const int temperatureSensorPin = A0;
const int fanPin = 12;
const int greenLEDPin = 11;
const int redLEDPin = 10;

void setup() {
  pinMode(temperatureSensorPin, INPUT);
  pinMode(fanPin, OUTPUT);
  pinMode(greenLEDPin, OUTPUT);
  pinMode(redLEDPin, OUTPUT);

  Serial.begin(9600);
  digitalWrite(greenLEDPin, HIGH);
  digitalWrite(redLEDPin, LOW);
  analogWrite(fanPin, 0);
}

void loop() {
  int temperature = analogRead(temperatureSensorPin);
  float temperatureVoltage = (temperature / 1023.0) * 1.5;
  float temperatureCelsius = temperatureVoltage * 100.0;
  
  Serial.print("Temperature: ");
  Serial.print(temperatureCelsius);
  Serial.print("°C | Fan PWM: ");
  
  if (temperatureCelsius > 100) {
    Serial.println("100%");
    analogWrite(fanPin, 255);
    blinkRedLED();
  } else if (temperatureCelsius <= 100 && temperatureCelsius > 30) {
    Serial.println("50%");
    analogWrite(fanPin, 128);
    digitalWrite(redLEDPin, HIGH);
    digitalWrite(greenLEDPin, LOW);
  } else {
    Serial.println("0%");
    analogWrite(fanPin, 0);
    digitalWrite(greenLEDPin, HIGH);
    digitalWrite(redLEDPin, LOW);
  }
  
  delay(1000);
}

void blinkRedLED() {
  for (int i = 0; i < 5; i++) {
    digitalWrite(redLEDPin, HIGH);
    delay(500);
    digitalWrite(redLEDPin, LOW);
    delay(500);
  }
}