GPIO control sample code for Raspberry Pi

gpio_led_brink_sample.py

#!/usr/bin/python
#
# GPIO control sample code for Raspberry Pi
#
# setup
#   $ sudo apt-get update
#   $ sudo apt-get install python-rpi.gpio
#
# see also...
#   http://elinux.org/RPi_Low-level_peripherals
#   http://code.google.com/p/raspberry-gpio-python/wiki/Main
#   http://code.google.com/p/raspberry-gpio-python/wiki/Examples
#
import sys
import signal
from time import sleep
import RPi.GPIO as GPIO

pin = 13  # GPIO27

GPIO.setwarnings(False)

def sigint_handler(signo, frame):
    GPIO.output(pin, False)
    GPIO.cleanup()
    sys.exit(0)

signal.signal(signal.SIGINT, sigint_handler)

# setup
GPIO.setmode(GPIO.BOARD)
GPIO.setup(pin, GPIO.OUT)

while True:
    # blink LED
    GPIO.output(pin, True)
    sleep(0.5)
    GPIO.output(pin, False)
    sleep(0.5)