hoje

#include <LiquidCrystal.h>

int val;
int tempPin = 15;
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup() {
 // lcd.begin(16, 2);
  //lcd.setCursor(0,0);
  Serial.begin(9600);
}
void loop()
{
  val = analogRead(tempPin);
  float cel = val * 0.48828125;
  float farh = (cel*9)/5 + 32;

  /*lcd.print("gang = ");
  lcd.print(cel);
  lcd.print("*C");
  delay(300);
  lcd.clear();*/
  Serial.print("temperatura: ");
  Serial.print(cel);
  Serial.println(" º");
  delay(500);

if(cel>30){
   analogWrite(13, 240);
   digitalWrite(22, 0);
   digitalWrite(23, 1);
}
else{
   analogWrite(13, 0);
   digitalWrite(22, 1);
   digitalWrite(23, 1);
}

/* uncomment this to get temperature in farenhite
Serial.print("TEMPRATURE = ");
Serial.print(farh);
Serial.print("*F");
Serial.println();


*/
}