void setup() {
  pinMode(8, OUTPUT); // Pin '0' OUTPUT 
  Serial.begin(115200); //Serial comm speed
  Serial.println("Give command (1 = On, 0 = Off )");
}

void loop() {
  if (Serial.available() > 0) {
    char komento = Serial.read();

    if (komento == '1') {
      digitalWrite(8, HIGH); // Led on
    }
    if (komento == '0') {
      digitalWrite(8, LOW); // Off
    }
    
  }
}