100 lines
3.5 KiB
Python
100 lines
3.5 KiB
Python
# Example of detecting and reading a block from a MiFare classic NFC card.
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# Author: Tony DiCola & Roberto Laricchia
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# MiFare Classic modification: Francesco Crisafulli
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#
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# Copyright (c) 2015 Adafruit Industries
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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"""
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This example shows connecting to the PN532 and writing & reading a mifare classic
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type RFID tag
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"""
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import board
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import busio
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# Additional import needed for I2C/SPI
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#from digitalio import DigitalInOut
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#
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# NOTE: pick the import that matches the interface being used
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#
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from adafruit_pn532.adafruit_pn532 import MIFARE_CMD_AUTH_B
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from adafruit_pn532.i2c import PN532_I2C
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#from adafruit_pn532.spi import PN532_SPI
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#from adafruit_pn532.uart import PN532_UART
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# I2C connection:
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i2c = busio.I2C(board.SCL, board.SDA)
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# Non-hardware reset/request with I2C
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pn532 = PN532_I2C(i2c, debug=False)
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# With I2C, we recommend connecting RSTPD_N (reset) to a digital pin for manual
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# harware reset
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#reset_pin = DigitalInOut(board.D6)
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# On Raspberry Pi, you must also connect a pin to P32 "H_Request" for hardware
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# wakeup! this means we don't need to do the I2C clock-stretch thing
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#req_pin = DigitalInOut(board.D12)
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#pn532 = PN532_I2C(i2c, debug=False, reset=reset_pin, req=req_pin)
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# SPI connection:
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#spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
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#cs_pin = DigitalInOut(board.D5)
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#pn532 = PN532_SPI(spi, cs_pin, debug=False)
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# UART connection
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#uart = busio.UART(board.TX, board.RX, baudrate=115200, timeout=100)
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#pn532 = PN532_UART(uart, debug=False)
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ic, ver, rev, support = pn532.firmware_version
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print('Found PN532 with firmware version: {0}.{1}'.format(ver, rev))
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# Configure PN532 to communicate with MiFare cards
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pn532.SAM_configuration()
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print('Waiting for RFID/NFC card to write to!')
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key = b'\xFF\xFF\xFF\xFF\xFF\xFF'
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while True:
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# Check if a card is available to read
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uid = pn532.read_passive_target(timeout=0.5)
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print('.', end="")
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# Try again if no card is available.
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if uid is not None:
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break
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print("")
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print('Found card with UID:', [hex(i) for i in uid])
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print("Authenticating block 4 ...")
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authenticated = pn532.mifare_classic_authenticate_block(uid, 4, MIFARE_CMD_AUTH_B, key)
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if not authenticated:
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print("Authentication failed!")
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# Set 16 bytes of block to 0xFEEDBEEF
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data = bytearray(16)
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data[0:16] = b'\xFE\xED\xBE\xEF\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
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# Write 16 byte block.
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pn532.mifare_classic_write_block(4, data)
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# Read block #6
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print('Wrote to block 4, now trying to read that data:',
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[hex(x) for x in pn532.mifare_classic_read_block(4)])
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