micropython-pn532-uart

UART based driver for the pn532. This driver is designed for use with micropython on the esp32.

Status

Just the most basic features are implemented. The primary one is the reading of passive rfid cards.

Usage

from pn532 import PN532Uart
import utime

DEBUG = False

try:
    rf = PN532Uart(2, tx=22, rx=23, debug=DEBUG)
    rf.SAM_configuration()
    ic, ver, rev, support = await rf.get_firmware_version()
    print('Found PN532 with firmware version: {0}.{1}'.format(ver, rev))
except Exception as e:
    rf = None
    print('No NFC reader (PN532) detected')

while rf is not None:
    try:
        uid = rf.read_passive_target()
        print("Card UUID: " + ''.join('{:02x}'.format(x) for x in uid))
    except Exception as e:
        print('timeout!')

References

The code is heavily based on the Adafruit PN532 NFC/RFID control library by Tony DiCola.

Fork update: Forked from https://github.com/infinite-tree/pn532-async, adapted to be synchronous and ready to be used without asyncio dependecy.