const int ldrPin = 34;      // ESP32 analog pin for LDR
const int relayPin = 26;    // ESP32 digital pin for relay control
int threshold = 1800;       // Adjust based on your LDR & wiring (0-4095 for 12-bit ADC)

void setup() {
  Serial.begin(115200);
  pinMode(ldrPin, INPUT);
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, LOW); // Start with relay off
}

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

  // If it's dark (below threshold), turn on relay (LED glows)
  if (ldrValue < threshold) {
    digitalWrite(relayPin, HIGH);
  } else {
    digitalWrite(relayPin, LOW);
  }

  delay(500);
}