const int temperaturePin = A0;
const int buzzerPin = 9;
const int ledPin = 10;

void setup() {
  // Initialize serial communication
  Serial.begin(9600);
  
  // Set pin modes
  pinMode(temperaturePin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Read analog value from temperature sensor
  int analogValue = analogRead(temperaturePin);
  
  // Calculate temperature in Celsius
  float temperatureC = 1 / (log(1 / (1023.0 / analogValue - 1)) / 3950 + 1.0 / 298.15) - 273.15;

  // Print temperature to serial monitor
  Serial.print("Temperature: ");
  Serial.print(temperatureC);
  Serial.println("°C");

  // Activate the buzzer if temperature is greater than or equal to 38°C
  if (temperatureC >= 38) {
    tone(buzzerPin, 1000);
  } else {
    noTone(buzzerPin);
  }

  // Map analog value to LED brightness
  int ledBrightness = map(analogValue, 953, 115, 0, 255);
  
  // Set LED brightness based on temperature
  analogWrite(ledPin, ledBrightness);

  // Delay for one second before looping again
  delay(1000);
}