Intel Edison Temperature Logger With RBG-LCD

main.js

// Load Grove module
var groveSensor = require('jsupm_grove');
var FormData = require('form-data');
var fs = require('fs');
// we want mraa to be at least version 0.6.1
var mraa = require('mraa');
var version = mraa.getVersion();

var tSampFileName='t_samp.csv';
var filrUpldDstnUrl = "http://192.168.1.101:8099/fileupld/";

if (version >= 'v0.6.1') {
 console.log('mraa version (' + version + ') ok');
 startApp();
}
else {
 console.log('meaa version(' + version + ') is old - this code may not work');
}


/**
 * Refresh the data periodically 
 * 
 */
function showData(display) {
 setInterval(function() {
 var red = 0;
 var green = 0;
 var blue =0;     
 var t=getTemperature();
     if(t<24){
         blue=250;
     }
     else if(t<27){
         green=250;
     }
     else{
         red=250;
     }
 display.setColor(red, green, blue);
 display.clear();
 display.setCursor(0,0);
 display.write('Temperature:' + t+ 'C');
 var ts=Date.now();
 var smp= t +","+ts+"\n";
 console.log(smp);     
 addToFile(smp);     
 }, 5000);
}

var temp=new groveSensor.GroveTemp(0);
function getTemperature(){
 var data=temp.value();
 return data;
 //return (data*500)/1024;
}

function startApp() {
 var lcd = require('jsupm_i2clcd');
 var display = new lcd.Jhd1313m1(0, 0x3E, 0x62);
 showData(display);
 startSensorWatch();
}

function addToFile(data){
    fs.appendFile(tSampFileName, data, function (err) {
     if (err) throw err;
        //console.log('data added to the file');
     });
}


function startSensorWatch() {

    var touch_sensor_value = 0, last_t_sensor_value;

    //Touch Sensor connected to D2 connector
    var digital_pin_D2 = new mraa.Gpio(2);
    digital_pin_D2.dir(mraa.DIR_IN);

    setInterval(function () {
        touch_sensor_value = digital_pin_D2.read();
        if (touch_sensor_value === 1 && last_t_sensor_value === 0) {
            //move the data file to a new file and load it to the server,then remove the file
            var newFileName="t_smp"+Date.now()+".csv";
            fs.rename(tSampFileName,newFileName,function(err){
                if(err){
                    console.log(err);
                }
                else{
                    var form = new FormData();
                    form.append('userFile', fs.createReadStream(newFileName));
                    form.submit(filrUpldDstnUrl, function(err, res) {
                        if(err){
                            console.log('could not upload the file');
                        }
                        res.resume();
                        console.log('file upld res:' ,res.statusCode);
                        fs.unlink(newFileName,function(){
                            console.log("file has been removed "+newFileName);
                        });
                    });
                }
            });
        } else if (touch_sensor_value === 0 && last_t_sensor_value === 1) {
            
        }
        last_t_sensor_value = touch_sensor_value;
    }, 300);
}