#define led 2
#define pot 13
int i;

void setup() {
  pinMode(led, OUTPUT);
  Serial.begin(115200);
  Serial.println("pipipipopopo");
}

void loop() {
 int potvalor = analogRead(pot);
 float potenciometro = map(potvalor, 0 , 4095, 0, 255);

  analogWrite(led, potenciometro);
  delay(20);
}