screen control

gistfile1.txt

#!/usr/bin/env python

import RPi.GPIO as GPIO         # Import RPi GPIO Lib
import time
import os

def button_callback(channel):
    print("Button was pushed!")
    time.sleep(0.2)
    
GPIO.setwarnings(False)         # Ignore warnings for now
GPIO.setmode(GPIO.BOARD)        # Use physical pin numbering

# Set pin 10 to be an input pin & set initial value to be pulled low (off)
GPIO.setup(10, GPIO.IN, pull_up_down=GPIO.PUD_UP) 
# GPIO.add_event_detect(10,GPIO.FALLING,callback=button_callback) # Setup event on pin 10 rising edge

# message = input("Press enter to quit\n\n") # Run until someone presses enter
# GPIO.cleanup() # Clean up

state=0

while True:
    input_state=GPIO.input(10)
    if (state == 0 and input_state == False):
       print('screen off')
       os.system("echo 1 > /sys/class/backlight/rpi_backlight/bl_power")
       time.sleep(0.5)
       state=1

    elif (state == 1 and input_state == False):
       print('screen on')
       os.system("echo 0 > /sys/class/backlight/rpi_backlight/bl_power")
       time.sleep(0.5)
       state=0