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.

RaspberryPi-RFID

#!/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)

hee mattgorecki,
your code looks like something i've been looking for and its easy enough to understand.
Do you have any recommendations for a RFID reader?

Thanks in advance!
greetings Bram

what do you have program for import serial?

HI Brother,
i'm new on python i have PFE i want to controle the RFID and Insert the date , time for Entre and Exit And insert into SampleTable for calcule the duration where the employe stay in the atelier i just want how to controle this RFID Reader with raspberry Pi2 Card and inserting date,time when the employe put her carte for first one and insert date,time when he put her card for second one
this is my e-mail contact me and thank

Hi,
I am getting an error in the below line
ser = serial.Serial('/dev/ttyUSB0', BITRATE, timeout=0)
the error is "keyword can't be an expression"
What should I do?
Thanks in advance :)

Hi!!!
This is very nice and simple to understand..
I am making a project using RFID-RC522 on my raspberry, do you have spare time to walk me through it??
Thank you in advance!!!!

you have the complete code to this sir ? really need for our thesis ,

did you use 2x16 lcd screen for the display ?

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?

Very nice and simple.

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

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