Mosca 💛 MQTTjs 💚 MySQL + MongoDB

1. Mosca & MQTT.js

• Click & watch video tutorial below! 👇

  

• Initiate a Node.js project then install Mosca & MQTT.js:

  $ npm init
  $ npm i mosca mqtt

• Create an MQTT broker (broker.js):

  // Mosca MQTT broker
  var mosca = require('mosca')
  var settings = {port: 1234}
  var broker = new mosca.Server(settings)
  
  broker.on('ready', ()=>{
      console.log('Broker is ready!')
  })
  
  broker.on('published', (packet)=>{
      message = packet.payload.toString()
      console.log(message)
  })

• Create an MQTT subscriber (sub.js):

  // MQTT subscriber
  var mqtt = require('mqtt')
  var client = mqtt.connect('mqtt://localhost:1234')
  var topic = 'LINTANGtest123'
  
  client.on('message', (topic, message)=>{
      message = message.toString()
      console.log(message)
  })
  
  client.on('connect', ()=>{
      client.subscribe(topic)
  })

• Create an MQTT publisher (pub.js):

  // MQTT publisher
  var mqtt = require('mqtt')
  var client = mqtt.connect('mqtt://localhost:1234')
  var topic = 'LINTANGtest123'
  var message = 'Hello World!'
  
  client.on('connect', ()=>{
      setInterval(()=>{
          client.publish(topic, message)
          console.log('Message sent!', message)
      }, 5000)
  })

2. Mosca, MQTT.js & MySQL

• Click & watch video tutorial below! 👇

  

• Create a database & table on MySQL:

  $ create database mqttJS;
  $ use mqttJS
  $ create table(
      id int not null auto_increment,
      message varchar(255),
      time timestamp default current_timestamp,
      primary key (id)
  );
  $ describe mqttJS

• Install MySQL.js:

  $ npm i mysql

• Create an MQTT broker (brokerMySQL.js):

  // MQTT broker
  var mosca = require('mosca')
  var settings = {port: 1234}
  var broker = new mosca.Server(settings)
  
  // MySQL 
  var mysql = require('mysql')
  var db = mysql.createConnection({
      host: 'localhost',
      user: 'lintang',
      password: '12345',
      database: 'mqttJS'
  })
  db.connect(()=>{
      console.log('Database connected!')
  })
  
  broker.on('ready', ()=>{
      console.log('Broker is ready!')
  })
  
  broker.on('published', (packet)=>{
      message = packet.payload.toString()
      console.log(message)
      if(message.slice(0,1) != '{' && message.slice(0,4) != 'mqtt'){
          var dbStat = 'insert into mqttJS set ?'
          var data = {
              message: message
          }
          db.query(dbStat, data, (error, output)=>{
              if(error){
                  console.log(error)
              } else {
                  console.log('Data saved to database!')
              }
          })
      }
  })

3. Mosca, MQTT.js & MongoDB

• Click & watch video tutorial below! 👇

  

• Create a database & collection on MongoDB:

  $ use mqttJS
  $ db.createUser({
      'user': 'lintang',
      'pwd': '12345',
      'roles': ['readWrite', 'dbAdmin']
  })
  $ db.createCollection('mqttJS')

• Install MongoDB.js:

  $ npm i mongodb

• Create an MQTT broker (brokerMongoDB.js):

  // MQTT broker
  var mosca = require('mosca')
  var settings = {port: 1234}
  var broker = new mosca.Server(settings)
  
  // MongoDB
  var mongo = require('mongodb')
  var mongc = mongo.MongoClient
  var url = 'mongodb://lintang:12345@localhost:27017/mqttJS'
  
  broker.on('ready', ()=>{
      console.log('Broker is ready!')
  })
  
  broker.on('published', (packet)=>{
      message = packet.payload.toString()
      console.log(message)
      if(message.slice(0,1) != '{' && message.slice(0,4) != 'mqtt'){
          mongc.connect(url, (error, client)=>{
              var myCol = client.db('mqttJS').collection('mqttJS')
              myCol.insertOne({
                  message: message
              }, ()=>{
                  console.log('Data is saved to MongoDB')
                  client.close()
              })
          })
      }
  })

Lintang Wisesa 💌 lintangwisesa@ymail.com

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