import RPi.GPIO as GPIO
from time import sleep
import argparse

CHANNEL = 19
GPIO.setmode(GPIO.BCM)


def debug():
    standby_for = 30
    while standby_for:
        if GPIO.input(CHANNEL):
            print('Input was HIGH')
        else:
            print('Input was LOW')
        sleep(1)
        standby_for -= 1

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--debug', action='store_true',
                        help='Enables the DEBG opcode')
    args = parser.parse_args()

    GPIO.setup(CHANNEL, GPIO.IN)

    if args.debug:
        debug()
    GPIO.cleanup()

if __name__ == '__main__':
    main()