void display_text(String text){
  //Serial.println("Display:");
  //Serial.println(text);
  ledMatrix.clear();
  ledMatrix.setText(text);
  ledMatrix.drawText();
  ledMatrix.commit();
}


void setBrightnes(int h){
  if (h > 20 || h < 7){
    ledMatrix.setIntensity(0);
  }
  else{
    ledMatrix.setIntensity(4);
  }
}

void delay_gui(unsigned long millis_s){
  block_gui =  millis() + millis_s;
}

void release_gui(unsigned long currentMillis){
  if (block_gui < currentMillis)
    block_gui = -1;
  else
    return;
}