perfect for hobbyists and professionals integrating RFID into access control, attendance systems, smart home devices, and automation projects.

Key Advantages

• High compatibility: Works with ISO14443A/MIFARE tags including MIFARE 1K and 4K.
• Easy integration: SPI interface supports up to 10 Mbps for quick communication with microcontrollers.
• Read/write support: Read ID, write data blocks and manage card memory for secure applications.
• Compact and low power: Small footprint and 3.3V operation make it ideal for embedded and battery-powered solutions.
• Integrated antenna: Onboard antenna ensures stable tag detection within its operating distance.

Specifications

• Chip: RC522
• Operating frequency: 13.56 MHz
• Interface: SPI (up to 10 Mbps)
• Power supply: 3.3V DC
• Operating distance: Up to 5 cm (varies by tag and environment)
• Supported cards: MIFARE 1K, MIFARE 4K, ISO14443A compatible tags
• Package: Module, 13.56 MHz RFID card, 13.56 MHz key fob

Applications

• Access control systems and secure door entry
• Attendance tracking for schools and workplaces
• Smart home automation and device authentication
• Inventory tagging and short-range identification
• Prototyping and educational electronics projects

Integration and Wiring

The RC522 module uses SPI pins for communication. Typical connections to a 3.3V microcontroller are:

• VCC to 3.3V
• GND to ground
• MOSI to MCU MOSI
• MISO to MCU MISO
• SCK to MCU SCK
• SDA (SS) to MCU chip select (assignable)
• RST to MCU reset or GPIO

Do not connect the module to 5V directly. Use a 3.3V supply or a level shifter when interfacing with 5V logic.

Software and Example Use

There are many open source libraries and examples for Arduino and Raspberry Pi that support the RC522. Example features you can implement:

• Read UID and display on serial monitor
• Authenticate and read/write MIFARE blocks
• Use multiple tags to trigger actions in automation projects
• Implement simple access lists and attendance logging

Tips for Best Performance

• Keep tags within 5 cm of the module for reliable reads.
• Avoid metal surfaces near the antenna to prevent interference.
• Use quality MIFARE cards/fobs for consistent results.
• Ensure stable 3.3V power to avoid communication errors.

Package Contents

• 1 x RC522 RFID Sensor Module (13.56MHz)
• 1 x 13.56 MHz RFID Card
• 1 x 13.56 MHz RFID Key Fob

Note: Product images are for illustration only. Actual product may vary slightly in appearance.

Get Started

The RC522 13.56MHz RFID Sensor Module is an affordable, flexible solution to add short-range RFID read/write capability to your next project. Whether you are building an access control system, attendance logger, or interactive installation, this module provides a simple way to integrate MIFARE and ISO14443A tag support with common microcontrollers.