udev-bluetooth.sh

#!/bin/bash
#change if you don't use default analog audio out.
#THIS DIDN'T WORK FOR MY PI SO I ADDED A amixer COMMAND BELOW
AUDIOSINK="alsa_output.platform-bcm2835_AUD0.0.analog-stereo"
echo "Executing bluetooth script...|$ACTION|" >> /var/log/bluetooth_dev

ACTION=$(expr "$ACTION" : "\([a-zA-Z]\+\).*")
if [ "$ACTION" = "add" ]
then

# Turn off BT discover mode before connecting existing BT device to audio
hciconfig hci0 noscan

# set the audio output to the analog
# COMMENT THIS LINE OUT IF YOU WANT TO OUTPUT AUDIO THROUGH HDMI
amixer cset numid=3 1

# Set volume level to 100 percent
amixer set Master 100%
pacmd set-sink-volume 0 65537

   for dev in $(find /sys/devices/virtual/input/ -name input*)
   do
      if [ -f "$dev/name" ]
      then
         mac=$(cat "$dev/name" | sed 's/:/_/g')
         bluez_dev=bluez_source.$mac

         sleep 1

         CONFIRM=`sudo -u pi pactl list short | grep $bluez_dev`
         if [ ! -z "$CONFIRM" ]
         then
            echo "Setting bluez_source to:  $bluez_dev" >> /var/log/bluetooth_dev
            echo pactl load-module module-loopback source=$bluez_dev sink=$AUDIOSINK rate=44100 adjust_time=0 >> /var/log/bluetooth_dev
            sudo -u pi pactl load-module module-loopback source=$bluez_dev sink=$AUDIOSINK rate=44100 adjust_time=0 >> /var/log/bluetooth_dev
         fi
      fi
   done
fi

if [ "$ACTION" = "remove" ]
then
# Turn on bluetooth discovery if device disconnects
sudo hciconfig hci0 piscan
fi