..

HMI/TestProject/Test_ACS/MainForm.cs

@@ -358,7 +358,7 @@ namespace Test_ACS
         {
             // LiftControl: data = TargetID(2 hex) + LiftCommand(1 byte)
             var targetID = selectedAGV.ToString("X2");
-            var dataStr = targetID + liftCmd.ToString("X2");
+            var dataStr = targetID + ((byte)liftCmd).ToString("X2");
             SendCommand(AGVCommandHE.LiftControl, dataStr);
         }