Car Bluetooth RasPi stuff

99-input.rules

# /etc/udev/rules.d/99-input.rules

SUBSYSTEM=="input", GROUP="input", MODE="0660"
KERNEL=="input[0-9]*", RUN+="/usr/lib/udev/bluetooth"

audio.conf

# Configuration file for the audio service
# /etc/bluetooth/audio.conf

# This section contains options which are not specific to any
# particular interface
[General]
Enable=Source,Sink,Media,Socket

# Switch to master role for incoming connections (defaults to true)
#Master=true

# If we want to disable support for specific services
# Defaults to supporting all implemented services
#Disable=Control,Source

# SCO routing. Either PCM or HCI (in which case audio is routed to/from ALSA)
# Defaults to HCI
#SCORouting=PCM

# Automatically connect both A2DP and HFP/HSP profiles for incoming
# connections. Some headsets that support both profiles will only connect the
# other one automatically so the default setting of true is usually a good
# idea.
AutoConnect=true

# Headset interface specific options (i.e. options which affect how the audio
# service interacts with remote headset devices)
[Headset]

# Set to true to support HFP, false means only HSP is supported
# Defaults to true
HFP=true

# Maximum number of connected HSP/HFP devices per adapter. Defaults to 1
MaxConnected=1

# Set to true to enable use of fast connectable mode (faster page scanning)
# for HFP when incomming call starts. Default settings are restored after
# call is answered or rejected. Page scan interval is much shorter and page
# scan type changed to interlaced. Such allows faster connection initiated
# by a headset.
FastConnectable=false

# Just an example of potential config options for the other interfaces
#[A2DP]
#SBCSources=1
#MPEG12Sources=0

auto-connect-bluetooth.sh

#!/bin/bash

pulseaudio --start
touch /home/pi/savedbtdevice

mac=""
paid=""
mac_=""
connected=0

macregex="\([0-9ABCDE]\{2\}:\)\{5\}[0-9ABCDE]\{2\}"

getmac() {
    mac=`grep -o -m 1 "$macregex" /home/pi/savedbtdevice`
    # use the first actively connected bt device if no saved mac
    # TODO: filter to the first audio device
    if [ -z "$mac" ]
    then
        mac=`hcitool con | grep SLAVE | grep -o -m 1 "$macregex"`
    fi
    mac_=${mac//:/_}
    echo "got mac: '$mac'"
}

testcon() {
    hcitool rssi $mac &>/dev/null
    ret=$?

    if [ $ret -ne 0 ]
    then
        connected=1
    else
        connected=0
    fi

    return $connected
}

mute() {
    pacmd "set-sink-mute 0 1"
}

unmute() {
    pacmd "set-sink-mute 0 0"
}

connect() {
    getmac

    if [ -z "$mac" ]
    then
        echo "no mac found"
        return -1
    fi

    if [ -n "$LASTPAID" ]
    then
        disconnect
    fi

    mute

    qpath=`qdbus --system org.bluez | grep "/dev_" | grep -m 1 "$mac_"`

    qdbus --system org.bluez $qpath org.bluez.AudioSource.Disconnect > /dev/null 2> /dev/null
    sleep 5
    qdbus --system org.bluez $qpath org.bluez.AudioSource.Connect # > /dev/null
    ret=$?
    echo $ret

    source=`pactl list | grep -m 1 "Name: bluez_source" | cut -c 8-`
    sink=`pactl list | grep -m 1 "Name: alsa_output" | cut -c 8-`
    paid=`pactl load-module module-loopback source=$source sink=$sink`

    if testcon && [ -n "$paid" ]
    then
        echo "connected successfully to $mac"
        echo "pulseaudio connected: [$paid] $source -> $sink"
        unmute
    else
        echo "connection error"
        exit -1
    fi

    export LASTPAID=paid
}

disconnect() {
    mute

    getmac

    paid=$paid
    if [ -z "$paid" ]
    then
        paid=$LASTPAID
    fi

    if [ -n "$paid" ]
    then
        pactl unload-module $paid
    fi

    qpath=`qdbus --system org.bluez | grep "/dev_" | grep -m 1 "$mac_"`
    qdbus --system org.bluez $qpath org.bluez.AudioSource.Disconnect

    testcon
}


# MAIN

getmac

if [ -n "$2" ]
then
    echo "$2" > /home/pi/savedbtdevice
fi

case "$1" in
    connect-notimeout)
        disconnect
        while :
        do
            if testcon
            then
                exit 0
            else
                connect
            fi
            sleep 1
        done
    ;;
    connect)
        connect
    ;;
    disconnect)
        disconnect
    ;;
    *)
        echo "Usage: $0 {connect|disconnect} [mac]"
        exit -1
    ;;
esac

exit 0

bluetooth

#!/bin/bash
# /usr/lib/udev/bluetooth

AUDIOSINK="alsa_output.platform-bcm2835_AUD0.0.analog-stereo"

echo "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
    sudo hciconfig hci0 noscan

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

    mac=`hcitool con | grep SLAVE | grep -o -m 1 "\([0-9ABCDE]\{2\}:\)\{5\}[0-9ABCDE]\{2\}"`

    if [ -n "$mac" ]
    then
        echo "$mac connected" >> /home/pi/bt.log
        touch /home/pi/savedbtdevice
        echo $mac > /home/pi/savedbtdevice

        su pi -c "/home/pi/auto-connect-bt.sh connect"
    fi

    # 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 audio 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
    # reenable bluetooth discovery
    service bluetooth-agent start
fi

bluetooth-agent

### BEGIN INIT INFO
# Provides: bluetooth-agent
# Required-Start: $remote_fs $syslog bluetooth pulseaudio
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Makes Bluetooth discoverable and connectable to 0000
# Description: Start Bluetooth-Agent at boot time.
### END INIT INFO
#! /bin/sh
# /etc/init.d/bluetooth-agent
USER=root
HOME=/root
BTPIN=0000
export USER HOME BTPIN
case "$1" in
	start)
        # turn on bluetooth and make discoverable
		sudo hciconfig hci0 piscan
		start-stop-daemon -S -x /usr/bin/bluetooth-agent -c pi -b -- 0000
		echo "Bluetooth discoverable with the password 0000."

        su pi -c "/home/pi/auto-connect-bt.sh connect-notimeout"
	;;
	stop)
		echo "Stopping bluetooth agent."
		start-stop-daemon -K -x /usr/bin/bluetooth-agent
	;;
	restart)
		service bluetooth-agent stop
		service bluetooth-agent start
    	;;
	*)
		echo "Usage: /etc/init.d/bluetooth-agent {start|stop}"
		exit 1
	;;
esac
exit 0

main.conf

# /etc/bluetooth/main.conf

[General]

# List of plugins that should not be loaded on bluetoothd startup
#DisablePlugins = network,input

# Default adaper name
# %h - substituted for hostname
# %d - substituted for adapter id
Name = Sitkum 

# Default device class. Only the major and minor device class bits are
# considered.
Class = 0x200420

# How long to stay in discoverable mode before going back to non-discoverable
# The value is in seconds. Default is 180, i.e. 3 minutes.
# 0 = disable timer, i.e. stay discoverable forever
DiscoverableTimeout = 0

# How long to stay in pairable mode before going back to non-discoverable
# The value is in seconds. Default is 0.
# 0 = disable timer, i.e. stay pairable forever
PairableTimeout = 0

# Use some other page timeout than the controller default one
# which is 16384 (10 seconds).
PageTimeout = 8192

# Discover scheduler interval used in Adapter.DiscoverDevices
# The value is in seconds. Defaults is 30.
DiscoverSchedulerInterval = 30

# Automatic connection for bonded devices driven by platform/user events.
# If a platform plugin uses this mechanism, automatic connections will be
# enabled during the interval defined below. Initially, this feature
# intends to be used to establish connections to ATT channels.
AutoConnectTimeout = 60

# What value should be assumed for the adapter Powered property when
# SetProperty(Powered, ...) hasn't been called yet. Defaults to true
InitiallyPowered = true

# Remember the previously stored Powered state when initializing adapters
RememberPowered = true

# Use vendor, product and version information for DID profile support.
# The values are separated by ":" and VID, PID and version.
#DeviceID = 1234:5678:abcd

# Do reverse service discovery for previously unknown devices that connect to
# us. This option is really only needed for qualification since the BITE tester
# doesn't like us doing reverse SDP for some test cases (though there could in
# theory be other useful purposes for this too). Defaults to true.
ReverseServiceDiscovery = true

# Enable name resolving after inquiry. Set it to 'false' if you don't need
# remote devices name and want shorter discovery cycle. Defaults to 'true'.
NameResolving = true

# Enable runtime persistency of debug link keys. Default is false which
# makes debug link keys valid only for the duration of the connection
# that they were created for.
DebugKeys = false

# Enable the GATT Attribute Server. Default is false, because it is only
# useful for testing.
AttributeServer = false

DisablePlugins = pnat

rfcomm.conf

# RFCOMM configuration file.
# /cat/bluetooth/rfcomm.conf

rfcomm0 {
	# Automatically bind the device at startup
	bind no;

	# Bluetooth address of the device
	device E4:98:D6:55:2E:27;

	# RFCOMM channel for the connection
	channel	10;

	# Description of the connection
	comment "Dungeness";
}