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@michaelfdeberry
Last active May 19, 2024 10:41
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Python 3 relay toggle for Moode Audio
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
#!/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)
[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
@wigw
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wigw commented Jan 28, 2023

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

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