Reve quantique

systemctl status reve_quantique.service

Information

• For uploading a file and testing: http://10.9.8.1:8090/

• For configuring and changing playback mode: http://10.9.8.1:9090/

• For status: http://10.9.8.1:8090/status/osc

Connect your OSC app :

- target ip : 10.9.8.1
- target port : 57121

⚠️

Please keep const motorHat = {} as en empty object. If you need to run the code without a raspberry pi please comment motorHat line definition and comment import MotorHat from 'motor-hat'. Then uncomment both lines :

// const MotorHat = null
// const motorHat = null

Conditionnal import should be improved.

How it works

We receive data through OSC and we manipulate the data. The data received are an array of value. This array changes with time. We can average and moving avarage the value. We also have the ability to pick a speed within a range of value.

Use the getSpeedPerRange function to find which "tableau" should play for what value. A "tableau" is the name for a specific speed. getSpeedPerRange returns a speed.

The set of painting/tableau is described like this :

const paintings = [{
  name: 'reve-1',
  min: -1, 
  max: -0.8,
  speed: -20
}, {
  name: 'reve-2',
  min: -0.79, 
  max: -0.4,
  speed: -15
}, {
  name: 'reve-3',
  min: -0.39, 
  max: -0.2,
  speed: -10
}, {
  name: 'reve-4',
  min: -0.19, 
  max: -0.1,
  speed: -5
}, {
  name: 'reve-5',
  min: -0.09, 
  max: 0.09,
  speed: 0
}, {
  name: 'reve-6',
  min: 0.1, 
  max: 0.19,
  speed: 5
}, {
  name: 'reve-7',
  min: 0.2, 
  max: 0.39,
  speed: 10
}, {
  name: 'reve-8',
  min: 0.4, 
  max: 0.79,
  speed: 15
}, {
  name: 'reve-9',
  min: 0.8, 
  max: 1,
  speed: 20
}]

So you can simply change the speed value and adujst min and max accordingly to the desired effect. Use the paintSpeed function to use this mapping.

Service unit for reve quantique

cd /lib/systemd/system
vim /lib/systemd/system/reve_quantique.service

[Unit]
Description=Reve quantique controll motor and use OSC
Documentation=https://github.com/soixantecircuits/reve-quantique
After=network.target

[Service]
Type=simple
User=player
WorkingDirectory=/opt/bin/reve-quantique
ExecStart=/opt/player/.nvm/versions/node/v14.17.6/bin/node /opt/bin/reve-quantique/index.mjs
Restart=on-failure

[Install]
WantedBy=multi-user.target

Adding service to systemd

systemctl daemon-reload

Enable at start systemctl enable reve_quantique.service

logging removal

sudo service rsyslog stop

Then, you can disable it at boot:

sudo systemctl disable rsyslog

to enable it again at boot:

sudo systemctl enable rsyslog

Configuration

df -h
du -s * | sort -nr
truncate daemon.log --size 0
rm syslog.1
truncate syslog --size 0
service rsyslog stop
systemctl disable rsyslog
vim /lib/systemd/system/reve_quantique.service

[Service]
StandardOutput=null

systemctl daemon-reload
systemctl restart reve_quantique.service
systemctl status reve_quantique.service
journalctl -fu reve_quantique.service

to enable it again at boot:

sudo systemctl enable rsyslog

[Service]
#StandardOutput=null