🔍 Product Overview

The MFRC522 RFID Reader Module is a compact, cost-effective interface board designed for 13.56 MHz contactless card reading and writing. It supports ISO/IEC 14443A cards/tags (such as MIFARE 1K/4K) and features SPI (and optional I²C/ UART) communication for seamless integration with development boards like Arduino, ESP32 or Raspberry Pi.

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🚀 Why It’s Ideal for Your Projects

• Easy proximity sensing — Just place a compatible RFID card or tag near the antenna and the module reads the unique ID (UID) and can even write to blocks of the card memory.

• Microcontroller-friendly interface — With SPI communication and logic compatible with popular boards, you can start using it in minutes for access control, attendance systems, key-fob identification and more.

• Low-cost and highly integrated — Combines the RF front-end, controller and antenna into one module, making it a smart choice for DIY, educational and embedded applications.

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📝 Key Features

• Operating frequency: 13.56 MHz, suitable for ISO/IEC 14443A/MIFARE tags

• Communication interface: SPI (primary), with modules often supporting I²C or UART variants

• Supply voltage: 3.3 V (logic level) — many boards allow 5 V input if regulated correctly

• Typical read/write distance: up to ≈ 4–6 cm (varies with tag size, orientation and antenna tuning)

• Includes breakout pins for power, SPI signals (MOSI, MISO, SCK, SS) and reset

• Onboard antenna coil and LED indicator to show when tags are detected

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🎯 Typical Applications

• Access control systems – Build digital door locks, attendance clocks or secured entry systems using RFID key-cards or key-fobs.

• Inventory or asset tracking – Tag items and detect their movement or presence via the reader module.

• Interactive projects & makers – Use this module in robotics, vending machines or interactive kiosks to detect user cards.

• Educational electronics – Ideal for teaching RFID communication protocols, SPI interfacing and microcontroller-based systems.

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✅ Why You’ll Love It

The MFRC522 RFID Reader Module offers a powerful and straightforward way to implement proximity card detection or tag reading in your projects. Its compact design, standard communication interface and broad compatibility make it a favorite among hobbyists, students and professional developers alike. With a few wires and lines of code, you can add card-based access, identification or automation functionality to your system.