#define led 13
unsigned long prevT = 0;
bool state = false;


void setup() {
  Serial.begin(115200);
  pinMode(led, OUTPUT);
  digitalWrite(led, HIGH);
}

void loop() {
  if(micros() - prevT >= 80){
    if(!state){
      Serial.println("Arriba");
      //digitalWrite(led, LOW);
      state = true;
    }
    else{
      Serial.println("Abajo");
      //digitalWrite(led, HIGH);
      state = false;
    }
    prevT = millis();
  }

}