import RPi.GPIO as GPIO,time,os
DEBUG = 1
GPIO.setmode(GPIO.BCM)
def RCtime(RCpin):
    reading = 0
    GPIO.setup(RCpin,GPIO.OUT)
    GPIO.output(RCpin,GPIO.LOW)
    time.sleep(0.1)
    GPIO.setup(RCpin,GPIO.IN)
    while(GPIO.input(RCpin) == GPIO.LOW):
        reading+=1
    return reading
while True:
    print RCtime(4)
    
    
