def METHOD_NAME(self) -> bool:
    if self.hci is not None:
        devinfo = device_info(self.hci)
        _tx = devinfo["stat"]["byte_tx"]
        _rx = devinfo["stat"]["byte_rx"]
        tx, s_tx = format_bytes(_tx)
        rx, s_rx = format_bytes(_rx)
        _u_speed = self.up_speed.calc(_tx)
        _d_speed = self.down_speed.calc(_rx)
        self.set_blinker_by_speed(self.up_blinker, _u_speed)
        self.set_blinker_by_speed(self.down_blinker, _d_speed)
        u_speed, s_u_speed = format_bytes(_u_speed)
        d_speed, s_d_speed = format_bytes(_d_speed)
        self.set_data(tx, s_tx, rx, s_rx, u_speed, s_u_speed, d_speed, s_d_speed)
    return True