#define LED_PIN 2
#define POT_PIN 12

char keterangan[50];
int potValue = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
  // range potValue = 0-4095 (12 bit)
  // range brightness = 0-255(8 bit)
  potValue = analogRead(POT_PIN);
  int brightness = map(potValue, 0, 4095, 0, 255);
  analogWrite(LED_PIN, brightness);
  sprintf(keterangan, "Tingkat kecerahan lampu = %d", brightness);
  Serial.println(keterangan);
}