Environment monitor with AWS IoT

var awsIot = require('aws-iot-device-sdk'); //require for aws iot 
var mraa = require('mraa'); //require mraa for analog/digital read/write
console.log('MRAA Version: ' + mraa.getVersion()); //write the mraa version to the console



/*
 * CONFIGURATION VARIABLES 
 * To set your AWS credentials, export them to your environment variables.
 * Run the following from the Edison command line:
 * export AWS_ACCESS_KEY_ID='AKID'
 * export AWS_SECRET_ACCESS_KEY='SECRET'
 */

// AWS IoT Variables
var mqttPort = 8883;
var rootPath = '/home/root/awscerts/';
var awsRootCACert = "root-CA.pem.crt";
var awsClientCert = "certificate.pem.crt";
var awsClientPrivateKey = "private.pem.key";
var topicName = "Edison";
var awsClientId = "Edison";
var awsIoTHostAddr = "https://AWVI662RQY269.iot.us-west-2.amazonaws.com";



/*
 * Instance AWS variables for use in the application for
 * AWS IoT Certificates for secure connection.
 */
var privateKeyPath = rootPath + awsClientPrivateKey;
var clientCertPath = rootPath + awsClientCert;
var rootCAPath = rootPath + awsRootCACert;


/*
*Initializing Device Communication for AWS IoT
*/



var myThingName = 'Edison';

var thingShadows = awsIot.thingShadow({
     keyPath: privateKeyPath,
    certPath: clientCertPath,
    caPath: rootCAPath,
  clientId: awsClientId,
    region: 'us-west-2'
});
console.log("AWS IoT Device object initialized");


mythingstate = {
  "state": {
    "reported": {
      "ip": "unknown"
    }
  }
}

var networkInterfaces = require( 'os' ).networkInterfaces( );
mythingstate["state"]["reported"]["ip"] = networkInterfaces['wlan0'][0]['address'];

var temperaturePin = new mraa.Aio(2); //setup access analog input Analog pin #2 (A2)

var temperatureValue = temperaturePin.read(); //read the value of the analog pin
console.log(temperatureValue); //write the value of the analog pin to the console


// calculate temperature
var tmpVoltage = ((temperatureValue*5.0)/1023.0); // convert analog value to voltage
var temperature = (5.26*Math.pow(tmpVoltage,3))-(27.34*Math.pow(tmpVoltage,2))+(68.87*tmpVoltage)-17.81;
console.log(temperature);


  thingShadows.on('connect', function() {
  console.log("Connected...");
  console.log("Registering...");
  thingShadows.register( myThingName );

  // An update right away causes a timeout error, so we wait about 2 seconds
  setTimeout( function() {
    console.log("Updating my IP address...");
    clientTokenIP = thingShadows.update(myThingName, mythingstate);
    console.log("Update:" + clientTokenIP);
  }, 2500 );


  // Code below just logs messages for info/debugging
  thingShadows.on('status',
    function(thingName, stat, clientToken, stateObject) {
       console.log('received '+stat+' on '+thingName+': '+
                   JSON.stringify(stateObject));
    });

  thingShadows.on('update',
      function(thingName, stateObject) {
         console.log('received update '+' on '+thingName+': '+
                     JSON.stringify(stateObject));
      });

  thingShadows.on('delta',
      function(thingName, stateObject) {
         console.log('received delta '+' on '+thingName+': '+
                     JSON.stringify(stateObject));
      });

  thingShadows.on('timeout',
      function(thingName, clientToken) {
         console.log('received timeout for '+ clientToken)
      });

  thingShadows
    .on('close', function() {
      console.log('close');
    });
  thingShadows
    .on('reconnect', function() {
      console.log('reconnect');
    });
  thingShadows
    .on('offline', function() {
      console.log('offline');
    });
  thingShadows
    .on('error', function(error) {
      console.log('error', error);
    });
	
  
  //Watch for temperature
if(temperature > 35 ){
   thingShadows.publish('arn:aws:sns:us-west-2:316723939866:TemperaturAlarm', 
                        'Your room temperature is greater than 35deg C');
   }


});