ViewModels/D7896ViewModel.cs

@@ -109,7 +109,7 @@ public partial class D7896ViewModel : ObservableObject
         // TH1963 IP 地址需要根据实际配置修改，建议从配置文件读取
         _th1963Ustd = new Th1963LanService();
         // 5位半万用表串口名，例如 "COM3"
-        _fiveHalfUpt = new FiveHalfDmmService("COM3", 115200);
+        _fiveHalfUpt = new FiveHalfDmmService("COM6", 115200);
 
         StartBackgroundMonitoring();
     }