void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Led acionado por Botão, ESP32!");
  pinMode(4, INPUT_PULLUP);
  pinMode(2, OUTPUT);
}

void loop() {
  int x = digitalRead(4);
  Serial.println(x);
  if (x == 0){
    digitalWrite(2, HIGH);
  }
  else (digitalWrite(2, LOW));
  // put your main code here, to run repeatedly:
  delay(100); // this speeds up the simulation
}