串口文件，COM口，支持文件的传送及文字传送，为源代码，学习意义较高-serial document, COM I support the transmission of documents and text transmission to the source code, meaning higher learning

U盘文件读写模块, 连接方式: 3线制串口+查询+事件中断通知-U disk document literacy module, Connectors : 3-wire serial inquiries termination notice

vb实现串口通信 文件传送系统，用vb以及mscomm控件实现