index.js

/*
* constellation-dht-sensor
* Retrieve temperature & humitidy from a dht sensor
* Push to Constellation platform
*/

var ConstellationHub = require('constellation-nodejs');
var ctx = new ConstellationHub();

var forgeValueObject = (temperature, humidity, room) => {
    return {
        "Temperature": temperature,
        "Humidity" : humidity,
        "Room": room,
        "Category": "Ambient Sensor",
    };
}

var getValues = (ctx) => {

    //// Refreshing settings
    ctx.hub.server.requestSettings()
        .then((settings, err) => {
            if (!settings || !settings.dht || !settings.room || !settings.gpio)
            {
                ctx.hub.server.writeLog("You must set setting values to use this package : dht(11,22) ,  gpio, room.", "error");
                return;
            }

            sensor.read(settings.dht, settings.gpio, function(err, temperature, humidity) {
                if (!err) {
                    forgeValueObject(temperature.toFixed(1), humidity.toFixed(1), settings.room);
                    ctx.hub.server.pushStateObject("" + currency, po, "Sensor.DHTAmbientSensor", 0);
                } else ctx.hub.server.writeLog("Error while retrieving values from DHT Sensor : ", error);
            });
        });
}

//// Create a Sentinel Hub
ctx.Sentinel("Corulag")
    .then((ctx) => {
        ctx.on('connected', () => {
            console.log("Connected to platform Constellation");
            setInterval(getValues.bind(null, ctx), 10000)
        });
        return ctx.connect();
    });