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mqtt.cool-web-client

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mqtt.cool-web-client

JavaScript library for the development of MQTT.Cool clients running inside the web browser

2.0.0
latest
npm

Version published: 3 years ago

Weekly downloads: 210; increased by191.67%

Maintainers: 1

Weekly downloads

Created: 8 years ago

Source

MQTT.Cool Web Client

Overview

The MQTT.Cool Web Client is a JavaScript library for the development of MQTT.Cool clients running inside the web browser.

The library enables any HTML page to act as an MQTT client; that is, ready to send and receive real-time MQTT messages to/from any MQTT broker connected to the MQTT.Cool server.

Installation

npm

The library is available as npm package, so you can download and install it through:

npm install mqtt.cool-web-client

Then load it from local node_modules:

<html>
<head>
  <script src="./node_modules/mqtt.cool-web-client/dist/mqtt.cool.js"></script>
  ...
</html>

cdn

The library is also available on unpkg, to which you can point directly in the script tag:

<script src="https://unpkg.com/mqtt.cool-web-client@2.0.0/dist/mqtt.cool.js"></script>

Development

Open a session against the MQTT.Cool server, create an MQTT client and connect to the MQTT broker:

mqttcool.openSession('http://my.MQTT.Cool.server:8080', 'my_user', 'my_password', {
  onConnectionSuccess: function(mqttCoolSession) {
    var client = mqttCoolSession.createClient('my_mqtt_broker', 'my_client_id');
    client.connect({
      onSuccess: function() {
        console.log("Connected!");
      }
    });
    ...
  }
});

Request a Subscription:

client.subscribe("my/cool/topic");

Listen for messages:

client.onMessageArrived = function(message) {
  console.log("onMessageArrived:" + message.payloadString);
}

Publish a Message to the server:

message = new mqttcool.Message("My Message!");
message.destinationName = "my/cool/topic";
client.send(message)

Compatibility

Compatible with MQTT.Cool since version 1.2.0.
Based on Lightstreamer SDK for Web Clients version 8.0.3 build 1800.
Compatible with code developed with the previous version.

Changelog

See detailed changes on https://mqtt.cool/download/changelog/?component=web&version=2.0.0

Documentation

API Reference
Chapter "Client Application Development" of Getting Started Guide

For further details, visit the SDK section on the MQTT.Cool site.

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Package last updated on 25 Oct 2021

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