The new PN532 library uses SPI HW implementation from official arduino SPI.h library The original PN532 library from seeedstudio uses a dedicated SPI SW implementation in PN532.h library The benefit ...

Per usare il PN532 in modalita I2C dovete: Settare i due switch della board per la modalità I2C. Collegare SDA e SCL ai rispettivi pin della board Arduino. Impostare il define "USE_SPI" dello sketch ...

I am guessing that you have an Arduino Uno board handy. Even though most of the available libraries (for PN532) are focused primarily on Arduino Mega, I still prefer the Uno, as it’s more comfortable ...