remember to do chmod +x shellscriptname.sh

Westman Islands, Iceland (Living in Reykjavik, Iceland)

I needed a “module” that wakes my mirror up when i started playing audio from it… here’s the python code and shell scripts needed…

import RPi.GPIO as GPIO
import time
import subprocess
isMonitorOn = False
isPlaying = False
sleepyTimer = 180                       #seconds until mirror goes to sleep
i = 0
counter = 0
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.IN)
print "Starting up!"
print isPlaying
while True:
       i=GPIO.input(4)
       print counter
       proc = subprocess.Popen('./isMonitorOn.sh', stdout=subprocess.PIPE)
       isMonitorOn = bool(proc.stdout.read())
       proc1 = subprocess.Popen('./isAudioOn.sh', stdout=subprocess.PIPE)
       isPlaying = bool(proc1.stdout.read())
       if i==0:
          counter += 1
          if not isMonitorOn:
            if isPlaying:
              subprocess.call("./wakeUp.sh")
              isMonitorOn = True
          if isMonitorOn:
            if isPlaying:
              counter = 0
            if counter >= sleepyTimer:
              subprocess.call("./sleep.sh")
              isMonitorOn = False
              counter = 0
          time.sleep(1)
       elif i==1:
          counter = 0
          if isMonitorOn:
            time.sleep(1)
          else:
            subprocess.call("./wakeUp.sh")
            time.sleep(1)

wakeUp.sh includes:

#!/bin/bash
/opt/vc/bin/tvservice --preferred && sudo chvt 6 && sudo chvt 7

sleep.sh includes:

#!/bin/bash
/opt/vc/bin/tvservice -o

isMonitorOn.sh includes

#!/bin/bash
isMonitorOn=$(/opt/vc/bin/tvservice --status | grep off | wc -l)
if [ "$isMonitorOn" = "0" ]; then
  echo True
fi

isAudioOn.sh includes

#!/bin/bash
if grep -q RUNNING /proc/asound/card*/pcm*/sub*/status; then echo "True"; fi

Python and Bash scripts need to be in the same folder!

for now i’m running this via screen

screen -dmS smartMotion python smartMotion.py

connect to screen session

screen -r smartMotion

detatch from session

CTRL + A + D

yeah i’m using it on a real mirror… looks great :)

awesome module! exactly what I needed…
running this with “screen -dmS spotify sudo ./spotify-connect-web -n Mirror -o plughw:CARD=ALSA,DEV=0” (just using the mini jack on the raspberry pi at the moment)