int ldrPin = A0;      
int WHITE_LED = 3;      
int Buzzer = 9;   
int ldrValue = 0;    

void setup() {
  Serial.begin(9600);
  pinMode(ldrPin, INPUT);
  pinMode(WHITE_LED, OUTPUT);
  pinMode(Buzzer, OUTPUT);
}

void loop() {
  ldrValue = analogRead(ldrPin); 
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  // Case 1: 70 - 150 → Nalka waa full brightness kiisa, tone kane waa 550
  
  if (ldrValue >= 70 && ldrValue <= 150) {
    analogWrite(WHITE_LED, 255); 
    tone(Buzzer, 550);        
    Serial.println("Full Brightness | Tone 550 Hz");
  }

  // Case 2: 160 - 400 → Nalka waa Normal, tone kane waa 660
  
  else if (ldrValue >= 160 && ldrValue <= 400) {
    analogWrite(WHITE_LED, 150);     
    tone(Buzzer, 660);        
    Serial.println("Normal Brightness | Tone 660 Hz");
  }

  // Case 3: 410 - 550 → Nalka sa'id buu daciif uyahay, tone kane waa 770
  
  else if (ldrValue >= 410 && ldrValue <= 550) {
    analogWrite(WHITE_LED, 80);     
    tone(Buzzer, 770);         
    Serial.println("Low Brightness | Tone 770 Hz");
  }

  // hadii kale → wada dami Nalka iyo Buzzer ka
  else {
    analogWrite(WHITE_LED, 0);
    noTone(Buzzer);
    Serial.println("No Light Detected | LED OFF");
  }

  delay(500);
}