文章以总线型多点数据采集系统为例，介绍了用RS - 4 85构成主从机方式通信网络的一般组网方法。
The data collecting system of bus mode as an example is introduced and general methods of constructing communicating networks of principal and subordinate mode by RS-485 are given.
利用PC机作为主控计算机，采用RS485网络系统对生产中的配料系统进行多点数据采集，并对整个配料生产过程进行监控和控制。
This paper describes a multipoint data sampling system for the manufacturing material-mixing system, which uses RS485 network system and PC as a master control computer.
第三章介绍了蓝牙串口替代模型和单芯片嵌入式CSR蓝牙开发平台，并给出基于串口替代模型的蓝牙点对点与点对多点数据传输模块的开发和应用。
Thirdly, the bluetooth SPP profile and CSR bluetooth One-Processor architecture system are discussed. The application and development of bluetooth data transfer module is also given.
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