const int ldrPin = 36;
const int relayPin = 23;

int ldrValue = 0;
int threshold = 500;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(ldrPin, INPUT);
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, LOW);
}

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

  if (ldrValue < threshold) {
    digitalWrite(relayPin, HIGH);
  } else {
    digitalWrite(relayPin, LOW);
  }
  delay(500);
}