I always enjoy listening to music with Volumio.
One thing I miss with Volumio was a hardware volume control like a radio. It is OK to change volume using a mobile phone, but it is much easier if I can change the volume with a knob.
Though there are many articles about changing volume with GPIO switches or encoders, the most familiar knob would be a wheel mouse.
As I am a novice programmer, your comments will be really appreciated.
For your information, I am using Raspberry pi 3B+ with Volumio 2.565 .
An USB DAC and a wheel mouse are connected to my Raspberry pi.
Specification:
- Rotate the wheel to change the volume
- Click the left button to select “Capital UK” (web radio) and the right button to select “Venice classic radio”.
Precedures:
- Prepare following “click.js”
This code is also available at the following site as “index.js” .
github.com/tullyz/mouse-volume
var Mouse = require('node-mouse');
var mouseDevice = new Mouse();
var InputEvent = require('input-event');
// find # of mouse event
const execSync = require('child_process').execSync;
const result = execSync('cat /proc/bus/input/devices | grep mouse0').toString();
n = result.indexOf("event")
var a = result.substring(n+5, n+6)
var input = new InputEvent('/dev/input/event'+a);
var eventDevice = new InputEvent.Mouse(input);
var io=require('socket.io-client');
var socket= io.connect('http://localhost:3000');
// set initial volume value
var vol = 10 ;
socket.emit('volume', vol);
// Create play lists if empty
socket.emit('listPlaylist');
socket.on('pushListPlaylist', function(data) {
if (data.length == 0) {
socket.emit('createPlaylist',{"name":"Venice Classic Radio"});
socket.emit('addToPlaylist',{
"name":"Venice Classic Radio",
"service":"webradio",
"uri":"http://174.36.206.197:8000"
});
socket.emit('createPlaylist',{"name":"Capital FM"});
socket.emit('addToPlaylist',{
"name":"Capital FM",
"service":"webradio",
"uri":"http://media-ice.musicradio.com/CapitalMP3"
});
}
});
var playstate = 1 ;
mouseDevice.on('click', function(e){
if (e.button === 0) {
// console.log("left click");
socket.emit('playPlaylist',{name:"Venice Classic Radio"});
}
if (e.button === 2) {
// console.log("right click");
socket.emit('playPlaylist',{name:"Capital FM"});
}
if (e.button === 1) {
// console.log("wheel click");
// socket.emit('prev');
// socket.emit('next');
if (playstate == 1) {
socket.emit('pause');
playstate = 0
}
else {
socket.emit('play');
playstate = 1
}
}
});
// volume setting
eventDevice.on('wheel', e => {
var direction = e.value === 1 ? 1 : -1
// get current volume value
socket.emit('getState', '');
socket.on('pushState', function(data) {
vol = data.volume ;
});
vol = vol + direction ;
// volume limitter
if (vol < 0) vol = 0 ;
if (vol > 50) vol = 50 ;
socket.emit('volume', vol);
})
- Login to Volumio and install the following node modules.
sudo su
npm install node-mouse
npm install socket.io-client
npm install input-event
npm install -g forever- Copy “click.js” to
/home/volumio- Run
/lib/node_modules/forever/bin/forever start /home/volumio/click.jsIf you turn the wheel, the display of Volumio will be linked, and if you click a button, the channel should be switched.
- If it is OK, write a node command in /etc/rc.local to run “click.js” automatically at restart.
nano /etc/rc.localPaste the following before “exit 0”.
/lib/node_modules/forever/bin/forever start /home/volumio/click.jsWhen you reboot, “click.js” should run.