const char pinAdc1 = 26, pin_led = 5;
int check_intevals = 5000, indicator_intervals = 1000;
unsigned long check_prev_millis, indicator_prev_millis;
bool first_run = true;

void read_adc_and_set_pwm_val(const int num_of_sample, const char adc_pin, const char led_pin){
  int pwm_data[num_of_sample];
  for (int i = 0; i < num_of_sample; i++) {
    int read_sensor = analogRead(pinAdc1);
    pwm_data[i] = read_sensor;
    float voltage = (static_cast<float>(read_sensor) / 4095) * 3.3;
    Serial.print("Data ke-");
    Serial.print(i+1);
    Serial.print(" --- Analog : ");
    Serial.print(read_sensor);
    Serial.print(" --- Tegangan : ");
    Serial.print(voltage);
    Serial.println(" V");
  }
  Serial.println("----------------------------------------------------");
  float sum_array;
  for (int i = 0; i < num_of_sample; i++) {
    sum_array += pwm_data[i];
  }
  float rata_rata_D = sum_array / num_of_sample;
  float rata_rata_V = rata_rata_D / 4095 * 3.3;
  int set_pwm_led = rata_rata_D/4095*255;
  float persentase_led = (float)set_pwm_led/255*100;
  Serial.print("Rata-rata --- Analog : ");
  Serial.print(rata_rata_D);
  Serial.print(" --- Tegangan :  ");
  Serial.print(rata_rata_V);
  Serial.println(" V");
  Serial.print("Set Kecerahan LED : ");
  Serial.print(set_pwm_led);Serial.print("/255");
  Serial.print(" --- ");
  Serial.print(persentase_led);
  Serial.print("%");
  analogWrite(pin_led, set_pwm_led);
  Serial.println("");
}

void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(pinAdc1, INPUT);
  pinMode(pin_led, OUTPUT);
  pinMode(LED_BUILTIN, OUTPUT);

}

void loop() {
  if(millis() - check_prev_millis >= check_intevals || check_prev_millis > millis() || first_run == true){
    check_prev_millis = millis();
    read_adc_and_set_pwm_val(100 /*num of sample taken*/, pinAdc1, pin_led);
  }
  if(millis() - indicator_prev_millis >= indicator_intervals || indicator_prev_millis > millis() || first_run == true){
    indicator_prev_millis = millis();
    digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
  }
  first_run = false;
  delay(10);//speeds up the simulation
}