mqtt_server/lib/mqtt/mqttClient.js

const mqtt = require('mqtt');
const request = require('request');
let util = require('util');
const logger = require('log4js').getLogger();

const EventEmitter = require('events');
let Minibus = require('minibus');

// var db = require('../server/db-connector').dbConnection;

//var nano = require('nano')('http://martind2000:1V3D4m526i@localhost:5984');
//var nano = require('nano')('http://localhost:5984');

let db_name = 'mqtt';
//var dbCouch = nano.use(db_name);

var globalMode = 'FanOff';
var lastDispatch = 0;


const mqttClient = function (events) {

  const orgId = '';
  const userName = '';
  const appKey = 'bob';

  this.livingRoom = {
    temp: 0,
    last: 0
  };
  let mode = 'FanOff';

  const d = new Date();
  this.lastMsg = d.getTime();

  events.on('sendIFTTT', function (mode) {
    const url = ['https://maker.ifttt.com/trigger/', mode, '/with/key/cWvECkeiyAPwmiOPBkXL2D'].join('');

    if (mode !== globalMode)
    {
    console.log('Sending..');
    	globalMode = mode;
        request(url, function (error, response, body) {
    //      if (!error && response.statusCode === 200) {
            console.log(response, body);
     //     }
        });

     var d = new Date();
      lastDispatch = d.getTime();
    } else {
     console.log('Not sent...');
    }
      });

  this.fanTimer = function () {
    'use strict';
    const now = new Date;
    const mod = 900000 - (now.getTime() % 900000);

    if (globalMode === 'FanOff') {
      console.log('Fans off, temp should be  <= 19.5');
      mode = (parseFloat(this.livingRoom.temp) <= 19.5) ? 'FanOn' : 'FanOff';
    } else {
      console.log('Fans on, temp should not be less than 22.5');
      mode = (parseFloat(this.livingRoom.temp) <= 22.5) ? 'FanOn' : 'FanOff';
    }

    let n = new Date();
    n = n.getTime() - this.lastMsg;
    console.log('Last msg', n);

    if (n >= 600000) {
      console.error('No message received for over 10 minutes');
      mode = 'FanOff';
	throw new error('Ejecting for restart');
    }

    logger.info('LR temp:', this.livingRoom.temp);

    events.emit('sendIFTTT', mode);
    const data = {id: 'temperature', data: {mode: globalMode, temp: this.livingRoom.temp}};
    events.emit('sendSocket', data);

    setTimeout(this.fanTimer.bind(this), mod + 10);
  };

  this.lighting = 'lights';

  this.connected = false;

  const options = {
    keepalive: 3600,
    clientId: 'a:' + orgId + ':' + Date.now(),
    username: userName,
    password: new Buffer(appKey)

  };

  this.client = mqtt.connect('mqtt://' + orgId + 'silvrtree.co.uk', options);

  this.client.on('connect', function () {
    connected = true;
    logger.info('Connected to SIlvr Broker');
    this.fanTimer();
  }.bind(this));

  this.client.subscribe('livingroomTemp');

  this.client.on('message', function (topic, message) {

    const json = JSON.parse(message.toString());
    logger.debug(json);
    logger.debug(json.temp);

    this.livingRoom.temp = parseFloat(json.temp);
    console.log('lr:',this.livingRoom.temp, this.livingRoom.temp >= 22.6);
    if (this.livingRoom.temp >= 22.7) {
      console.log('Max temp reached, turn off');
      events.emit('sendIFTTT', 'FanOff');
    }
    const d = new Date();
    this.lastMsg = d.getTime();

    const data = {id: 'temperature', data: {mode: globalMode, temp: this.livingRoom.temp}};
    events.emit('sendSocket', data);

  }.bind(this));

  this.isConnected = function () {
    return this.connected;
  };

};

module.exports.mqttClient = mqttClient;