const float BETA = 3950;

void setup() {
  // put your setup code here, to run once:
Serial.begin (9600);
pinMode (A0, INPUT);
pinMode (13, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int analogValue = analogRead (A0);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print ("Suhu = ");
  Serial.println (celsius);
  if (celsius >= 40){
    tone (13,1000,1000);
    delay (1000);
    tone (13, 500, 1000);
    delay (1000);
  }

}