87 lines
2.5 KiB
Python
87 lines
2.5 KiB
Python
# SPDX-FileCopyrightText: <text> 2015 Tony DiCola, Roberto Laricchia,
|
|
# and Francesco Crisafulli, for Adafruit Industries </text>
|
|
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
# Example of detecting and reading a block from a MiFare classic NFC card.
|
|
|
|
"""
|
|
This example shows connecting to the PN532 and writing & reading a mifare classic
|
|
type RFID tag
|
|
"""
|
|
|
|
import board
|
|
import busio
|
|
|
|
# Additional import needed for I2C/SPI
|
|
# from digitalio import DigitalInOut
|
|
#
|
|
# NOTE: pick the import that matches the interface being used
|
|
#
|
|
from adafruit_pn532.adafruit_pn532 import MIFARE_CMD_AUTH_B
|
|
from adafruit_pn532.i2c import PN532_I2C
|
|
|
|
# from adafruit_pn532.spi import PN532_SPI
|
|
# from adafruit_pn532.uart import PN532_UART
|
|
|
|
# I2C connection:
|
|
i2c = busio.I2C(board.SCL, board.SDA)
|
|
|
|
# Non-hardware reset/request with I2C
|
|
pn532 = PN532_I2C(i2c, debug=False)
|
|
|
|
# With I2C, we recommend connecting RSTPD_N (reset) to a digital pin for manual
|
|
# harware reset
|
|
# reset_pin = DigitalInOut(board.D6)
|
|
# On Raspberry Pi, you must also connect a pin to P32 "H_Request" for hardware
|
|
# wakeup! this means we don't need to do the I2C clock-stretch thing
|
|
# req_pin = DigitalInOut(board.D12)
|
|
# pn532 = PN532_I2C(i2c, debug=False, reset=reset_pin, req=req_pin)
|
|
|
|
# SPI connection:
|
|
# spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
|
|
# cs_pin = DigitalInOut(board.D5)
|
|
# pn532 = PN532_SPI(spi, cs_pin, debug=False)
|
|
|
|
# UART connection
|
|
# uart = busio.UART(board.TX, board.RX, baudrate=115200, timeout=0.1)
|
|
# pn532 = PN532_UART(uart, debug=False)
|
|
|
|
ic, ver, rev, support = pn532.firmware_version
|
|
print("Found PN532 with firmware version: {0}.{1}".format(ver, rev))
|
|
|
|
# Configure PN532 to communicate with MiFare cards
|
|
pn532.SAM_configuration()
|
|
|
|
print("Waiting for RFID/NFC card to write to!")
|
|
|
|
key = b"\xFF\xFF\xFF\xFF\xFF\xFF"
|
|
|
|
while True:
|
|
# Check if a card is available to read
|
|
uid = pn532.read_passive_target(timeout=0.5)
|
|
print(".", end="")
|
|
# Try again if no card is available.
|
|
if uid is not None:
|
|
break
|
|
|
|
print("")
|
|
|
|
print("Found card with UID:", [hex(i) for i in uid])
|
|
print("Authenticating block 4 ...")
|
|
|
|
authenticated = pn532.mifare_classic_authenticate_block(uid, 4, MIFARE_CMD_AUTH_B, key)
|
|
if not authenticated:
|
|
print("Authentication failed!")
|
|
|
|
# Set 16 bytes of block to 0xFEEDBEEF
|
|
data = bytearray(16)
|
|
data[0:16] = b"\xFE\xED\xBE\xEF\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
|
|
|
|
# Write 16 byte block.
|
|
pn532.mifare_classic_write_block(4, data)
|
|
# Read block #6
|
|
print(
|
|
"Wrote to block 4, now trying to read that data:",
|
|
[hex(x) for x in pn532.mifare_classic_read_block(4)],
|
|
)
|