buttonPlaya

Use my raspberry pi to play an m3u playlist and light LED when a button is pushed.

What happened

• I installed mopidy to serve the mp3s. That makes this program a very basic mopidy client.
• I wrote this simple python program (buttonPlaya) to do actions using the mopidy post rpc api
• Button and LED programming is via hard-coded pin numbers in main.py
• Control is via playlists. Playlists are hard-coded in playa.py
• Songs on those playlists will be played.

Starting with system

• Goal: set up buttonPlaya to start when system starts
• Done: i added 'python3 /home/pi/projects/ButtonPlaya/buttonPlaya/main.py &' to /etc/rc.local (note the '&' starts it in a separate thread)

To do

- Add pause functionality

• Have LED blink while playlist is being loaded

Run before adding to rc.local

to run: start raspberry pi then navigate to projects/ButtonPlaya/buttonPlaya run 'python3 main.py'

How to change music:

• use scp to connect to raspberry pi
• add files to /home/pi/mopidy/files
• update playlists in /home/pi/mopidy/playlists
• playlists are m3u files referencing tracks in /home/pi/mopidy/files
• if adding or changing a playlist name, update /home/pi/projects/ButtonPlaya/buttonPlaya/playa.py

Notes

• mopidy has mixer
• but can change overall system volume with alsamixer
• requires gpiozero

Links

• Mopidy POST JSON-RPC API: https://docs.mopidy.com/en/latest/api/http/

Mopidy setup notes:

• service config: /etc/mopidy/mopidy.conf
• i set media files dir to /home/pi/mopidy/files
• i set m3u dir to /home/pi/mopidy/playlists
• run as service: sudo systemctl start mopidy
• check status: sudo systemctl status mopidy