NFC Wallet Project

This project implements NFC (Near Field Communication) functionality using Arduino-compatible boards with PN532 NFC modules. It includes libraries for NDEF (NFC Data Exchange Format) message handling and PN532 communication protocols.

Features

• NDEF message creation, reading, and writing
• Support for MIFARE Classic and Ultralight tags
• Peer-to-peer (P2P) communication
• Tag emulation
• Multiple communication interfaces (HSU, I2C, SPI)

Hardware Requirements

• Arduino-compatible board (e.g., Arduino Uno, ESP32)
• PN532 NFC module
• NFC tags/cards for testing

Software Requirements

• PlatformIO IDE or VS Code with PlatformIO extension
• Arduino framework

Installation

1. Clone or download this repository
2. Open the project in PlatformIO
3. Build and upload the desired example sketch

Usage

Examples

The lib/NDEF/examples/ and lib/PN532/examples/ directories contain various example sketches:

• ReadTag.ino: Read NDEF messages from NFC tags
• WriteTag.ino: Write NDEF messages to NFC tags
• P2P_Send.ino / P2P_Receive.ino: Peer-to-peer communication
• emulate_tag_ndef.ino: Tag emulation

Library Usage

Include the necessary headers in your Arduino sketch:

#include <NfcAdapter.h>
#include <NdefMessage.h>

Initialize the NFC adapter and perform operations as shown in the examples.

Main Application

The main application in src/main.cpp provides NFC card cloning, reading, and emulation functionality for ESP32.

1. Connect the PN532 module to the ESP32:

   • TX -> GPIO 16 (RX2)
   • RX -> GPIO 17 (TX2)
   • Set DIP switches to OFF - OFF for HSU mode

2. Open the project in PlatformIO and build/upload the sketch.

3. Open the serial monitor (115200 baud) to interact with the device.

4. The application supports:

   • Reading MIFARE Classic cards
   • Cloning card data
   • Emulating tags with NDEF messages
   • Peer-to-peer communication via SNEP

Follow the serial prompts to perform operations.

Project Structure

• src/: Main source code
• lib/NDEF/: NDEF library for message handling
• lib/PN532/: PN532 driver library
• include/: Additional includes
• test/: Test sketches

Contributing

Contributions are welcome. Please submit issues and pull requests on the project repository.

License

This project uses libraries with their respective licenses. Check individual library READMEs for details.