#define LDR_PIN 34
#define BUZZER_PIN 14
#define LED_PIN 26
const int threshold = 2000; 

void setup() {
  pinMode(LDR_PIN, INPUT);  
  pinMode(BUZZER_PIN, OUTPUT); 
  pinMode(LED_PIN, OUTPUT); 
  Serial.begin(115200);
}

void loop() {
  int ldrValue = analogRead(LDR_PIN); 
  Serial.println(ldrValue); 
 
  if (ldrValue < threshold) { 
     tone(BUZZER_PIN, 262, 250);
     digitalWrite(LED_PIN, HIGH);    
  } else {
    noTone(BUZZER_PIN); 
    digitalWrite(LED_PIN, LOW);     
  }

  delay(10); 
}