int led = 22;
int pulsador = 35;
int val;

void setup(){
  pinMode(led, OUTPUT);
  pinMode(pulsador, INPUT_PULLUP);
  Serial.begin(115200); 
  delay(1000);
  Serial.println("INICIO");
}

void loop(){
  val = digitalRead(pulsador);
  if(val ==   LOW){
    digitalWrite(led, LOW);
  }
  else{
    digitalWrite(led, HIGH);
  }
}