Add bluetooth remote control via GPIO

bluetooth-audio/Dockerfile.aarch64 → bluetooth/Dockerfile.aarch64

@@ -14,6 +14,10 @@ RUN install_packages \
 # Copy sounds
 COPY sounds /usr/src/sounds
 
+# Copy bluetooth-control script
+COPY bluetooth-control /usr/src/
+RUN chmod +x /usr/src/bluetooth-control
+
 # Setup udev rules - this lets us play the connect/disconnect sound,
 # turn off discover/pairing when a client is connected
 # and also run a python script

bluetooth-audio/Dockerfile.template → bluetooth/Dockerfile.template

@@ -14,6 +14,10 @@ RUN install_packages \
 # Copy sounds
 COPY sounds /usr/src/sounds
 
+# Copy bluetooth-control script
+COPY bluetooth-control /usr/src/
+RUN chmod +x /usr/src/bluetooth-control
+
 # Setup udev rules - this lets us play the connect/disconnect sound,
 # turn off discover/pairing when a client is connected
 # and also run a python script

bluetooth/bluetooth-control

@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+
+# Set up variables
+VOLUME_UP_GPIO=$(</usr/src/volume_up_gpio)
+
+BLUETOOTH_GPIO=$(</usr/src/bluetooth_gpio)
+
+VOLUME_DOWN_GPIO=$(</usr/src/volume_down_gpio)
+
+NEXT_GPIO=$(</usr/src/next_gpio)
+
+PREVIOUS_GPIO=$(</usr/src/previous_gpio)
+
+OUTPUT_GPIO=$(</usr/src/output_gpio)
+
+TIMER="0"
+
+SKIP_STOP="0"
+
+BLUETOOTH_DISCOVERABLE="0"
+
+# Set up + volume
+if [[ ! -d /sys/class/gpio/gpio$VOLUME_UP_GPIO ]]; then
+  echo "$VOLUME_UP_GPIO" > /sys/class/gpio/export
+  sleep 1 
+fi
+echo "in" > /sys/class/gpio/gpio$VOLUME_UP_GPIO/direction
+
+# Set up bluetooth
+if [[ ! -d /sys/class/gpio/gpio$BLUETOOTH_GPIO ]]; then
+  echo "$BLUETOOTH_GPIO" > /sys/class/gpio/export
+  sleep 1 
+fi
+echo "in" > /sys/class/gpio/gpio$BLUETOOTH_GPIO/direction
+
+# Set up - volume
+if [[ ! -d /sys/class/gpio/gpio$VOLUME_DOWN_GPIO ]]; then
+  echo "$VOLUME_DOWN_GPIO" > /sys/class/gpio/export
+  sleep 1 
+fi
+echo "in" > /sys/class/gpio/gpio$VOLUME_DOWN_GPIO/direction
+
+# Set up next
+if [[ ! -d /sys/class/gpio/gpio$NEXT_GPIO ]]; then
+  echo "$NEXT_GPIO" > /sys/class/gpio/export
+  sleep 1 
+fi
+echo "in" > /sys/class/gpio/gpio$NEXT_GPIO/direction
+
+# Set up previous
+if [[ ! -d /sys/class/gpio/gpio$PREVIOUS_GPIO ]]; then
+  echo "$PREVIOUS_GPIO" > /sys/class/gpio/export
+  sleep 1 
+fi
+echo "in" > /sys/class/gpio/gpio$PREVIOUS_GPIO/direction
+
+# Set up utput gpio (there is one energy input missing)
+if [[ ! -d /sys/class/gpio/gpio$OUTPUT_GPIO ]]; then
+  echo "$OUTPUT_GPIO" > /sys/class/gpio/export
+  sleep 1 
+fi
+echo "out" > /sys/class/gpio/gpio$OUTPUT_GPIO/direction
+
+while : ; do
+
+while [[ "$(cat /sys/class/gpio/gpio$BLUETOOTH_GPIO/value)" == 1 ]]; do
+  if [[ "$TIMER" < 3 ]]; then
+    TIMER=$((TIMER+1))
+    sleep 1
+  fi
+done
+
+if [[ "$TIMER" == 3 ]]; then
+  if [[ ! -a /usr/src/is_discoverable ]]; then
+    printf "Making the device for 3 min discoverable. \n"
+    printf "discoverable on\npairable on\nexit\n" | bluetoothctl > /dev/null
+    touch /usr/src/is_discoverable
+    (sleep 180 ; printf "Closing bluetooth discovery. \n" ; printf "discoverable off\npairable off\nexit\n" | bluetoothctl > /dev/null ; rm /usr/src/is_discoverable) &
+  else
+    printf "The device is already discoverable. \n"
+  fi
+fi
+
+if [ -a /var/cache/bluetooth/reconnect_device ]; then
+
+# Get the alsa name of the connected device
+DEVICE="$(echo "$(amixer -D bluealsa scontrols)" | sed -n " s,[^']*'\([^']*\).*,\1,p ")"
+
+# Get and parse the MAC Adress of the connected device
+MAC="$(cat /var/cache/bluetooth/reconnect_device)"
+MAC_PARSED="$(echo ${MAC//:/_})"
+# PLAYER_ADDRESS="$(echo "$(dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED org.freedesktop.DBus.Properties.Get string:org.bluez.MediaControl1 string:Player)" | cut -d'"' -f 2)"
+
+if [[ ! -z "$(echo "$(amixer -D bluealsa scontrols)" | sed -n " s,[^']*'\([^']*\).*,\1,p ")" ]]; then
+
+# Volume up
+if [[ "$(cat /sys/class/gpio/gpio$VOLUME_UP_GPIO/value)" == 1 ]]; then
+  printf "Setting volume higher. \n"
+  amixer -D bluealsa sset "$DEVICE" 10%+
+  sleep 0.5
+fi
+
+if [[ "$TIMER" == 1 ]]; then
+  if [[ "$(dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED/player0 org.freedesktop.DBus.Properties.Get string:org.bluez.MediaPlayer1 string:Status | cut -d'"' -f 2)" == *"playing"* ]]; then 
+    printf "Stoping music playback. \n"
+    dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED/player0 org.bluez.MediaPlayer1.Pause
+  else
+    printf "Starting music playback. \n"
+    dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED/player0 org.bluez.MediaPlayer1.Play
+  fi
+fi
+
+if [[ "$TIMER" == 2 ]]; then
+  if [[ "$(dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED/player0 org.freedesktop.DBus.Properties.Get string:org.bluez.MediaPlayer1 string:Status | cut -d'"' -f 2)" == *"playing"* ]]; then
+    printf "Stoping music playback. \n"
+    dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED/player0 org.bluez.MediaPlayer1.Pause
+  else
+    printf "Starting music playback. \n"
+    dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED/player0 org.bluez.MediaPlayer1.Play
+  fi
+fi
+
+# Volume down
+if [[ "$(cat /sys/class/gpio/gpio$VOLUME_DOWN_GPIO/value)" == 1 ]]; then
+  printf "Setting volume lower. \n"
+  amixer -D bluealsa sset "$DEVICE" 10%-
+  sleep 0.5
+fi
+
+# Next track
+while [[ "$(cat /sys/class/gpio/gpio$NEXT_GPIO/value)" == 1 ]]; do
+  if [[ "$SKIP_STOP" == 0 ]]; then
+  printf "Playing the next track. \n"
+  dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED/player0 org.bluez.MediaPlayer1.Next
+  sleep 0.5
+  fi
+  SKIP_STOP="1"
+done
+
+SKIP_STOP="0"
+
+# Previous track
+while [[ "$(cat /sys/class/gpio/gpio$PREVIOUS_GPIO/value)" == 1 ]]; do
+  if [[ "$SKIP_STOP" == 0 ]]; then
+  printf "Playing the previous track. \n"
+  dbus-send --system --dest=org.bluez --print-reply /org/bluez/hci0/dev_$MAC_PARSED/player0 org.bluez.MediaPlayer1.Previous
+  sleep 0.5
+  fi
+  SKIP_STOP="1"
+done
+
+SKIP_STOP="0"
+
+fi
+
+TIMER="0"
+
+fi
+
+done

bluetooth-audio/bluetooth-scripts/bluetooth-connect → bluetooth/bluetooth-scripts/bluetooth-connect

@@ -1,13 +1,12 @@
 #!/usr/bin/python
-# This sript runs, when your pi connects to a bluetooth device and BLUETOOTH_CONNECT is set to anything.
+# This sript runs, when your pi connects to a bluetooth device and BLUETOOTH_SCRIPTS is set to true.
 # You can add your own code. BalenaSound has gpiozero installed so you can work with it.
 # Here is a example:
 
 # from gpiozero import LED
 # from time import sleep
 
-# led = LED(17)
+# led = LED(16)
 
 # led.off()
-# sleep(1)
-
+# sleep(1)

bluetooth-audio/bluetooth-scripts/bluetooth-disconnect → bluetooth/bluetooth-scripts/bluetooth-disconnect

@@ -1,12 +1,12 @@
 #!/usr/bin/python
-# This sript runs, when your pi disconnects from a bluetooth device and BLUETOOTH_DISCONNECT is set to anything.
+# This sript runs, when your pi disconnects from a bluetooth device and BLUETOOTH_SCRIPTS is set to true.
 # You can add your own code. BalenaSound has gpiozero installed so you can work with it.
 # Here is a example:
 
 # from gpiozero import LED
 # from time import sleep
 
-# led = LED(17)
+# led = LED(16)
 
 # led.off()
-# sleep(1)
+# sleep(1)

bluetooth-audio/bluetooth-udev → bluetooth/bluetooth-udev

@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/usr/bin/env bash
+
 export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket
 
 name=$(sed 's/\"//g' <<< $NAME)
@@ -26,12 +27,13 @@ add)
     fi
     ;;
 remove)
+    printf "discoverable off\npairable off\nexit\n" | bluetoothctl
+
     amixer -M sset PCM,0 $CONNECTION_NOTIFY_VOLUME% > /dev/null &
     amixer -M sset Digital,0 $CONNECTION_NOTIFY_VOLUME% > /dev/null &
 
     aplay -D hw:0,0 /usr/src/sounds/disconnect.wav > /dev/null 2>&1
 
-    printf "discoverable on\npairable on\nexit\n" | bluetoothctl
     amixer -M sset PCM,0 $SYSTEM_OUTPUT_VOLUME% > /dev/null &
     amixer -M sset Digital,0 $SYSTEM_OUTPUT_VOLUME% > /dev/null &
 	if [[ -z "$BLUETOOTH_SCRIPTS" ]]; then

bluetooth-audio/start.sh → bluetooth/start.sh

@@ -52,10 +52,12 @@ fi
 
 sleep 2
 rm -rf /var/run/bluealsa/
-/usr/bin/bluealsa -i hci0 -p a2dp-sink &
+/usr/bin/bluealsa -i hci0 -p a2dp-sink --a2dp-volume &
 
 hciconfig hci1 down > /dev/null 2>&1 # Disable onboard bluetooth if using a bluetooth dongle (onboard interface gets remapped to hci1) 
+
 hciconfig hci0 up
+
 hciconfig hci0 name "$DEVICE_NAME"
 
 if ! [ -z "$BLUETOOTH_PIN_CODE" ] && [[ $BLUETOOTH_PIN_CODE -gt 1 ]] && [[ $BLUETOOTH_PIN_CODE -lt 1000000 ]]; then
@@ -66,6 +68,10 @@ else
   printf "Starting bluetooth agent in Secure Simple Pairing Mode (SSPM) - No PIN code provided or invalid\n"
 fi
 
+if [[ ! -z "$DISABLE_AUTO_DISCOVERY" ]]; then
+  printf "discoverable off\npairable off\nexit\n" | bluetoothctl > /dev/null
+fi
+
 # Reconnect if there is a known device
 sleep 2
 if [ -f "/var/cache/bluetooth/reconnect_device" ]; then
@@ -74,7 +80,40 @@ if [ -f "/var/cache/bluetooth/reconnect_device" ]; then
   printf "connect %s\nexit\n" "$TRUSTED_MAC_ADDRESS" | bluetoothctl > /dev/null
 fi
 
+# Start gpio bluetooth control service
+if [[ -z "$DISABLE_BLUETOOTH_CONTROL" ]]; then
+  VOLUME_UP_GPIO="${VOLUME_UP_GPIO:-17}"
+  echo $VOLUME_UP_GPIO > /usr/src/volume_up_gpio
+  printf "Volume up button input is on GPIO$VOLUME_UP_GPIO \n"
+
+  BLUETOOTH_GPIO="${BLUETOOTH_GPIO:-27}"
+  echo $BLUETOOTH_GPIO > /usr/src/bluetooth_gpio
+  printf "Bluetooth button input is on GPIO$BLUETOOTH_GPIO \n"
+
+  VOLUME_DOWN_GPIO="${VOLUME_DOWN_GPIO:-22}"
+  echo $VOLUME_DOWN_GPIO > /usr/src/volume_down_gpio
+  printf "Volume down button input is on GPIO$VOLUME_DOWN_GPIO \n"
+
+  NEXT_GPIO="${NEXT_GPIO:-10}"
+  echo $NEXT_GPIO > /usr/src/next_gpio
+  printf "Next track button input is on GPIO$NEXT_GPIO \n"
+
+  PREVIOUS_GPIO="${PREVIOUS_GPIO:-9}"
+  echo $PREVIOUS_GPIO > /usr/src/previous_gpio
+  printf "Previous track button input is on GPIO$PREVIOUS_GPIO \n"
+
+  OUTPUT_GPIO="${OUTPUT_GPIO:-11}"
+  echo $OUTPUT_GPIO > /usr/src/output_gpio
+  printf "A extra energy output is on GPIO$OUTPUT_GPIO \n"
+
+  if [[ ! -z "CLOSE_DISCOVERY" ]]; then
+    touch /usr/src/close_discovery
+    printf "Bluetooth discovery will be deactivated if the device connects and bluetooth discovery got activated via gpio. \n"
+  fi
+
+  bash /usr/src/bluetooth-control &
+fi
+
 sleep 2
 printf "Device is discoverable as \"%s\"\n" "$DEVICE_NAME"
-exec /usr/bin/bluealsa-aplay --pcm-buffer-time=1000000 00:00:00:00:00:00
-
+exec /usr/bin/bluealsa-aplay --profile-a2dp 00:00:00:00:00:00

docker-compose.yml

@@ -1,7 +1,7 @@
 version: '2'
 services:
-  bluetooth-audio:
-    build: ./bluetooth-audio
+  bluetooth:
+    build: ./bluetooth
     restart: on-failure
     network_mode: host
     privileged: true

repo.yml

@@ -1 +1,4 @@
 type: balena
+upstream:
+  - repo: balena-sound
+    url: https://github.com/balenalabs/balena-sound