float vref = 3.3;
float resolution = vref / 1023.0;

void setup() {
  Serial.begin(115200);
  pinMode(4, OUTPUT);
}

void loop() {
  float sensorValue = analogRead(35);
  float voltage = sensorValue * resolution;
  float temperturec = voltage * 100;
  Serial.println(temperturec);
  if (temperturec > 28) {
    digitalWrite(4, HIGH);
  }
  else{
    digitalWrite(4, LOW);
  }
  delay(1000);
}