def play_negado(self):
# Inicia buzzer
#GPIO.setup(self.gpio, GPIO.OUT)
buzz = PWM(self.porta, 131) # initial frequency.
buzz.start(50) # Start buzzer pin with 50% duty ration
time.sleep(0.2) # delay a note for beat * 0.5s
buzz.ChangeFrequency(101) # Change the frequency along the song note
time.sleep(0.7) # delay a note for beat * 0.5s
buzz.stop() # Stop the buzzer
super().ligar_porta() # Set buzzer pin to High
