vincent wong
Published © GPL3+

Temperature Monitoring with Intel Edison and ARTIK Cloud

Setup an Edison board to read temperature data and send those readings to ARTIK Cloud for monitoring.

IntermediateFull instructions provided911
Temperature Monitoring with Intel Edison and ARTIK Cloud

Things used in this project

Story

Read more

Code

main.js

JavaScript
/*jslint node:true,vars:true,bitwise:true,unparam:true */

/*jshint unused:true */

/*
The Local Temperature Node.js sample application distributed within Intel® XDK IoT Edition under the IoT with Node.js Projects project creation option showcases how to read analog data from a Grover Starter Kit Plus – IoT Intel® Edition Temperature Sensor, start a web server and communicate wirelessly using WebSockets.

MRAA - Low Level Skeleton Library for Communication on GNU/Linux platforms
Library in C/C++ to interface with Galileo & other Intel platforms, in a structured and sane API with port nanmes/numbering that match boards & with bindings to javascript & python.

Steps for installing MRAA & UPM Library on Intel IoT Platform with IoTDevKit Linux* image
Using a ssh client: 
1. echo "src maa-upm http://iotdk.intel.com/repos/1.1/intelgalactic" > /etc/opkg/intel-iotdk.conf
2. opkg update
3. opkg upgrade

Article: https://software.intel.com/en-us/html5/articles/iot-local-temperature-nodejs-and-html5-samples
*/

var webSocketUrl = "wss://api.artik.cloud/v1.1/websocket?ack=true";
var device_id = "your_device_id";
var device_token = "your_device_token";

var isWebSocketReady = false;
var ws = null;

var WebSocket = require('ws');

/**
 * Gets the current time in millis
 */
function getTimeMillis(){
    return parseInt(Date.now().toString());
}


/**
 * Create a /websocket device channel connection 
 */
function start() {
    //Create the websocket connection
    isWebSocketReady = false;
    ws = new WebSocket(webSocketUrl);
    ws.on('open', function() {
        console.log("Websocket connection is open ....");
        register();
    });
    ws.on('message', function(data, flags) {
        console.log("Received message: " + data + '\n');
    });
    ws.on('close', function() {
        console.log("Websocket connection is closed ....");
    });
}

/**
 * Sends a register message to the websocket and starts the message flooder
 */
function register(){
    console.log("Registering device on the websocket connection");
    try{
        var registerMessage = '{"type":"register", "sdid":"'+device_id+'", "Authorization":"bearer '+device_token+'", "cid":"'+getTimeMillis()+'"}';
        console.log('Sending register message ' + registerMessage + '\n');
        ws.send(registerMessage, {mask: true});
        isWebSocketReady = true;
    }
    catch (e) {
        console.error('Failed to register messages. Error in registering message: ' + e.toString());
    }   
}

/**
 * Send one message to ARTIK Cloud
 */
function sendData(temp){
    try{
        ts = ', "ts": '+getTimeMillis();
        var data = {
            "currentTemp": temp
        };
        var payload = '{"sdid":"'+device_id+'"'+ts+', "data": '+JSON.stringify(data)+', "cid":"'+getTimeMillis()+'"}';
        console.log('Sending payload ' + payload);
        ws.send(payload, {mask: true});
    } catch (e) {
        console.error('Error in sending a message: ' + e.toString());
    }   
}


var B = 3975;
var mraa = require("mraa");

//GROVE Kit A0 Connector --> Aio(0)
var myAnalogPin = new mraa.Aio(0);

/*
Function: startSensorWatch(socket)
Parameters: socket - client communication channel
Description: Read Temperature Sensor and send temperature in degrees of Fahrenheit every 4 seconds
*/
function startSensorWatch(socket) {
    'use strict';
    setInterval(function () {
        var a = myAnalogPin.read();
        console.log("Analog Pin (A0) Output: " + a);
        //console.log("Checking....");
        
        var resistance = (1023 - a) * 10000 / a; //get the resistance of the sensor;
        //console.log("Resistance: "+resistance);
        var celsius_temperature = 1 / (Math.log(resistance / 10000) / B + 1 / 298.15) - 273.15;//convert to temperature via datasheet ;
        //console.log("Celsius Temperature "+celsius_temperature); 
        var fahrenheit_temperature = (celsius_temperature * (9 / 5)) + 32;
        console.log("Fahrenheit Temperature: " + fahrenheit_temperature);
        socket.emit("message", fahrenheit_temperature);
        
        sendData(fahrenheit_temperature);
        
    }, 15000);
}

console.log("Sample Reading Grove Kit Temperature Sensor");

//Create Socket.io server
var http = require('http');
var app = http.createServer(function (req, res) {
    'use strict';
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('<h1>Hello world from Intel IoT platform!</h1>');
}).listen(1337);
var io = require('socket.io')(app);

start();

//Attach a 'connection' event handler to the server
io.on('connection', function (socket) {
    'use strict';
    console.log('a user connected');
    //Emits an event along with a message
    socket.emit('connected', 'Welcome');

    //Start watching Sensors connected to Galileo board
    startSensorWatch(socket);

    //Attach a 'disconnect' event handler to the socket
    socket.on('disconnect', function () {
        console.log('user disconnected');
    });
});

package.json

JSON
{
  "name": "LocalTemperature",
  "description": "",
  "version": "0.0.0",
  "main": "main.js",
  "engines": {
    "node": ">=0.10.0"
  },
  "dependencies": {
      "socket.io":"latest",
      "ws":"latest"
  }
}

Credits

vincent wong

vincent wong

7 projects • 173 followers

Comments

Add projectSign up / Login