code: def start(self, blocking=False):
          
          self.debug("()")
          # Init GPIO
          # Enable warnings
          GPIO.setwarnings(True)
          # Careful - numbering between different pi version might differ
          if self.gpio_mode == "BOARD":
              GPIO.setmode(GPIO.BOARD)
          else:
              GPIO.setmode(GPIO.BCM)
  
          # Register people
          try:
              self.changer.on_person_new(self.people)
          except:
              self.exception("Failed to add people to audience")
              raise StartException("Adding people failed")
  
          # Setup pins
          for gpio in self.gpios:
              GPIO.setup(gpio, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
              GPIO.add_event_detect(
                  gpio, GPIO.BOTH,
                  callback=self._gpio_callback, bouncetime=self.gpio_bouncetime
              )
          super(GPIODetector, self).start(blocking)
docs: Start the interface
  
          :param blocking: Should the call block until stop() is called
              (default: False)
          :type blocking: bool
          :rtype: None