Photoresistor and buzzer usage demo

Light_and_buzzer.ino

#define BUZZER D6
#define LIGHTD D11

void setup() {
  Serial.begin(115200);
  Serial.println("setup");
  
  pinMode(BUZZER, OUTPUT);
  digitalWrite(BUZZER, HIGH);

  pinMode(LIGHTD, INPUT);
}

void loop() {
  if (digitalRead(LIGHTD)) {
    buzzer_Di();
  }
  else {
    buzzer_off();
  }
}

void buzzer_Di() {
  Serial.println("Bi..ON");
  digitalWrite(BUZZER, LOW);
  delay(300);
 }

 void buzzer_off() {
  Serial.println("Bi..OFF");
  digitalWrite(BUZZER, HIGH);
  delay(300);
 }