Arduino library for SPI and I2C access to the PN532 RFID/Near Field Communication chip
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ladyada Merge pull request #62 from ivoh95/master
Fixed bug in the spi SS line
Latest commit d5ad324 Jan 17, 2019



MCU Tested Works Doesn't Work Not Tested Notes
Atmega328 @ 16MHz X SPI & I2C Works
Atmega328 @ 12MHz X SPI & I2C Works
Atmega32u4 @ 16MHz X Follow instructions at to move pin 2.
Atmega32u4 @ 8MHz X SPI & I2C Works
ESP8266 X SPI only, I2C clock stretching not supported
ESP32 X SPI works; I2C works using IRQ and without sharing the I2C bus.
Atmega2560 @ 16MHz X SPI & I2C Works
ATSAM21D X SPI only, I2C clock stretching not supported. Use programming port.
ATtiny85 @ 16MHz X
ATtiny85 @ 8MHz X
Intel Curie @ 32MHz X
  • ATmega328 @ 16MHz : Arduino UNO, Adafruit Pro Trinket 5V, Adafruit Metro 328, Adafruit Metro Mini
  • ATmega328 @ 12MHz : Adafruit Pro Trinket 3V
  • ATmega32u4 @ 16MHz : Arduino Leonardo, Arduino Micro, Arduino Yun, Teensy 2.0
  • ATmega32u4 @ 8MHz : Adafruit Flora, Bluefruit Micro
  • ESP8266 : Adafruit Huzzah
  • ESP32 : WROOM
  • ATmega2560 @ 16MHz : Arduino Mega
  • ATSAM3X8E : Arduino Due
  • ATSAM21D : Arduino Zero, M0 Pro
  • ATtiny85 @ 16MHz : Adafruit Trinket 5V
  • ATtiny85 @ 8MHz : Adafruit Gemma, Arduino Gemma, Adafruit Trinket 3V