串口通讯，用于3561型号的电压内阻测试仪，命令格式：内阻,电压 如：1.3233e-03,2.3233e+00。每次上传数据前都要先发送比如9.9999e-03,2.3233e+00 类似的9.9999开头的命令。要求安装Office。(Serial communication, used for model 3561 voltage internal resistance tester, command format: internal resistance, voltage Such