ESP32-RC522-RFID-reader-writer

Purpose

The ESP32-RC522-RFID-reader-writer is a project designed to interface an ESP32 microcontroller with the RC522 RFID module. It enables the detection, reading, and writing of NFC tags that comply with the ISO/IEC 14443A standard. This module is ideal for applications that require NFC or RFID capabilities such as access control, asset management, inventory systems, and more.

Features

• Configurability: The project is designed with configurable pins and can be configured to keep performing a certain task.
• UART input handling: The project takes input through UART at 115200 baudrate, and accepts the entered string after the 0x0D (\n) character then extracts data through String handling.
• Detection: The module can detect RFID tags within range and retrieve information like UID (Unique Identifier).
• Reading: The ability to read data from RFID tags, displaying the tag's contents.
• Writing: It can write data to compatible RFID tags, such as MIFARE Classic cards.

Applications

This module can be used in various applications, including but not limited to:

• Access Control Systems: Grant or deny access based on RFID tag data.
• Asset Management: Keep track of items using RFID tags.
• Inventory Management: Use RFID tags to automate the process of tracking stock and inventory.
• Payment Systems: Integrate with payment systems that use RFID tags or cards.

Requirements

To use the ESP32-RC522-RFID-reader-writer, you will need the following:

• Hardware:

  • ESP32 microcontroller board
  • RC522 RFID module
  • RFID tags/cards (e.g., MIFARE Classic, ISO/IEC 14443A standard)
  • Jumper wires and a breadboard for connections

• Software:

  • Arduino IDE with ESP32 support
  • RC522 library for Arduino (available from the library manager)

Installation

1. Install the ESP32 board in the Arduino IDE.
2. Install the RC522 library via the Arduino Library Manager.
3. Connect the ESP32 to the RC522 module following the pinout.
4. Upload the provided code to the ESP32.

Usage

1. Power on the system with the ESP32 and RC522 module connected.
2. Open the Serial Monitor in Arduino IDE.
3. You can choose different modes (e.g., detect, read, write) from the interactive menu in the Serial Monitor.

Warnings and Safety Precautions

• Avoid Short Circuits: Ensure all connections are correctly made to avoid damaging the components.
• Use Proper Voltage: The ESP32 and RC522 module typically operate at 3.3V. Do not apply higher voltages to avoid damage.
• RFID Tag Compatibility: The system is designed for MIFARE Classic tags or tags that comply with the ISO/IEC 14443A standard, other RFID tags may not be supported.
• Avoid Physical Damage: Handle the ESP32 and RC522 module with care, especially the RFID module’s antenna.

Disclaimer

This module is intended for educational and non-commercial use. Any modification or use of this module in critical applications (e.g., security systems) should be done with caution and proper validation.

License

This project is open-source and released under the MIT License. Feel free to modify and use it in your own projects.

Contributions

Contributions are welcome! Please feel free to open issues or submit pull requests to improve the functionality or add new features to this module.

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Happy coding!