const int lm35 = A0;
const int led = 13;
void setup() {
  pinMode(led, OUTPUT);
  Serial.begin(115200);
}
void loop() {
 int analogValor =analogRead(lm35);
 float voltage = analogValor * (5.0 / 1023.0);
 float temperaturaC =voltage * 100.0;
 Serial.print("temperatura: ");
 Serial.print(temperaturaC);
 Serial.println(" C");
if (temperaturaC > 28) {
  digitalWrite(led, HIGH);
}else{ 
  digitalWrite(led, LOW);
}
delay(1000);
}