node_helper.js

"use strict";

/* Magic Mirror
 * Module: MMM-DHT-Sensor
 *
 * By Ricardo Gonzalez http://www.github.com/ryck/MMM-DHT-Sensor
 * MIT Licensed.
 */

const NodeHelper = require("node_helper");
const sensor = require("node-dht-sensor");

module.exports = NodeHelper.create({
  start: function () {
    console.log("MMM-DHT-Sensor helper started ...");
  },
  /**
   * readSensor()
   * Requests sensor data.
   */
  readSensor: function (sensorPin, sensorType) {
    var self = this;
    sensor.read(sensorType, sensorPin, function (err, temperature, humidity) {
      if (!err) {
        self.sendSocketNotification("SENSOR_DATA", {
          temperature: temperature.toFixed(2),
          humidity: humidity.toFixed(2),
        });
      } else {
        self.sendSocketNotification("SENSOR_DATA", {
          temperature: null,
          humidity: null,
        });
        console.log(err);
      }
    });
  },

  //Subclass socketNotificationReceived received.
  socketNotificationReceived: function (notification, payload) {
    if (notification === "GET_SENSOR_DATA") {
      this.readSensor(payload.sensorPin, payload.sensorType);
    }
  },
});