homebridge-mqtt-eve-temp-hum/lib/MQTTClient.js

A HomeBridge plugin for MQTT temperature sensors (EVE) including History-Data.

const EventEmitter = require('events');
const mqtt = require('mqtt');

class MQTTClient extends EventEmitter {
  constructor(config) {
    super()
    this.mqtt = mqtt.connect(config.url, {
      keepalive: 10,
      clientId: 'mqttjs_'.concat(Math.random().toString(16).substr(2, 8)),
      protocolId: 'MQTT',
      protocolVersion: 4,
      clean: true,
      reconnectPeriod: 1000,
      connectTimeout: 30 * 1000,
      will: {
        topic: 'WillMsg',
        payload: 'Connection Closed abnormally..!',
        qos: 0,
        retain: false,
      },
      username: config.username,
      password: config.password,
      rejectUnauthorized: false
    });
  
    this.mqtt.on('connect', () => {
      this.emit('connected', null)
      this.mqtt.subscribe(config.topic)
    });
  
    this.mqtt.on('message', (topic, message) => {
      const mqttData = JSON.parse(message)
      if (mqttData === null) return
        
      const temperature = parseFloat(mqttData.temperature);
      const humidity = parseInt(mqttData.humidity);

      this.emit('temperatureChange', temperature)
      this.emit('humidityChange', humidity)
    });
  }
}

module.exports = { MQTTClient };