简单的串口调试程序 向串口发送数据并从串口读取数据 可以用来查看串口的连通性 -Simple serial debugger to send data to the serial port and read data from the serial port can be used to view the serial port connectivity

串口测试助手，一个小软件，可以直接使用测试串口的连通性-Serial testing assistant, a small software, you can directly use the test port connectivity