Telegram Bot with Intel Edison

var i2c = require('./i2c');
var display = new i2c.LCD(0);
var Bot = require('node-telegram-bot');
var m = require('mraa'); //require mraa
console.log('MRAA Version: ' + m.getVersion()); //write the mraa version to the console
var analogPin0 = new m.Aio(0); //setup access analog inpuput pin 0
var analogPin1 = new m.Aio(1);
var led = new m.Gpio(2); 
led.dir(m.DIR_OUT); //set the gpio direction to output
var bot = new Bot({
  token: 'setyourtokenhere'
});


bot.on('message', function (message) {
  parseMessage(message);
});


bot.start();
console.log("BOT ready!");
useLcd();


// Functions that handles a new message
function parseMessage(message) {

  //if(!isAuthorized(message.from.id)) return;

  switch(true) {

    case message.text == "/gettemp":
      var a = analogPin0.read();
      var resistance = (1023 - a) * 10000 / a; 
      var celTemp = 1 / (Math.log(resistance / 10000) / 3975 + 1 / 298.15) - 273.15;
          bot.sendMessage({
        chat_id: message.chat.id,
        text: 'The temperature is ' + celTemp.toFixed(2) + '°C',
      });
      break;

    case message.text == "/getlight":
     var c = analogPin1.read();
       if(c <250)
          {
             led.write(1);
          bot.sendMessage({
        chat_id: message.chat.id,
        text: 'I turn on the light',
       });
          }
        else { 
         led.write(0);
            bot.sendMessage({
        chat_id: message.chat.id,
        text: 'I turn off the light',
            });      }
      break;

      case message.text == "/getlcd":
          display.setColor(0, 168 , 255);
        display.setCursor(0,0);
        display.write('Hello there');
        display.setCursor(1,0);
        display.write('A message from telegram');          
          bot.sendMessage({
        chat_id: message.chat.id,
        text: 'LCD prendida ',
      });
      break;     
       
  }
}

function isAuthorized(userid) {

  for(i = 0; i < authorized_users.length; i++)
    if(authorized_users[i ] == userid) return true;

  return false;
}

function useLcd() {
    

    display.setColor(0, 0, 255);
    display.setCursor(0, 0);
    display.write('Welcome');
    display.setCursor(1,0);  
    display.write('Home');
    display.waitForQuiescent()
    .then(function() {
    })
    .fail(function(err) {
        console.log(err);
        display.clearError();
        rotateColors(display);
    });
}