Python 3 relay toggle for Moode Audio

Instructions

Change the relay pin to the GPIO pin for your relay.
Save the contents of relaytoggle.py script to /home/pi/relaytoggle.py
Save the contents of relaytoggle.service script to /lib/systemd/system/relaytoggle.service
Run the following commands
    sudo systemctl enable relaytoggle
    sudo service relaytoggle start

relaytoggle.py

#!/usr/bin/env python3

import RPi.GPIO as GPIO
import os
import time

defaultDelay = 5 #seconds 
relayPin = 2 # GPIO pin in BCM
currentState = False # the current state

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(relayPin, GPIO.OUT)

def isRunning():
    return "RUNNING" in os.popen('cat /proc/asound/card*/pcm*/sub*/status | grep RUNNING').read().split()

while True:
    if isRunning() and not currentState:         
        GPIO.output(relayPin, 1)
        currentState = True
        print("Relay Activated")
        time.sleep(defaultDelay)
        
    elif not isRunning() and currentState:   
        # delay again on playback stops to account for track changes
        time.sleep(defaultDelay)
                
        if isRunning():
            # if it's running don't deactivate the realay   
            print("Playback resumed, cancelling deactivation")
            continue
        else:
            # deactivate the relay
            GPIO.output(relayPin, 0)
            currentState = False
            print("Relay Deactivated")                                     
            
        time.sleep(defaultDelay)
    else:
        print("No State Change...")
        time.sleep(defaultDelay)        

relaytoggle.service

[Unit]
Description=MoOde Relay Toggle Daemon

[Service]
Restart=on-failure
WorkingDirectory=/home/pi
ExecStart=python relaytoggle.py
ExecReload=/bin/kill -HUP $MAINPID
KillSignal=SIGINT

[Install]
WantedBy=multi-user.target

Hello. I tried your script, I did everything step by step, I got nothing. Maybe I did not copy the text of the script correctly (indents, tab) or there are no necessary app. Please help.

I have not used Moode in a while, it could be that the script is no longer compatible.

However, an easy way to tell if the issue is formatting is you can try to run the script. You can run the command ‘python relaytoggle.py’ from the directory where the file is saved. Fix any errors it reports.

The other thing I can think of off hand is to make sure you are using the BCM PIN number, and not the board PIN number.

Hi. Thank you so much. Everything worked out. The problem is in the formatting of the document. See the screenshot.