Added shutdown function

adafruit / Adafruit-PN532

Arduino library for SPI and I2C access to the PN532 RFID/Near Field Communication chip

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Open georgecoffey opened 3 years ago

georgecoffey commented 3 years ago

I have added the shutdown function that was available in one of the previous Adafruit PN532 libraries so that it can be used again.

I have only tested this on the SPI bus, not the I2C

I tested this with a multimiter and confirmed the power drop