A script for the Raspberry Pi that turns on a Powerswitch when the user says "Lumos!"

index.js

const record = require('node-record-lpcm16');
const {Detector, Models} = require('./node_modules/snowboy/');
const Gpio = require('onoff').Gpio;

// Set up control of the pin that toggles the Powerswitch
power = new Gpio(14, 'out');
var on = false;

// Turn the power off by default
power.writeSync(0);

const models = new Models();

// Add "Lumos!" hotword
models.add({
  file: 'Lumos.pmdl',
  sensitivity: '0.5',
  hotwords : 'lumos'
});

// Add "Nox!" hotword
models.add({
  file: 'Nox.pmdl',
  sensitivity: '0.5',
  hotwords : 'nox'
});

const detector = new Detector({
  resource: "./node_modules/snowboy/resources/common.res",
  models: models,
  audioGain: 2.0
});

detector.on('silence', function () {
});

detector.on('sound', function () {
  console.log('sound');
});

detector.on('error', function () {
  console.log('error');
});

detector.on('hotword', function (index, hotword) {
  console.log('hotword', index, hotword);
  if(hotword == 'lumos')
    // Turn on power to lights
    power.writeSync(1);
  else if(hotword == 'nox')
    // Turn off power
    power.writeSync(0);
});

const mic = record.start({
  threshold: 0,
  verbose: true
});

mic.pipe(detector);