const float BETA = 3950; // should match the Beta Coefficient of the thermistor

void setup() {
  Serial.begin(9600);
  pinMode(2, OUTPUT);
  pinMode(8, OUTPUT);
}

void loop() {
  int analogValue = analogRead(A0);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperatura: ");
  Serial.print(celsius);
  Serial.println(" ℃");
  if (celsius >=30)
  {
    digitalWrite(2, HIGH);
    tone(8,10000,1000);
  }
  else
  {
    digitalWrite(2, LOW);
    noTone(8);

  }
  delay(1000);

}