Adding a Shutdown Button to the Raspberry Pi 2

1. Writing a Python Script
#!/bin/python
# Simple script for shutting down the raspberry Pi at the press of a button.
# by Inderpreet Singh

import RPi.GPIO as GPIO
import time
import os

# Use the Broadcom SOC Pin numbers
# Setup the Pin with Internal pullups enabled and PIN in reading mode.
GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.IN, pull_up_down = GPIO.PUD_UP)

# Our function on what to do when the button is pressed
def Shutdown(channel):
    os.system("sudo shutdown -h now")

# Add our function to execute when the button pressed event happens
GPIO.add_event_detect(18, GPIO.FALLING, callback = Shutdown, bouncetime = 2000)

# Now wait!
while 1:
    time.sleep(1)
2. Test it
sudo python shutdown_pi.py
3. Adding it to startup
sudo nano /etc/rc.local
sudo python /home/pi/Scripts/shutdown_pi.py &

Source

Filed Under :

AndrewRoot

7:07 AM

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