然而，它们在客户机对服务器通信方面都存在严重的缺陷，特别是当客户机遍布因特网时。

However, both they have severe weaknesses for client-to-server communications, especially when the client machines are scattered across the Internet.

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它也被称为机对机通信，是指提供其周围环境和活动相关信息的普通非手机对象之间在互联网上进行的通信。

It is also called Machine to Machine communication and refers to communication through the Internet between non-phone, ordinary objects providing information about their surroundings and activities.

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该方法利用单片机控制蓝牙模块，采用基于HCI层的单片机对蓝牙模块控制的方法及PC机端通过RS232接口连接蓝牙模块互相配合，实现PC机与能动磨盘之间的通信。

The method carries out the wireless communication between the PC and active lap, by the conjugation of bluetooth module controlled by MCU via HCI and bluetooth module connected with PC via RS232.

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