playbulbCandle.js

(function() {
  'use strict';

  let encoder = new TextEncoder('utf-8');
  let decoder = new TextDecoder('utf-8');

  const CANDLE_SERVICE_UUID = 0xFF02;

  const CANDLE_DEVICE_NAME_UUID = 0xFFFF;
  const CANDLE_COLOR_UUID = 0xFFFC;
  const CANDLE_EFFECT_UUID = 0xFFFB;

  class PlaybulbCandle {
    constructor() {
      this.device = null;
      this._isEffectSet = false;
    }
    connect() {
      let options = {filters:[{services:[ CANDLE_SERVICE_UUID ]}],
                     optionalServices: ['battery_service']};
      return navigator.bluetooth.requestDevice(options)
      .then(device => {
        this.device = device;
        return device.gatt.connect();
      });
    }
    getDeviceName() {
      return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
      .then(service => service.getCharacteristic(CANDLE_DEVICE_NAME_UUID))
      .then(characteristic => characteristic.readValue())
      .then(data => {
        let decoder = new TextDecoder('utf-8');
        return decoder.decode(data);
      });
    }
    setDeviceName(name) {
      return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
      .then(service => service.getCharacteristic(CANDLE_DEVICE_NAME_UUID))
      .then(characteristic => {
        let encoder = new TextEncoder('utf-8');
        return characteristic.writeValue(encoder.encode(name));
      });
    }
    getBatteryLevel() {
      return this.device.gatt.getPrimaryService('battery_service')
      .then(service => service.getCharacteristic('battery_level'))
      .then(characteristic => characteristic.readValue())
      .then(data => data.getUint8(0));
    }
    setColor(r, g, b) {
      return Promise.resolve()
      .then(() => {
        if (!this._isEffectSet) {
          return Promise.resolve();
        }
        // Turn off Color Effect first.
        let data = new Uint8Array([0x00, r, g, b, 0x05, 0x00, 0x01, 0x00]);
        return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
        .then(service => service.getCharacteristic(CANDLE_EFFECT_UUID))
        .then(characteristic => characteristic.writeValue(data));
      })
      .then(() => {
        let data = new Uint8Array([0x00, r, g, b]);
        return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
        .then(service => service.getCharacteristic(CANDLE_COLOR_UUID))
        .then(characteristic => characteristic.writeValue(data))
        .then(() => [r,g,b]);
      });
    }
    setCandleEffectColor(r, g, b) {
      let data = new Uint8Array([0x00, r, g, b, 0x04, 0x00, 0x01, 0x00]);
      return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
      .then(service => service.getCharacteristic(CANDLE_EFFECT_UUID))
      .then(characteristic => characteristic.writeValue(data))
      .then(_ => {
        this._isEffectSet = true;
        return [r,g,b];
      });
    }
    setFlashingColor(r, g, b) {
      let data = new Uint8Array([0x00, r, g, b, 0x00, 0x00, 0x1F, 0x00]);
      return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
      .then(service => service.getCharacteristic(CANDLE_EFFECT_UUID))
      .then(characteristic => characteristic.writeValue(data))
      .then(_ => {
        this._isEffectSet = true;
        return [r,g,b];
      });
    }
    setPulseColor(r, g, b) {
      // We have to correct user color to make it look nice for real...
      let newRed = Math.min(Math.round(r / 64) * 64, 255);
      let newGreen = Math.min(Math.round(g / 64) * 64, 255);
      let newBlue = Math.min(Math.round(b / 64) * 64, 255);
      let data = new Uint8Array([0x00, newRed, newGreen, newBlue, 0x01, 0x00, 0x09, 0x00]);
      return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
      .then(service => service.getCharacteristic(CANDLE_EFFECT_UUID))
      .then(characteristic => characteristic.writeValue(data))
      .then(_ => {
        this._isEffectSet = true;
        return [r,g,b];
      });
    }
    setRainbow() {
      let data = new Uint8Array([0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x01, 0x00]);
      return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
      .then(service => service.getCharacteristic(CANDLE_EFFECT_UUID))
      .then(characteristic => characteristic.writeValue(data))
      .then(_ => {
        this._isEffectSet = true;
        return [r,g,b];
      });
    }
    setRainbowFade() {
      let data = new Uint8Array([0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x26, 0x00]);
      return this.device.gatt.getPrimaryService(CANDLE_SERVICE_UUID)
      .then(service => service.getCharacteristic(CANDLE_EFFECT_UUID))
      .then(characteristic => characteristic.writeValue(data))
      .then(_ => {
        this._isEffectSet = true;
        return [r,g,b];
      });
    }
  }

  window.playbulbCandle = new PlaybulbCandle();

})();