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Card detected
Card read UID: 136,4,150,165
Size: 4
AUTH ERROR!!
AUTH ERROR(status2reg & 0x08) != 0
Authentication error

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MFRC522-python/Read.py
65ebda1  on 20 Mar
@mxgxw mxgxw Merge branch 'master' into master
@mxgxw @mj3052 @wybczu @BiTinerary
     
82 lines (64 sloc)  2.5 KB
#!/usr/bin/env python
# -*- coding: utf8 -*-
#
#    Copyright 2014,2018 Mario Gomez <mario.gomez@teubi.co>
#
#    This file is part of MFRC522-Python
#    MFRC522-Python is a simple Python implementation for
#    the MFRC522 NFC Card Reader for the Raspberry Pi.
#
#    MFRC522-Python is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Lesser General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    MFRC522-Python is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Lesser General Public License for more details.
#
#    You should have received a copy of the GNU Lesser General Public License
#    along with MFRC522-Python.  If not, see <http://www.gnu.org/licenses/>.
#

import RPi.GPIO as GPIO
import MFRC522
import signal

continue_reading = True

# Capture SIGINT for cleanup when the script is aborted
def end_read(signal,frame):
    global continue_reading
    print "Ctrl+C captured, ending read."
    continue_reading = False
    GPIO.cleanup()

# Hook the SIGINT
signal.signal(signal.SIGINT, end_read)

# Create an object of the class MFRC522
MIFAREReader = MFRC522.MFRC522()

# Welcome message
print "Welcome to the MFRC522 data read example"
print "Press Ctrl-C to stop."

# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:
    
    # Scan for cards    
    (status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)

    # If a card is found
    if status == MIFAREReader.MI_OK:
        print "Card detected"
    
    # Get the UID of the card
    (status,uid) = MIFAREReader.MFRC522_Anticoll()

    # If we have the UID, continue
    if status == MIFAREReader.MI_OK:

        # Print UID
        print "Card read UID: %s,%s,%s,%s" % (uid[0], uid[1], uid[2], uid[3])
    
        # This is the default key for authentication
        key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
        
        # Select the scanned tag
        MIFAREReader.MFRC522_SelectTag(uid)

        # Authenticate
        status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)

        # Check if authenticated
        if status == MIFAREReader.MI_OK:
            MIFAREReader.MFRC522_Read(8)
            MIFAREReader.MFRC522_StopCrypto1()
        else:
            print "Authentication error"

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import RPi.GPIO as gpio
import MFRC522

def read_card(reader, key):
    # Scan for cards    
    (status, tag_type) = reader.MFRC522_Request(reader.PICC_REQIDL)

    # If a card is found
    if status != reader.MI_OK:
        return None
    print "Card detected"
            
    # Get the UID of the card
    (status, uid) = reader.MFRC522_Anticoll()

    # If we have the UID, continue
    if status != reader.MI_OK:
        return None

    # Print UID
    print "Card read UID: %s,%s,%s,%s" % (uid[0], uid[1], uid[2], uid[3])
    # Select the scanned tag
    reader.MFRC522_SelectTag(uid)

    # Authenticate
    status = reader.MFRC522_Auth(reader.PICC_AUTHENT1A, 8, key, uid)

    # Check if authenticated
    if status != reader.MI_OK:
        print "Authentication error"
        return None
    data = reader.MFRC522_Read(8)
    reader.MFRC522_StopCrypto1()
    return data

def main():
    try:
        reader = MFRC522.MFRC522()

        # Welcome message
        print "Welcome to the MFRC522 data read example"
        print "Press Ctrl-C to stop."

        # This is the default key for authentication
        key = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]
        # This loop keeps checking for chips. If one is near it will get the UID and authenticate
        while True:
            data = read_card(reader, key) 
            if data is not None:
                print data           
    except KeyboardInterrupt:
        print "Ctrl+C captured, ending read."
    finally:
        gpio.cleanup()

if __name__ == '__main__':
    main()