It is a beneficial document from Analog Devices explaining why rs 485 and rs 422 protocols are highly used in industry

设计并制作一个无线环境监测模拟装置，实现对周边温度和光照信息的探测。该装置由1个监测终端和不多于255个探测节点组成（实际制作2个）。监测终端和探测节点均含一套无线收发电路，要求具有无线传输数据功能，收发共用一个天线。-Design and production of a wireless environmental monitoring of analog devices, and on the surrounding temperature and light detection. The