#include <ESP32Servo.h>
#define ldrPin 2
const int servoPin = 4;
const float gama = 0.7;
const float rl10 = 50;
Servo servo;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  servo.attach(servoPin, 500, 2400);
}
int pos = 0;

void loop() {
  // put your main code here, to run repeatedly:
  delay(10);
  int nilaiLDR = analogRead(ldrPin);
  nilaiLDR = map(nilaiLDR, 4095, 0, 1024, 0); //mengubah nilai pembacaan sensor LDR dari nilai ADC arduino menjadi nilai ADC ESP32
  float voltase = nilaiLDR / 1024.*5;
  float resistansi = 2000 * voltase / (1 - voltase / 5);
  float kecerahan = pow(rl10 * 1e3 * pow(10, gama) / resistansi, (1 / gama));
  Serial.print("Kecerahan = ");
  Serial.println(kecerahan);

  if (kecerahan > 50) {
    for (pos = 0; pos <= 180; pos += 1) {
      servo.write(pos);
      delay(15);
    }
  } else {
    for (pos = 180; pos >= 90; pos -= 1) {
      servo.write(pos);
      delay(15);
    }
  }
  delay(100);
}