const int ledPin = D1; // NodeMCU D1 pin (GPIO 5) or any digital pin
const int ldrPin = A0; // NodeMCU A0 pin or appropriate ESP32 analog pin

// Adjust the threshold value as needed for your environment
int threshold = 500; 

void setup() {
  Serial.begin(9600); // Initialize serial communication for debugging
  pinMode(ledPin, OUTPUT); // Set LED pin as output
  pinMode(ldrPin, INPUT); // Set LDR pin as input
}

void loop() {
  int ldrValue = analogRead(ldrPin); // Read the value from the LDR

  Serial.print("LDR Value: ");
  Serial.println(ldrValue); // Print the LDR value to the Serial Monitor

  // If the light level is below the threshold, turn on the LED (it's dark)
  if (ldrValue < threshold) {
    digitalWrite(ledPin, HIGH);
    Serial.println("-> DARK, LED is ON");
  } else {
    // If the light level is above the threshold, turn off the LED
    digitalWrite(ledPin, LOW);
    Serial.println("-> LIGHT, LED is OFF");
  }
  
  delay(500); // Small delay for stability
}