HeadlessBT

a headless bluetooth audio and gpio manager for RPI

UPDATE

on newer versions of raspbian (raspbian desktop) a screen reader prompt will play continiously

kill the process with sudo -eaf | grep wiz and kill the process with name piwiz, kill <pid>

then remove the file with sudo rm /etc/xdg/autostart/piwiz.desktop

Setup

turn on RaspberryPi and run through main setup

Right click on the top menu bar and click Add / Remove Panel Items then scroll down to bluetooth and select remove

next setup audio streaming

Audio Setup

sudo apt-get update

sudo apt-get install bluez pulseaudio-module-bluetooth python-gobject python-gobject-2

then add user "pi" to the default group

sudo usermod -a -G lp pi

next enter

sudo nano /etc/bluetooth/audio.conf

and add Enable=Source,Sink,Media,Socket to the file then enter

sudo nano /etc/pulse/daemon.conf

and add resample-method = trivial Finally Reboot, sudo reboot

Change the bluetooth adapter name by entering:

bluetoothctl
system-alias <Alias Here>
exit

check to see if the bluetooth is working buy running

sudo hciconfig hci0 piscan

the device with the alias should appear under your bluetooth section

if the the device does not show up on an iphone go to a text to hex converter and convert the name you want to show up into hex

for example: Car System is 4361722053797374656d

the max character limit for the hex is 22

if the hex does not reach 22 you need to pad the end with 0's

4361722053797374656d has only 20 characters so you make it 4361722053797374656d00

then enter sudo /bin/hciconfig hci0 inqdata "0c09[hex here]020a00091002006b1d460217050d03001801180e110c1115110b1100" and add your hex code where it says hex here (remove the parenthesis)

this should make it discoverable

Steps adapted from this guide

ensure audio stream works then procees to download the flask app.

navigate to the home directory and run the command

git clone https://www.github.com/explosion33/headlessBT flask

If you changed the install location, modify the config file and update the root

run sudo python3 /home/pi/flask/main.py and ensure everything works properly. Proceed to WAN setup

WAN Setup

Run sudo apt install dnsmasq hostapd

then

sudo systemctl stop dnsmasq
sudo systemctl stop hostapd

open sudo nano /etc/dhcpcd.conf

at the bottom enter

interface wlan0
    static ip_address=192.168.4.1/24
    nohook wpa_supplicant

save and then type

sudo mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig

open sudo nano /etc/dnsmasq.conf

then type

interface=wlan0      # Use the require wireless interface - usually wlan0
dhcp-range=192.168.4.2,192.168.4.20,255.255.255.0,24h

start the dnsmasq sudo systemctl start dnsmasq

configure access point

open sudo nano /etc/hostapd/hostapd.conf

enter and change ssid, and password

interface=wlan0
driver=nl80211
ssid=NameOfNetwork
hw_mode=g
channel=7
wmm_enabled=0
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=8CHARPASSPHRASE
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP

any wrong typing here will cause the WAN to fail

enter sudo nano /etc/default/hostapd

find the line #DAEMON_CONF and replace it with DAEMON_CONF="/etc/hostapd/hostapd.conf"

start hostapd

sudo systemctl unmask hostapd
sudo systemctl enable hostapd
sudo systemctl start hostapd

open the wifi browser and ensure you can connect to the network You will now also be able to SSH into the machine again

Steps adapted from this guide

Run on startup

create a new task in the /etc/init.d directory sudo nano /etc/init.d/startFlask

enter the following into the file

#! /bin/sh
# /etc/init.d/startFlask
### BEGIN INIT INFO
# Provides:          main.py
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start daemon at boot time
# Description:       Enable service provided by daemon.
### END INIT INFO
 
case "$1" in
  start)
    echo "Starting flask"
    # run application you want to start
    sudo python3 /home/pi/flask/main.py &
    ;;
  stop)
    echo "Stopping flask"
    # kill application you want to stop
    killall python
    ;;
  *)
    echo "Usage: /etc/init.d/startFlask{start|stop}"
    exit 1
    ;;
esac
 
exit 0

save the file

run sudo chmod 755 /etc/init.d/startFlask to give it permissions