All based on Raspberry Zero W with an "Debian Stretch" installed!
Hi, Now that I spent some nights connecting my Raspberry Zero W to the echo via Bluetooth, I decided to write this blog.
What do you need:
- a Raspberry Pi Zero W
- Amazon Echo
- I hope only a fraction of the time I needed
I start with this introduction from the ground state after the installation. For the basic device I wrote this blog: Basic installation
Here we go!
1.) Bluetooth installation
It is important to assign the user groups. Unfortunately, this is missing in many descriptions in the INet.
sudo apt-get install bluetooth bluez bluez-tools bluez-firmware alsa-tools
sudo gpasswd -a pi bluetooth
sudo gpasswd -a root bluetooth
2.) Pulseaudio installation
sudo apt-get install pulseaudio pulseaudio-module-bluetooth
sudo gpasswd -a pi pulse-access
sudo gpasswd -a pi lp
sudo gpasswd -a pi pulse
sudo gpasswd -a pulse lp
sudo gpasswd -a pulse audio
sudo gpasswd -a pulse bluetooth
sudo gpasswd -a pulse input
sudo gpasswd -a root audio
sudo gpasswd -a root pulse
sudo gpasswd -a root pulse-access
cd ~
wget -O pulse "https://docs.google.com/uc?export=download&id=1HpO5JHcY64g06Zig7PPijtBwRjfgVFHp"
sudo cp pulse /etc/init.d
sudo chmod +xwr,+xr,+xr /etc/init.d/pulse
sudo update-rc.d pulse defaults
sudo update-rc.d pulse enable
configure Pulse as service
sudo cp /etc/pulse/system.pa /etc/pulse/system.org
sudo pico /etc/pulse/system.pa
Now enter the following at the end of the file:
## --Ich start
### Automatically load driver modules for Bluetooth hardware
.ifexists module-bluetooth-policy.so
load-module module-bluetooth-policy
.endif
.ifexists module-bluetooth-discover.so
load-module module-bluetooth-discover
.endif
##wird benötigt damit man über TCP/IP auf Pulse zugreifen kann
load-module module-native-protocol-tcp auth-anonymous=1 auth-ip-acl=127.0.0.1
## --Ich ende
3.) Now it's time
We start now the Pulseaudio service and see if everything is there.
sudo service pulse start
If it looks like that, everything is good :-)
Now we have to register our Raspberry on the Alexa, you should see your bluetooth controller in /var /lib/bluetooth/.
If you want to give your controller a special name, edit /var/lib/bluetooth/<Bluetooth MAC>/settings
In my case, I call my Bluetooth controller Hugo.
[General]
Name = Hugo
So now execute the following commands:
sudo service bluetooth restart
bluetoothctl
The following output should appear:
Now enter the following commands:
scan on
agent on
Start now on the phone the Alexa App and go into the Bluetooth device and then press "NEW DEVICE".
After some time bluetoothctl shows the following line:
The Mac address will be different for you, so replace it with your own in the following commands!
pair FC:A1:83:B5:8C:E7
trust FC:A1:83:B5:8C:E7
exit
The following should be displayed:
We are now creating the configuration of Pulse for the user PI.
cd ~
pico .asoundrc
Fügt folgenden Inhalt ein:
pcm.pulse {
type pulse
}
ctl.pulse {
type pulse
}
pcm.!default {
type pulse
}
ctl.!default {
type pulse
}
Reboot PI
sudo reboot
Now we can connect our Raspberry to the Alexa, now enter the following commands:
bluetoothctl
connect FC:A1:83:B5:8C:E7
exit
Now comes the final test:
sudo install mpg321
wget -O test.mp3 "https://docs.google.com/uc?export=download&id=1IEe2Teo87RYudCqigxXGCWpSiIFDVnGC"
mpg321 test.mp3
Important when bluetooth play the sound only 1-3 second,
the problem is the UART driver.
You must disable it in /boot/config.txt with enable_uart=0.
Edit or add this line at /boot/conig.txt:
If everything is well you should hear something on your echo :-)
Debugging Bluetooth helps you if somehow not work.
For Bluetooth with the command:
sudo sed -i 's/bluetoothd/bluetoothd \-d/g' /lib/systemd/system/bluetooth.service
sudo systemctl daemon-reload
yodablue.py
The Bluetoothctl tool is not so handy for automation, while the other tools like bt-device on my Rpi not work i write a little python script to connect and disconnect from a device.
Please install the follow Python packages with Pip:
sudo apt-get install libdbus-1-dev
sudo apt-get install libdbus-glib-1-dev
sudo pip install dbus-python
sudo pip install bluetool
sudo apt-get install python-bluez
connect to device :
python yodablue.py -c FC:A1:83:B5:8C:E7
disconnect from device :
python yodablue.py -d FC:A1:83:B5:8C:E7
This is the code from
yodablue.py to connect and disconnect :
#!/usr/bin/python
from bluetool import Bluetooth
import sys, getopt
def main(argv):
bluetooth = Bluetooth()
res = False
if len(sys.argv) != 3:
print 'yodablue.py -c |-d '
sys.exit(2)
if (sys.argv[1] =='-c'):
print 'connect to',sys.argv[2]
res = bluetooth.connect(sys.argv[2])
if (sys.argv[1] =='-d'):
print 'disconnect from',sys.argv[2]
res = bluetooth.disconnect(sys.argv[2])
if res == False:
print 'fail'
sys.exit(1)
else:
print 'OK'
sys.exit(0)
if __name__ == "__main__":
main(sys.argv[1:])
