Promise wrapper over MQTT.js
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RangerMauve Merge pull request #8 from Tomotoes/patch-1
[fix] index.js Duplicate method declaration
Latest commit 7dd2594 Jun 7, 2018

README.md

async-mqtt

Promise wrapper over MQTT.js


IMPORTANT: Make sure you handle rejections from returned promises because they won't crash the process

API

The API is the same as MQTT.js, except the following functions now return promises instead of taking callbacks

  • publish
  • subscribe
  • unsubscribe
  • end

Example

var MQTT = require("async-mqtt");

var client = MQTT.connect("tcp://somehost.com:1883");

// When passing async functions as event listeners, make sure to have a try catch block
client.on("connect", doStuff);

async function doStuff() {

	console.log("Starting");
	try {
		await client.publish("wow/so/cool", "It works!");
		// This line doesn't run until the server responds to the publish
		await client.end();
		// This line doesn't run until the client has disconnected without error
		console.log("Done");
	} catch (e){
		// Do something about it!
		console.log(e.stack);
		process.exit();
	}
}

Wrapping existing client

var AsyncClient = require("async-mqtt").AsyncClient;

var client = getRegularMQTTClientFromSomewhere();

var asyncClient = new AsyncClient(client);

asyncClient.publish("foo/bar", "baz").then(function(){
	console.log("We async now");
	return asyncClient.end();
});