HiLetgo 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

I bought a PN532, expecting it to work right after soldering. I've seen videos of what this chip can do; it *should* have a tolerance of 5cm to read from, and should be able to read 14443 ISO tags as well as Mifare classics. And it does! At least, when you get the board to connect and STAY CONNECTED. After about four dozen attempts of rewiring, trying different wires and testing the board (and my Arduino) for issues, all I got was a brief connection to the PN532 before it sputtered out and died on me. I even attempted to resolder the board connectors (which turned out to be a bad idea), and ended up with what is now a defunct board, despite the board looking perfectly fine.EDIT: It turns out that the board was fine; rather, the Arduino I was working with had faulty data pins. Works just as advertised. Great board.

The media could not be loaded.  This review is for HiLetgo PN532 RFID Module.The package comes with 2 RFID cards (1 card and 1 key fob style) and the module itself. The module claims it can support 3 kinds (HSV, I2C and SPI) of connection. Most of the time, I would choose I2C as it has less wires to connect. But this is not the case here. The first reason was that in order to use I2C, you need to connect RST0 and IRQ pins (Based on the Adafruit library). Also, although the library can support both I2C and SPI, I could not find the initialize routine can pass in any I2C address. I might have missed something. Anyhow, given all these, I end up used SPI as my wiring between Arduino and the board which turns out working really well. Another good thing about SPI is that the library supports SW SPI, so I can choose whatever digital pins that I want. I used pin 2 to pin 5 as the example sketch suggested. For my testing, I used my Arduino UNO and open one of the example sketches provided by Adafruit. I had no problem reading the card. I am happy with the result. I would recommend this board for anyone who would like to learn more about 13.56Mhz type of RFID and how to use Arduino to control it.

The product shipped from Amazon is not V3 as shown in the picture.It is an older version that does not have the Reset pin break out (Required for Adafruit python I2C library).I followed the instructions but could not get it to work with the Adafruit Python library for the Raspberry Pi (either I2C or SPI).It may work with Arduino but you will have trouble with the Raspberry Pi Python library.[UPDATE]It must be some problem with my old Raspberry Pi board, but I swapped in a Raspberry Pi 3 board and installed Adafruit's adafruit-pn532-rfid-nfc circuitpython and everything is working now.Even the board I bought is not version 3 and does not have the reset pin, it still works.

I never got the UART & I2C to work. After spending 8 hours, I was only able to get it to work in SPI mode. Be careful if you need the other two modes.

wired it up to a raspberry pi and installed piimibo to make tags.