#define LDR_PIN 36
#define LED_PIN 22
#define BUZZER 18


void setup() {
  Serial.begin(9600);
  pinMode(LDR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER, OUTPUT);
}

void loop() {
  int ldr_val = analogRead(LDR_PIN);
  int light_percentage = map(ldr_val, 0, 4063, 100, 0);

  Serial.print("LDR Analog value: ");
  Serial.println(ldr_val);
  Serial.print("Light Percentage: ");
  Serial.print(light_percentage);
  Serial.println("%");

  if (light_percentage < 50) {
    digitalWrite(LED_PIN, HIGH);
    tone(BUZZER, 500);
    delay(1000);
    tone(BUZZER, 0);
    delay(200);
  }
  else if (light_percentage >= 50) {
    digitalWrite(LED_PIN, LOW);
    tone(BUZZER, 0);
  }
  delay(1000);
}