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@mattgorecki
Created July 26, 2013 01:34
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Python script to read RFID card from serial RFID reader attached to a Raspberry Pi. Also has a Exit button. The card swipe releases the maglock on the door.
#!/usr/bin/python2
import serial
import re, sys, signal, os, time, datetime
import RPi.GPIO as GPIO
BITRATE = 9600
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.OUT)
GPIO.setup(3, GPIO.IN, pull_up_down=GPIO.PUD_UP)
# Lock the door on boot
GPIO.output(7, GPIO.HIGH)
pidfile = daemon.pidfile.PIDLockFile("/var/run/bearclaw.pid")
CARDS = [
'060090840715',
'840034BD3E33',
'6A003E3A2C42',
'840034D5DDB8',
'6A003E6F556E',
'840034CD324F',
'6A003E61AC99',
'6A003E247E0E',
'6A003E77BD9E',
'840034D6CEA8'
]
def signal_handler(signal, frame):
print "Closing Bearclaw"
GPIO.output(7, GPIO.LOW) # Unlock the door on program exit
GPIO.cleanup()
ser.close()
sys.exit(0)
def unlock_door(duration):
print "Unlocking door for %d seconds" % duration
GPIO.output(7, GPIO.LOW)
time.sleep(duration)
print "Locking the door"
GPIO.output(7, GPIO.HIGH)
if __name__ == '__main__':
buffer = ''
ser = serial.Serial('/dev/ttyUSB0', BITRATE, timeout=0)
rfidPattern = re.compile(b'[\W_]+')
signal.signal(signal.SIGINT, signal_handler)
while True:
# Read data from RFID reader
buffer = buffer + ser.read(ser.inWaiting())
if '\n' in buffer:
lines = buffer.split('\n')
last_received = lines[-2]
match = rfidPattern.sub('', last_received)
if match:
print match
if match in CARDS:
print 'card authorized'
unlock_door(10)
else:
print 'unauthorized card'
# Clear buffer
buffer = ''
lines = ''
# Listen for Exit Button input
if not GPIO.input(3):
print "button pressed"
unlock_door(5)
time.sleep(0.1)
@smartclassroomwce
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pidfile = daemon.pidfile.PIDLockFile("/var/run/bearclaw.pid")

i m using this code in my project but i got error at the above line so what can i do?

@ChucksArm
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Very nice and simple.

@alexjpanagis
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I wasn't able to get this to work with Mifare's RFID reader - would you be willing to help me out?

@lasuridze
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i have not config with serial i have pin SCA,SDL PA12, P11

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