diff --git a/examples/pn532_readwrite_mifare.py b/examples/pn532_readwrite_mifare.py
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+# Example of detecting and reading a block from a MiFare classic NFC card.
+# Author: Tony DiCola & Roberto Laricchia
+# MiFare Classic modification: Francesco Crisafulli
+#
+# Copyright (c) 2015 Adafruit Industries
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""
+This example shows connecting to the PN532 and writing & reading a mifare classic
+type RFID tag
+"""
+
+import board
+import busio
+#
+# 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=100)
+#pn532 = PN532_UART(uart, debug=False)
+
+ic, ver, rev, support = pn532.get_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)])