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);
}