Gowoops PN532 NFC NXP RFID Module V3 Kit Near Field Communication Reader Module Kit I2C SPI HSU with S50 White Card Key Card for Arduino Raspberry Pi DIY Smart Phone Android Phone

finding a wiring diagram for this was a bit of a pain, so if you're hooking it up to an arduino Uno R3, the easiest way to use it would be in I2C mode (onboard jumper pins set to 1,0). In I2C mode use the 4 pins on this board (GND, VCC, SDA, SCL) and connect them to GND, +5v, A4, and A5 (respectively) on the arduino. Include PN532_I2C.h, PN532.h, and NfcAdapter.h to your sketch and you're off to the races.

followed instructions for SPI / Raspberry Pi. works as expected so far. Tested with LG G4My only real gripe is that the read distance is extremely SHORT. Less than one centimeter.Note: use the rate specified in the instructions, faster rates don't seem to work

The media could not be loaded.  This kit is amazing. I had an example put together within minutes of receiving this. I'm going to order another one and use it in a project to make my home door unlock with a swipe of the RF keychain. Search google for the pn532 library and open the example code to start using this device right away. I would recommend this to anyone who wants to add NFC capabilities to their Arduino or simlilar boards.