95 lines
2.6 KiB
Python
95 lines
2.6 KiB
Python
|
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()
|
||
|
|
|
||
|
|
# 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: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(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)
|
||
|
|
print "\n"
|
||
|
|
|
||
|
|
# Check if authenticated
|
||
|
|
if status == MIFAREReader.MI_OK:
|
||
|
|
|
||
|
|
# Variable for the data to write
|
||
|
|
data = []
|
||
|
|
|
||
|
|
# Fill the data with 0xFF
|
||
|
|
for x in range(0,16):
|
||
|
|
data.append(0xFF)
|
||
|
|
|
||
|
|
print "Sector 8 looked like this:"
|
||
|
|
# Read block 8
|
||
|
|
MIFAREReader.MFRC522_Read(8)
|
||
|
|
print "\n"
|
||
|
|
|
||
|
|
print "Sector 8 will now be filled with 0xFF:"
|
||
|
|
# Write the data
|
||
|
|
MIFAREReader.MFRC522_Write(8, data)
|
||
|
|
print "\n"
|
||
|
|
|
||
|
|
print "It now looks like this:"
|
||
|
|
# Check to see if it was written
|
||
|
|
MIFAREReader.MFRC522_Read(8)
|
||
|
|
print "\n"
|
||
|
|
|
||
|
|
data = []
|
||
|
|
# Fill the data with 0x00
|
||
|
|
for x in range(0,16):
|
||
|
|
data.append(0x00)
|
||
|
|
|
||
|
|
print "Now we fill it with 0x00:"
|
||
|
|
MIFAREReader.MFRC522_Write(8, data)
|
||
|
|
print "\n"
|
||
|
|
|
||
|
|
print "It is now empty:"
|
||
|
|
# Check to see if it was written
|
||
|
|
MIFAREReader.MFRC522_Read(8)
|
||
|
|
print "\n"
|
||
|
|
|
||
|
|
# Stop
|
||
|
|
MIFAREReader.MFRC522_StopCrypto1()
|
||
|
|
|
||
|
|
# Make sure to stop reading for cards
|
||
|
|
continue_reading = False
|
||
|
|
else:
|
||
|
|
print "Authentication error"
|