George Kartsonas
Published © GPL3+

Smart home climatic control

All in one temperature control center.

IntermediateFull instructions provided1 hour1,629
Smart home climatic control

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Code

Temperature Sensor Code

JavaScript
Basically what this code does is read the temperature from the temperature sensor and in turn the Edison sends it to Artik Cloud.
var ID = '<Device ID>';  //Device ID from ARTIK Cloud
var TOKEN = '<Device Token>'; //Device Token from ARTIK Cloud

var mraa = require('mraa'); // mraa library for access to gpio
var mqtt = require('mqtt'); // mqtt messaging library for communicating with ARKTK
                           
var analogPin0 = new mraa.Aio(0); //setup access analog input Analog pin 0 (A0)
var B = 3975; // B value of termistor 
var delay = 3*1000; // delay between reads/display

console.log('ARTIK Thermometer');
console.log('MRAA Version: ' + mraa.getVersion()); //write the mraa version to the console

var PROTOCOL = 'mqtts';
var BROKER ='api.artik.cloud';
var PORT = 8883;

//Create the url string
var URL = PROTOCOL + '://' + BROKER;
URL += ':' + PORT;

var requireds = { username: ID, password: TOKEN };
var mqttConfig = { 'url': URL, 'requireds': requireds };

var client = mqtt.connect(mqttConfig.url, mqttConfig.requireds);
var TOPIC = '/v1.1/messages/'+ID;

client.on('connect', function () { // Connect MQTT to ARTIK
    console.log('ARTIK connected');
    setInterval(function () { 
        console.log('Published ' + '{"Temperature":'+display_temp+'}');
        client.publish(TOPIC, '{"Temperature":'+display_temp+'}');    
    }, 10*1000);//Keeps publishing every 10000 milliseconds.    
});

read(); // start the loop

function read() {
    // read the temperature sensor, converts to celsius/fahrenheit.
    var tempSensor = analogPin0.read(); //read the value of the analog pin
    var resistance = (1023 - tempSensor) * 10000 / tempSensor; //get the resistance of the sensor;
    var celsius_temperature = 1 / (Math.log(resistance / 10000) / B + 1 / 298.15) - 273.15; //convert to temperature;
    var fahrenheit_temperature = (celsius_temperature * (9 / 5)) + 32;
    display_temp = celsius_temperature;   // Change this to celsius temperature
    }

Credits

George Kartsonas

George Kartsonas

19 projects • 46 followers

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