#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,10,13);

const int sens=A0;
float RT, VR, ln, TX, T0, VRT;
int VCC=5;
int RTO=10000;
int B=3977;
int R=10000;

void setup() {
  // put your setup code here, to run once:
  lcd.begin(16,2);  //imposta il numero di colonne e righe
  analogReference(EXTERNAL); //il pin aref è collegato alla tensione di riferimento di 3,3v
  T0 = 25 + 273.15;
}

void loop() {
  // put your main code here, to run repeatedly:


  VRT = analogRead(A0);              //Acquisition analog value of VRT
  VRT = (5.00 / 1023.00) * VRT;      //Conversion to voltage
  VR = VCC - VRT;
  RT = VRT / (VR / R);               //Resistance of RT

  ln = log(RT / RTO);
  TX = (1 / ((ln / B) + (1 / T0))); //Temperature from thermistor

  TX = TX - 273.15;                 //Conversion to Celsius


  lcd.setCursor(0,0);
  lcd.print("temperatura in Celsius: ");
  lcd.setCursor(0,1);
  lcd.print(TX);
}