3 . implementing the serial communication between the cms and lms . putting forward two rules for software flow control and data transmission, as well as implementing the relevant design for command frame, return frame and data frame of them (3)解决了cms与lms之间的串口无线通信问题,提出了一种软件流量控制规程与数据传输规程,并设计了相应的命令帧、回应帧及数据帧的结构。