v0.2.0 has brough some API breaking changes to mqtt.js. Please consult the migration guide for information or open an issue if you need any help.
mqtt.js is a library for the MQTT protocol, written in javascript.
npm install mqtt
Detailed documentation can be found in the wiki
See: examples/client
Simple publish client:
var mqtt = require('mqtt')
, client = mqtt.createClient();
client.publish('messages', 'mqtt');
client.publish('messages', 'is pretty cool');
client.publish('messages', 'remember that!', {retain: true});
client.end();
Simple subscribe client:
var mqtt = require('mqtt')
, client = mqtt.createClient();
client.subscribe('messages');
client.publish('messages', 'hello me!');
client.on('message', function(topic, message) {
console.log(message);
});
Chainable API!:
var mqtt = require('mqtt')
, client = mqtt.createClient();
client
.subscribe('messages')
.publish('presence', 'bin hier')
.on('message', function(topic, message) {
console.log(topic);
});
A broadcast server example, included in examples/broadcast.js
:
var mqtt = require('mqtt');
mqtt.createServer(function(client) {
var self = this;
if (!self.clients) self.clients = {};
client.on('connect', function(packet) {
client.connack({returnCode: 0});
client.id = packet.clientId;
self.clients[client.id] = client;
});
client.on('publish', function(packet) {
for (var k in self.clients) {
self.clients[k].publish({topic: packet.topic, payload: packet.payload});
}
});
client.on('subscribe', function(packet) {
var granted = [];
for (var i = 0; i < packet.subscriptions.length; i++) {
granted.push(packet.subscriptions[i].qos);
}
client.suback({granted: granted});
});
client.on('pingreq', function(packet) {
client.pingresp();
});
client.on('disconnect', function(packet) {
client.stream.end();
});
client.on('close', function(err) {
delete self.clients[client.id];
});
client.on('error', function(err) {
client.stream.end();
console.log('error!');
});
}).listen(1883);