AIY google voice autostart on boot

Steps required to get AIY voice working without manually starting the google assistant demo program.

1. In a Terminal shell, type

sudo leafpad /etc/systemd/system/voice_recognizer.service 

It will open Text Editor with an empty file. Put the following contents

[Unit]
Description=voice recognizer
After=network.target ntpdate.service

[Service]
Environment=DISPLAY=:0
Environment=PATH=/home/pi/AIY-projects-python/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ExecStartPre=/bin/sleep 60
ExecStart=/usr/bin/python3 -u src/main.py
TimeoutSec=infinity
WorkingDirectory=/home/pi/AIY-projects-python
StandardOutput=inherit
StandardError=inherit
Restart=always
RestartSec=60
User=pi

[Install]
WantedBy=multi-user.target

1. Save the file (File->Save) and exit the Text editor(File->Quit).

2. To confirm you did steps 1 and 2 correctly, type the following:

   cat /etc/systemd/system/voice_recognizer.service
   

   It should print out the contents of the file.

3. Type the following:

   cp /home/pi/AIY-project-python/src/examples/voice/assistant_library_with_button_demo.py /home/pi/AIY-project-python/src/main.py
   

4. Type the following commands:

   sudo systemctl daemon-reload
   sudo systemctl enable voice_recognizer
   sudo reboot
   

5. The system will reboot. The startup script will take 2 minutes to come into action, after which time the button should start glowing.