node-wot Tutorial Exposed Thing

myTemperatureThing.js

WoT.produce({
    title: "TemperatureController",
    description: "A Thing to control the temperature of the room and also get alerts in too high temperatures",
    properties: {
        temperature: {
            type: "integer",
            description: "Current temperature value",
            observable: true,
            readOnly: true,
            unit:"Celcius"
        }
    },
    actions: {
        increment: {
            description: "Incrementing the temperature of the room with 0 to 5 increments",
            input:{
                type: "integer",
                minimum: 0,
                maximum: 5
            }
        },
        decrement: {
            description: "Decrementing the temperature of the room with 0 to 5 increments",
            input:{
                type: "integer",
                minimum: 0,
                maximum: 5
            }
        }
    },
    events: {
        overheat: {
            description: "Alert sent when the room temperature is too high"
        }
    }
})
    .then(function (thing) {
    console.log("Produced " + thing.getThingDescription().title);
    // init property values
    thing.writeProperty("temperature", getTemperature());

    thing.setPropertyReadHandler("temperature",function(){
        return new Promise((resolve, reject) => {
            resolve(getTemperature());
        });
    });

    // set action handlers
    thing.setActionHandler("increment", function (value, options) {
        changeTemperature(getTemperature()+value)
    });

    thing.setActionHandler("decrement", function (value, options) {
        changeTemperature(getTemperature()-value)
    });

    // check the temperature every 5 seconds, alert if temperature too high
    setInterval(() => {
        var curTemp = getTemperature();
        console.log("current temperature is ",curTemp)
        thing.writeProperty("temperature",curTemp)
        if (curTemp > 5) {
            thing.emitEvent("overheat")
        }
    }, 5000);

    // expose the thing
    thing.expose().then(function () { console.info(thing.getThingDescription().title + " ready"); });

    function getTemperature() {
        // normally, you would call the temperature sensor's function to read the actual temperature value
        // return new Promise((resolve, reject) => {
            return Math.random() * Math.floor(50);
            // resolve(5); //uncomment to test incrementing etc.
        //  });
    }

    function changeTemperature(newValue){
        // normally, you would do physical action to change the temperature
        //do nothing
        thing.writeProperty("temperature",newValue);
        return;
    }
})
    .catch(function (e) {
    console.log(e);
});