diff --git a/WebStarter/Controllers/TBoxController.cs b/WebStarter/Controllers/TBoxController.cs
index e4fecdd..c5b2f1d 100644
--- a/WebStarter/Controllers/TBoxController.cs
+++ b/WebStarter/Controllers/TBoxController.cs
@@ -26,7 +26,7 @@ public class TBoxController : ControllerBase
     {
         Log.Info($"Connect {carNo}");
         TBoxServerMgr.Server.StartSendVin(carNo);
-        return TBoxServerMgr.Server != null && TBoxServerMgr.Server.Connected;
+        return TBoxServerMgr.Server != null && TBoxServerMgr.Server.BatteryNo()!=null;
     }
 
     /// <summary>