This is a library for the Adafruit PN532 NFC/RFID breakout boards This library works with the Adafruit NFC breakout and shield ----> https://www.adafruit.com/products/364 ----> https://www.adafruit.com/products/789 Check out the links above for our tutorials and wiring diagrams These chips use SPI or I2C to communicate Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Written by Limor Fried/Ladyada & Kevin Townsend for Adafruit Industries. BSD license, check license.txt for more information All text above must be included in any redistribution To download. click the DOWNLOADS button in the top right corner, rename the uncompressed folder Adafruit_NFCShield_I2C. Check that the Adafruit_NFCShield_I2C folder contains Adafruit_NFCShield_I2C.cpp and Adafruit_NFCShield_I2C.h Place the Adafruit_NFCShield_I2C library folder your <arduinosketchfolder>/libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE.