The RC522 RFID Reader/Writer Module is the most popular choice for adding secure, contactless identification to your projects. At Electrapac, we recommend this kit for hobbyists building smart door locks, attendance systems, or inventory trackers using Arduino, Raspberry Pi, or ESP32.

Product Overview

The RC522 module uses a highly integrated MFRC522 chip to communicate with RFID tags and cards at a frequency of 13.56MHz. It allows you to read unique IDs from tags and even write data to the memory of "Mifare" compatible cards. Because it uses the SPI protocol, it is incredibly fast and compatible with almost all modern microcontrollers.

Key Features for Electrapac Customers

• Complete Kit: Every module from www.electrapac.com comes with an RFID Key Fob and a S50 White Card, allowing you to start testing your security system immediately.

• Write Capability: Unlike simple "read-only" scanners, the RC522 can write small amounts of data (like a user's name or a balance amount) directly onto the card’s internal memory sectors.

• Contactless Convenience: Uses electromagnetic fields to identify and track tags attached to objects. No physical contact or "line of sight" is required.

• Compact & Low Power: Its small footprint makes it easy to hide behind plastic panels or inside 3D-printed enclosures for a professional-looking finish.

• Massive Library Support: Works perfectly with the MFRC522.h library, making it easy to find sample code for "Access Granted" or "Access Denied" logic.

  Primary Applications

  • Electronic Door Locks: Open a solenoid or servo motor only when a registered tag is scanned.

  • Attendance Systems: Log the entry and exit times of students or employees to an SD card or a web server.

  • Inventory Management: Track items in a small warehouse by attaching RFID stickers to products.

  • Interactive Games: Use RFID tags as "keys" or "artifacts" in an Escape Room or RPG game.

  • Secure Login: Use your RFID key fob to unlock your PC or a password-protected toolbox.

  Why Shop at Electrapac?

  We source our RC522 Modules with high-quality PCB antennas to ensure the best possible read range and reliable data transmission. At www.electrapac.com, we provide the security components that let you protect what matters most.