#define DARK HIGH
#define LIGHT LOW


const int  RELAY_PIN = 15;
const int LDR_PIN = 16;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(LDR_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);
  // Serial.println("Hello, ESP32!");
}

void loop() {
  // put your main code here, to run repeatedly:
  int lightState = digitalRead(LDR_PIN);
  if (lightState == DARK) {
    digitalWrite(RELAY_PIN , HIGH);
  } else {
    digitalWrite(RELAY_PIN , LOW);

  }
  delay(100); // this speeds up the simulation
}