Method constructor

example/multiple-things.js:118–150

()

 */
class FakeGpioHumiditySensor extends Thing {
  constructor() {
    super(
      'urn:dev:ops:my-humidity-sensor-1234',
      'My Humidity Sensor',
      ['MultiLevelSensor'],
      'A web connected humidity sensor'
    );

    this.level = new Value(0.0);
    this.addProperty(
      new Property(
        this,
        'level',
        this.level,
        {
          '@type': 'LevelProperty',
          title: 'Humidity',
          type: 'number',
          description: 'The current humidity in %',
          minimum: 0,
          maximum: 100,
          unit: 'percent',
          readOnly: true,
        }));

    // Poll the sensor reading every 3 seconds
    setInterval(() => {
      // Update the underlying value, which in turn notifies all listeners
      const newLevel = this.readFromGPIO();
      console.log('setting new humidity level:', newLevel);
      this.level.notifyOfExternalUpdate(newLevel);
    }, 3000);
  }

  /**
   * Mimic an actual sensor updating its reading every couple seconds.