#!/usr/bin/python
fobj = open("/root/status.txt","r+")
import RPi.GPIO as GPIO
import time
import sys
import subprocess
import os
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.OUT)
status=fobj.read()
while True:
    rc522 = subprocess.Popen(["/root/bcm2835-1.35/rpi-rc522-read-only/rc522/rc522_reader","-d"], stdout=subprocess.PIPE)
    ID=rc522.stdout.readline()
    fobj.truncate()
    fobj.write(ID)
fobj.close()