int ledRed = 11;
int ledYellow = 12;
int ledGreen = 13;
int temperature = A3;
const float BETA = 3950;


void setup() {
  // put your setup code here, to run once:
  pinMode(ledRed, OUTPUT);
  pinMode(ledYellow, OUTPUT);
  pinMode(ledGreen, OUTPUT);

  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int analogValue = analogRead(A3);
  float celzija = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperatura: ");
  Serial.print(celzija);
  Serial.println("°C");
  delay(700);

  if (celzija < 0) {
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledGreen, LOW);
    Serial.println("Cold!");
  }

  else if (celzija > 0 && celzija <= 50) {
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledGreen, LOW);
    Serial.println("Cool");
  }

  else if (celzija > 50) {
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledGreen, HIGH);
    Serial.println("Hot!");
  }

  else {
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledGreen, LOW);
    Serial.println("Error...");
  }
}