Instruction Guide Use hardware momentary switches to control moOde

Code:
#!/usr/bin/python

#coding: utf8

#script for moode audio GPIO buttons

#on playlist names no spaces



#import

import RPi.GPIO as GPIO

import sys

import time

import datetime

import os

import subprocess



# Set GPIO mode

GPIO.setmode(GPIO.BCM)



# Define the GPIO pins to be used

SW_PREV = 10

SW_NEXT = 11

SW_POWEROFF = 9

SW_PLAY = 12

SW_VOLUP = 20

SW_VOLDOWN = 26 

SW_PL1 = 16

SW_PL2 = 13

# Adjust to the button characteristics if necessary

PRELL = 1000



# Code to manage buttons

GPIO.setup(SW_PREV,GPIO.IN, pull_up_down=GPIO.PUD_UP)

GPIO.setup(SW_NEXT,GPIO.IN, pull_up_down=GPIO.PUD_UP)

GPIO.setup(SW_POWEROFF,GPIO.IN, pull_up_down=GPIO.PUD_UP)

GPIO.setup(SW_PLAY,GPIO.IN, pull_up_down=GPIO.PUD_UP)

GPIO.setup(SW_VOLUP,GPIO.IN, pull_up_down=GPIO.PUD_UP)

GPIO.setup(SW_VOLDOWN,GPIO.IN, pull_up_down=GPIO.PUD_UP)

GPIO.setup(SW_PL1,GPIO.IN, pull_up_down=GPIO.PUD_UP)

GPIO.setup(SW_PL2,GPIO.IN, pull_up_down=GPIO.PUD_UP)



# Event procedures

def eSW_PREV(channel):

       subprocess.call(['mpc', 'prev' ])

       print str(datetime.datetime.now())[:19] + " previous"



def eSW_NEXT(channel):

       subprocess.call(['mpc', 'next' ])

       print str(datetime.datetime.now())[:19] + " next"



def eSW_POWEROFF(channel):

       subprocess.call(['mpc', 'stop' ])

       subprocess.call(['sudo', 'poweroff' ])

       print str(datetime.datetime.now())[:19] + " shutting down"



def eSW_PLAY(channel):

       subprocess.call(['mpc', 'toggle' ])

       print str(datetime.datetime.now())[:19] + " play"



def eSW_VOLUP(channel):

       subprocess.call(['/var/www/vol.sh', 'up 1' ])

       print str(datetime.datetime.now())[:19] + " volup"



def eSW_VOLDOWN(channel):

       subprocess.call(['/var/www/vol.sh', 'dn 1' ])

       print str(datetime.datetime.now())[:19] + " voldown"



def eSW_PL1(channel):

       subprocess.call(['mpc', 'load playlist1' ])

       print str(datetime.datetime.now())[:19] + " playlist 1"



def eSW_PL2(channel):

       subprocess.call(['mpc', 'load playlist2' ])

       print str(datetime.datetime.now())[:19] + " playlist 2"

       

# Event declarations

GPIO.add_event_detect(SW_PREV, GPIO.RISING, callback = eSW_PREV, bouncetime = PRELL)

GPIO.add_event_detect(SW_NEXT, GPIO.RISING, callback = eSW_NEXT, bouncetime = PRELL)

GPIO.add_event_detect(SW_POWEROFF, GPIO.RISING, callback = eSW_POWEROFF, bouncetime = PRELL)

GPIO.add_event_detect(SW_PLAY, GPIO.RISING, callback = eSW_PLAY, bouncetime = PRELL)

GPIO.add_event_detect(SW_VOLUP, GPIO.RISING, callback = eSW_VOLUP, bouncetime = PRELL)

GPIO.add_event_detect(SW_VOLDOWN, GPIO.RISING, callback = eSW_VOLDOWN, bouncetime = PRELL)

GPIO.add_event_detect(SW_PL1, GPIO.RISING, callback = eSW_PL1, bouncetime = PRELL)

GPIO.add_event_detect(SW_PL2, GPIO.RISING, callback = eSW_PL2, bouncetime = PRELL)



# Actual program sequence

while True:

   time.sleep(1)