mqtt_shortener.js

var mqtt = require('mqtt');
var HOST = '192.168.43.10';
var client  = mqtt.connect("mqtt:\/\/" + HOST, { port: 1883 });

client.on('connect', function () {
    console.log("Connected to " + HOST);
    client.subscribe('hermes/intent/#');
});

client.on('message', function (topic, message) {
    // When receiving an MQTT message, trigger and action...
    if (topic.startsWith('hermes/intent/')) {
        var payload = JSON.parse(message);
        var name = payload["intent"]["intentName"];
        var slots = payload["slots"];
        var value = slots[0].rawValue;
        console.log('Intent: '+ name);
        console.log(' value: '+value);

        client.publish('R8J4/move', value);
 }
});