turbomatte
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4 months ago KAMAL CODE 19.04.2024
const mqtt = require('mqtt')
/***
* Browser
* This document explains how to use MQTT over WebSocket with the ws and wss protocols.
* EMQX's default port for ws connection is 8083 and for wss connection is 8084.
* Note that you need to add a path after the connection address, such as /mqtt.
*/ //const url = 'ws://broker.emqx.io:8083/mqtt'
const url = 'mqtt-broker.zdw31.cloud'
/***
* Node.js
* This document explains how to use MQTT over TCP with both mqtt and mqtts protocols.
* EMQX's default port for mqtt connections is 1883, while for mqtts it is 8883.
*/ // const url = 'mqtt://broker.emqx.io:1883'
// Create an MQTT client instance
const options = {
// Clean session
clean: true,
connectTimeout: 4000,
// Authentication
clientId: 'user1',
username: 'user1',
password: 'HWSFI2024!',
}
const client = mqtt.connect(url, options)
client.on('connect', function () {
console.log('Connected')
// Subscribe to a topic
client.subscribe('test', function (err) {
if (!err) {
// Publish a message to a topic
client.publish('test', 'Hello mqtt')
} })
})
// Receive messages
client.on('message', function (topic, message) {
// message is Buffer
console.log(message.toString())
client.end()
})
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