Read.py

#!/usr/bin/env python
# -*- coding: utf8 -*-

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:
    for sector in range(15):
        for key in MFRC522.MIFARE_CLASSIC_1K_KEYS:
            # Scan for cards
            (status, TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)

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

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

                # Select the scanned tag
                MIFAREReader.MFRC522_SelectTag(uid)

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

                # Check if authenticated
                if status == MIFAREReader.MI_OK:
                    data = MIFAREReader.MFRC522_Read(sector)
                    # Print sector data
                    print data
                    MIFAREReader.MFRC522_StopCrypto1()