int SENT = A0;
int RED = 2;
int BLUE = 4;
const float BETA = 3950;
void setup() {
  // put your setup code here, to run once:
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
 int ValueS = analogRead(SENT);
 float celsius = 1 / (log(1 / (1023. / ValueS - 1)) / BETA + 1.0 / 298.15) - 273.15;
 Serial.print(celsius);
 Serial.println("Cº");
 if(celsius > 25){
    digitalWrite(2 , HIGH);
    digitalWrite(4 , LOW);
 }else if(celsius < 16){
    digitalWrite(2 , LOW);
    digitalWrite(4 , HIGH);
  }else{
    digitalWrite(2 , LOW);
    digitalWrite(4 , LOW);
  }
 
}