README.md

PN532 NFC HAT

This is a PN532 NFC library for Raspberry Pi.

Features

• Support I2C, SPI and HSU of PN532
• Easy to understand how the PN532 chip works

How to use

1. Plug the PN532 NFC Hat to your Pi.
2. The module supports I2C, SPI and HSU.

• on I2C: Set I0: H and I1: L, which means

  MOSI/SDA/TX Pin to Pi's SDA
  NSS/SCL/RX Pin to Pi's SCL
  

• on SPI: Set I0: L and I1: H, which means

  MOSI/SDA/TX Pin to Pi's MOSI
  NSS/SCL/RX Pin to Pi's CE0
  

• on HSU(UART): Set I0: L and I1: L, which means

  MOSI/SDA/TX Pin to Pi's RX
  NSS/SCL/RX Pin to Pi's TX
  

3. Modify the init lines and Run the example with python3 example.py.

   • for SPI, uncomment this line: pn532 = PN532_SPI(debug=False, reset=20, cs=4), and comment lines for I2C and UART.
   • for I2C, uncomment this line: pn532 = PN532_I2C(debug=False, reset=20, req=16), and comment lines for SPI and UART.
   • for UART, uncomment this line: pn532 = PN532_UART(debug=False, reset=20), and comment lines for SPI, I2C.

4. With waving a 13.56MHz NFC card, the UID of the card will be printed.