edm64 / speakersel-lite

Web interface for the multi-room audio controller (speaker select only)

pandorica-spksel

Web interface for the multi-room audio controller. Based on the project created by David Liu.

Project details: http://iceboundflame.com/projects/multi-room-audio-control-with-rpi

This fork is for a simpler project using the smaller, cheaper, and more recent model Raspberry Pi Zero W. It uses the same dual-coil latched relays for speaker switching, but drops the additional HiFi controls (because in my use case, the Yamaha MusicCast app takes care of those feature). It also integrates the protection switch for toggling impedance matching.

This is a Python 2.7/Flask application using jQuery Mobile.

control.py uses the RPi.GPIO Python module to pulse the GPIOs. Each execution will change the relay state to match. For instance:

sudo ./control.py            # Turn off all relays
sudo ./control.py 0 2 3      # Turn on relays 0, 2, and 3
sudo ./control.py 0 1 2 3    # Turn on all relays

spksel.py is the actual Flask web server. It serves the web interface, calling "sudo ./control.py" in order to turn rooms on and off.

This is designed to be run in a virtualenv, so unpack virtualenv and run ./setup to install the necessary packages.

Configuration notes

Raspberry Pi pins used

2   5V
6   GND
7   GPIO4
11  GPIO17
12  GPIO18
13  GPIO27
15  GPIO22
16  GPIO23
18  GPIO24
22  GPIO25
24  GPIO08
26  GPIO07
25  GND

To test the relay board, use control.py to make sure that all relays can click on and off. Adjust the PIN_MAP in control.py as necessary.

spksel

Install nginx via apt and configure it to serve a uWSGI site on /. Create spksel user, set up sudoers to allow "sudo control.py" without password.

Extract virtualenv, run ./setup in this repository to create "myenv" virtual environment and download Flask/Jinja2/other packages. Following deployment instructions at http://flaviusim.com/blog/Deploying-Flask-with-nginx-uWSGI-and-Supervisor/ :

. myenv/bin/activate
# After activating virtualenv:
pip install uwsgi   # takes a while to build on RPi, ~15 min

# Test:
uwsgi -s /tmp/spksel.sock -w spksel:app -H /home/spksel/spksel/myenv --chmod-socket=666  --processes 4 --threads 2 --stats 127.0.0.1:9191

Set up supervisord to run uwsgi on bootup.