diff --git a/uappbase/bean/appevent.hpp b/uappbase/bean/appevent.hpp
index 0f783ee..090d139 100644
--- a/uappbase/bean/appevent.hpp
+++ b/uappbase/bean/appevent.hpp
@@ -3,8 +3,10 @@
 
 #include <functional>
 
-#include "uicontroler/tjc/tjc_base_type.h"
 #include "appevent_type.hpp"
+extern "C" {
+#include "uicontroler/tjc/tjc_base_type.h"
+}
 
 /**
  *
@@ -17,13 +19,27 @@
 
 class AppEvent {
  public:
-  AppEventType_t type;
-  union val {
-    uint32_t placeholder;
-    char     bleName[20];
-    char     stateDisplayInfo[30];
-    UIEvent  uiEvent;
-    int32_t  pageChangeTo;
-  } d;
+  AppEventType_t        type;
   std::function<void()> onfnc;
+  uint8_t               buf[sizeof(UIEvent) + 10];
+
+  char* getBleName() { return (char*)buf; }
+
+  char* getStateDisplayInfo() { return (char*)buf; }
+
+  UIEvent* getUIEvent() { return (UIEvent*)buf; }
+
+  int32_t getPageChangeTo() { return *(int32_t*)buf; }
+
+  void setBleName(const char* name) { strcpy((char*)buf, name); }
+
+  void setStateDisplayInfo(const char* info) { strcpy((char*)buf, info); }
+
+  void setUIEvent(const UIEvent& event) { memcpy(buf, &event, sizeof(UIEvent)); }
+
+  void setPageChangeTo(int32_t page) { *(int32_t*)buf = page; }
+
+  void setOnFnc(std::function<void()> fnc) { onfnc = fnc; }
+
+  int getBufSize() { return sizeof(buf); }
 };
diff --git a/uappbase/bean/event.hpp b/uappbase/bean/event.hpp
index 8645843..7a7776f 100644
--- a/uappbase/bean/event.hpp
+++ b/uappbase/bean/event.hpp
@@ -7,10 +7,5 @@
 namespace iflytop {
 using namespace std;
 
-static inline AppEvent createStateDisplayInfoEvent(const char* info) {
-  AppEvent event;
-  event.type = kAppEvent_StateDisplayInfo;
-  strncpy(event.d.stateDisplayInfo, info, sizeof(event.d.stateDisplayInfo));
-  return event;
-}
+
 }  // namespace iflytop
\ No newline at end of file
diff --git a/uappbase/service/app_event_bus.cpp b/uappbase/service/app_event_bus.cpp
index 1b78f03..d48e981 100644
--- a/uappbase/service/app_event_bus.cpp
+++ b/uappbase/service/app_event_bus.cpp
@@ -4,6 +4,8 @@
 using namespace iflytop;
 using namespace std;
 static QueueHandle_t xQueue;
+static AppEvent      eventtxcache;
+
 #define TAG "AppEventBus"
 void AppEventBus::initialize() {
   lock.init();
@@ -11,20 +13,20 @@ void AppEventBus::initialize() {
   xQueue = xQueueCreate(20, sizeof(AppEvent));
 
   thread.start([this]() {
-    AppEvent event;
+    static AppEvent eventrxcache;
     while (1) {
-      if (xQueueReceive(xQueue, &event, portMAX_DELAY) == pdTRUE) {
-        // ZLOGI(TAG, "pop event type %d", event.type);
+      if (xQueueReceive(xQueue, &eventrxcache, portMAX_DELAY) == pdTRUE) {
+        // ZLOGI(TAG, "pop eventrxcache type %d", eventrxcache.type);
 
-        if (event.type == KAE_callOnAppEventBusLoop) {
-          if (event.onfnc) {
-            event.onfnc();
+        if (eventrxcache.type == KAE_callOnAppEventBusLoop) {
+          if (eventrxcache.onfnc) {
+            eventrxcache.onfnc();
           }
           continue;
         }
 
         for (int i = 0; i < cbNum; i++) {
-          m_cbs[i](&event);
+          m_cbs[i](&eventrxcache);
         }
       }
     }
@@ -41,24 +43,31 @@ void AppEventBus::pushEvent(const AppEvent& event) {
     ZLOGE(TAG, "xQueueSend failed");
   }
 }
-static AppEvent event;
 
 void AppEventBus::pushSimpleEvent(AppEventType_t type) {
   zlock_guard lck(lock);
-  event.type = type;
-  pushEvent(event);
+  eventtxcache.type = type;
+  pushEvent(eventtxcache);
 }
 
 void AppEventBus::pushPageChangeEvent(uint8_t toPage) {
   zlock_guard lck(lock);
-  event.type           = KAE_PageChangeEvent;
-  event.d.pageChangeTo = toPage;
-  pushEvent(event);
+  eventtxcache.type = KAE_PageChangeEvent;
+  eventtxcache.setPageChangeTo(toPage);
+  pushEvent(eventtxcache);
 }
 
 void AppEventBus::callFnInEventBus(function<void()> onfnc) {
   zlock_guard lck(lock);
-  event.type  = KAE_callOnAppEventBusLoop;
-  event.onfnc = onfnc;
-  pushEvent(event);
+  eventtxcache.type  = KAE_callOnAppEventBusLoop;
+  eventtxcache.onfnc = onfnc;
+  pushEvent(eventtxcache);
+}
+
+void AppEventBus::pushStateDisplayInfoEvent(const char* info) {
+  zlock_guard lck(lock);
+  eventtxcache.type = kAppEvent_StateDisplayInfo;
+  // strncpy(event.getStateDisplayInfo(), info, event.getBufSize());
+  eventtxcache.setStateDisplayInfo(info);
+  pushEvent(eventtxcache);
 }
diff --git a/uappbase/service/app_event_bus.hpp b/uappbase/service/app_event_bus.hpp
index 52179c9..fce9694 100644
--- a/uappbase/service/app_event_bus.hpp
+++ b/uappbase/service/app_event_bus.hpp
@@ -29,6 +29,8 @@ class AppEventBus {
 
   void pushPageChangeEvent(uint8_t toPage);
   void callFnInEventBus(function<void()> onfnc);
+
+   void pushStateDisplayInfoEvent(const char* info) ;
 };
 
 }  // namespace iflytop
diff --git a/uappbase/service/gstate_mgr.cpp b/uappbase/service/gstate_mgr.cpp
index 18c571f..ca7dd2b 100644
--- a/uappbase/service/gstate_mgr.cpp
+++ b/uappbase/service/gstate_mgr.cpp
@@ -59,7 +59,8 @@ void GStateMgr::setRemoterS(int32_t state, const char* name) {
   if (state) {
     ZLOGI(TAG, "on ble connect -> client name:%s", name);
     strncpy(m_RemoterName, name, sizeof(m_RemoterName));
-    strncpy(appevent.d.bleName, name, sizeof(appevent.d.bleName));
+    // strncpy(appevent.d.bleName, name, sizeof(appevent.d.bleName));
+    appevent.setBleName(name);
     appevent.type = kAE_RemoterConnectedEvent;
 
   } else {
diff --git a/usrc/service/pump_ctrl_service.cpp b/usrc/service/pump_ctrl_service.cpp
index f5efa2d..3669418 100644
--- a/usrc/service/pump_ctrl_service.cpp
+++ b/usrc/service/pump_ctrl_service.cpp
@@ -11,7 +11,7 @@ using namespace iflytop;
 static TMC51X0* m_motors[4];
 #define PUMP_NUM 4
 
-#define PUSH_DIS_INFO(info) AppEventBus::ins()->pushEvent(createStateDisplayInfoEvent(info))
+#define PUSH_DIS_INFO(info) AppEventBus::ins()->pushStateDisplayInfoEvent(info);
 
 void PumpCtrlService::initialize() {
   m_motors[0] = AppHardware::ins()->getPump(0);
@@ -34,7 +34,6 @@ void PumpCtrlService::initialize() {
   });
   m_monitor_thread.init("PumpCtrlServiceMonitor", 1024);
 
-
 #if ENABLE_MOTOR_CHECK_THREAD
   m_monitor_thread.start([this]() {
     for (size_t i = 0; i < 4; i++) {
diff --git a/usrc/uicontroler/base/page_processer.cpp b/usrc/uicontroler/base/page_processer.cpp
index bb36ba0..459290a 100644
--- a/usrc/uicontroler/base/page_processer.cpp
+++ b/usrc/uicontroler/base/page_processer.cpp
@@ -30,12 +30,12 @@ void IPageProcesser::initialize() {
 
   AppEventBus::ins()->regOnEvent([this](AppEvent* event) {
     if (event->type == KAE_UIEvent) {
-      if (thisPage != event->d.uiEvent.pid) {
+      if (thisPage != event->getUIEvent()->pid) {
         return;
       }
 
       // uint8_t bid = event->d.uiEvent.bid;
-      UIEvent* uiEvent = &event->d.uiEvent;
+      UIEvent* uiEvent = event->getUIEvent();
 
       if (uiEvent->eventId == kpt_sys_event_page_id) {
         OnPageLoadContext cxt = {0};
@@ -59,7 +59,7 @@ void IPageProcesser::initialize() {
       }
       //
     } else if (event->type == KAE_PageChangeEvent) {
-      if (thisPage != event->d.pageChangeTo) {
+      if (thisPage != event->getUIEvent()->pid) {
         return;
       }
       onChangePageEvent();
diff --git a/usrc/uicontroler/page/home_page.cpp b/usrc/uicontroler/page/home_page.cpp
index dff2174..204ef7a 100644
--- a/usrc/uicontroler/page/home_page.cpp
+++ b/usrc/uicontroler/page/home_page.cpp
@@ -117,7 +117,7 @@ class HomePage : public IPageProcesser {
     } else if (event->type == kAE_AcidStatChangeEvent) {
       syncStat();  // 初始化统计数据
     } else if (event->type == kAppEvent_StateDisplayInfo) {
-      UIS->setTxt(thisPage, ob_home_sysInfo, event->d.stateDisplayInfo);
+      UIS->setTxt(thisPage, ob_home_sysInfo, event->getStateDisplayInfo());
     }
   }
 
diff --git a/usrc/uicontroler/page/mupage/muReCtrlerBind_page.cpp b/usrc/uicontroler/page/mupage/muReCtrlerBind_page.cpp
index 9c2c9ed..9f629af 100644
--- a/usrc/uicontroler/page/mupage/muReCtrlerBind_page.cpp
+++ b/usrc/uicontroler/page/mupage/muReCtrlerBind_page.cpp
@@ -99,9 +99,9 @@ class muReCtrlerBindPage : public IPageProcesser {
     if (event->type == kAE_RemoterConnectedEvent) {
       ZLOGI(TAG, "ble connect success");
       setText(ob_muReCtlerBind_infoWin, "%s", "扫描到设备");
-      DeviceSettingDao::updateBleClientName(event->d.bleName);
+      DeviceSettingDao::updateBleClientName(event->getBleName());
       setText(ob_muReCtlerBind_infoWin, "%s", "绑定成功");
-      setText(ob_muReCtlerBind_bleCliName, "%s", event->d.bleName);
+      setText(ob_muReCtlerBind_bleCliName, "%s", event->getBleName());
       m_scaning = false;
     }
   }
diff --git a/usrc/uicontroler/ui_controler.cpp b/usrc/uicontroler/ui_controler.cpp
index c31c416..0ec40c6 100644
--- a/usrc/uicontroler/ui_controler.cpp
+++ b/usrc/uicontroler/ui_controler.cpp
@@ -68,7 +68,7 @@ void UIControler::pageInitialize() { UIControlerHock_PageInit(); }
 void UIControler::callUsrEventCb(UIEvent* event) {
   static AppEvent appEvent;
   appEvent.type = KAE_UIEvent;
-  memcpy(&appEvent.d.uiEvent, event, sizeof(UIEvent));
+  memcpy(appEvent.getUIEvent(), event, sizeof(UIEvent));
   AppEventBus::ins()->pushEvent(appEvent);
 }