用C51编写的基于51单片机串口点对点双向通信程序，特点是具有可靠的通信失败检测及信息重发功能。-with C51 prepared by the 51 microcontroller-based point-to-point two-way serial communication program, which is characterized with reliable communication failure detection and re-issued the information

串口通信程序CeChat，实现了通过串口发送与接收信息的功能，类似于一个点对点的聊天工具-Serial Communication Program CeChat, achieved through the serial port to send and receive information function, similar to a point in the chat tool

串口计算器，可以实现加、减、乘、除、括号、sin（）、cos（）等基础运算，支持浮点数和整数，以LCD显示，有报警功能。-Serial calculator can add, subtract, multiply, divide, brackets, sin (), cos () and other basic operations, support for floating point and integer, with LCD display, alarm function.