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I have a program that turns my pi on and off at a push of a button. The program works and i know that it runs on boot because it prints text and I can see it in the terminal. But what happens is when i press the button, nothing happens. I have tried 2 different ways of auto running the program.

my code

import RPi.GPIO as GPIO
import time
import os


GPIO.setmode(GPIO.BCM)
GPIO.setup(3, GPIO.IN, pull_up_down = GPIO.PUD_UP)

def shutdown(channel):
    os.system("sudo shutdown -h now")

    GPIO.add_event_detect(3, GPIO.FALLING, callback = shutdown, bouncetime = 2000)

and i have tried to auto run it by putting "python powerbutton.py" at the bottom of the file /etc/rc.local and .bashrc

Ghanima
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Brycen Williams
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    How have you tried to auto run it? What does the code look like? Where is it printing text to? Is the process still running after boot? – Jacobm001 Aug 12 '16 at 21:04
  • Hey all, please keep in mind how comments are to be used... – Ghanima Aug 12 '16 at 21:12
  • i have added my code and how i auto ran it – Brycen Williams Aug 12 '16 at 21:15
  • .bashrc is not the place to put the command. When you put it at the bottom of rc.local did you put it ABOVE any lines that say exit 0 - also, when using rc.local you wont need sudo in your script - rc.local is executed as root – Jaromanda X Aug 12 '16 at 21:49
  • I'm sure someone else will be kind enough to point out the error in your code. Of course there may well be errors in your wiring as well. As to the code error I suggest a Python tutorial is the best start point. – joan Aug 13 '16 at 08:32
  • I'm assuming this is python3 Try putting the line: #!/usr/env python3 at the very top of your script. Also, show us what you put into the rc.local file. – j0h Jan 18 '17 at 17:38

1 Answers1

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Your question is incomplete, but from the look of your (apparently) incomplete program it is not running.

For a working solution see https://raspberrypi.stackexchange.com/a/42945/8697

This would also be more robust, and less prone to unwanted shutdown due to spikes.

Community
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Milliways
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