Send the packet pk though the link

def send_packet(self, pk):
        """ Send the packet pk though the link """
        # if self.out_queue.full():
        #    self.out_queue.get()
        if (self.cfusb is None):
            return

        try:
            dataOut = (pk.header,)
            dataOut += pk.datat
            self.cfusb.send_packet(dataOut)
        except queue.Full:
            if self.link_error_callback:
                self.link_error_callback(
                    'UsbDriver: Could not send packet to Crazyflie')