var mqtt = require(\'mqtt\');
var client = mqtt.connect(\'mqtt://test.mosquitto.org\');
client.on(\'connect\', function () {
client.subscribe(\'presence\');
client.publish(\'presence\', \'Hello mqtt\');
});
client.on(\'message\', function (topic, message) {
// message is Buffer
console.log(message.toString());
client.end();
});