diff --git a/Power_Pico/User/GUI/PageManager.c b/Power_Pico/User/GUI/PageManager.c
index 71fdd74..0972006 100644
--- a/Power_Pico/User/GUI/PageManager.c
+++ b/Power_Pico/User/GUI/PageManager.c
@@ -100,3 +100,16 @@ Page_t* PageManager_get_current_page(void) {
     if (PageManager.count == 0) return NULL;
     return PageManager.pages[PageManager.current_index];
 }
+
+/**
+ * 处理按键事件，调用当前页面的按键事件处理函数
+ * @param key_id 按键ID
+ */
+void PageManager_handle_key_event(uint8_t key_id) {
+    Page_t* current_page = PageManager_get_current_page();
+    if (current_page && current_page->key_event_handler) {
+        current_page->key_event_handler(key_id); // 调用当前页面的按键事件处理函数
+    } else {
+        printf("No key event handler for current page\n");
+    }
+}
diff --git a/Power_Pico/User/GUI/PageManager.h b/Power_Pico/User/GUI/PageManager.h
index 610b95d..49464f3 100644
--- a/Power_Pico/User/GUI/PageManager.h
+++ b/Power_Pico/User/GUI/PageManager.h
@@ -11,6 +11,7 @@ typedef struct {
     void (*init)(void);
     void (*deinit)(void);
     lv_obj_t** page_obj;  // 指向页面对象指针的指针
+    void (*key_event_handler)(uint8_t key_id); // 按键事件处理函数
     const char* name;     // 可选：用于调试
 } Page_t;
 
@@ -27,10 +28,11 @@ extern PageManager_t PageManager;
 // API 函数声明
 void PageManager_init(void);
 void PageManager_register(Page_t* page);
+void PageManager_load_init_screen(void);
 void PageManager_next(void);
 void PageManager_prev(void);
 void PageManager_goto(uint8_t index);
 Page_t* PageManager_get_current_page(void);
-void PageManager_load_init_screen(void);
+void PageManager_handle_key_event(uint8_t key_id);
 
 #endif // PAGE_MANAGER_H
diff --git a/Power_Pico/User/GUI/screens/ui_mainPage.c b/Power_Pico/User/GUI/screens/ui_mainPage.c
index b40a518..f41180e 100644
--- a/Power_Pico/User/GUI/screens/ui_mainPage.c
+++ b/Power_Pico/User/GUI/screens/ui_mainPage.c
@@ -223,3 +223,8 @@ void ui_main_screen_destroy(void)
     _flush_timer = NULL;
 
 }
+
+void ui_main_page_key_handler(uint8_t key_id)
+{
+    // nothing to do
+}
diff --git a/Power_Pico/User/GUI/screens/ui_mainPage.h b/Power_Pico/User/GUI/screens/ui_mainPage.h
index ac03fe5..c78f3ad 100644
--- a/Power_Pico/User/GUI/screens/ui_mainPage.h
+++ b/Power_Pico/User/GUI/screens/ui_mainPage.h
@@ -8,6 +8,7 @@ extern "C" {
 // SCREEN: ui_Screen1
 void ui_main_screen_init(void);
 void ui_main_screen_destroy(void);
+void ui_main_page_key_handler(uint8_t key_id);
 
 extern lv_obj_t * ui_HomeScreen;
 
diff --git a/Power_Pico/User/GUI/ui.c b/Power_Pico/User/GUI/ui.c
index fb8f5f7..654bd2b 100644
--- a/Power_Pico/User/GUI/ui.c
+++ b/Power_Pico/User/GUI/ui.c
@@ -12,6 +12,7 @@ Page_t pages[] = {
         .init = ui_main_screen_init,
         .deinit = ui_main_screen_destroy,
         .page_obj = &ui_HomeScreen,
+        .key_event_handler = ui_main_page_key_handler,
         .name = "Main Page"
     },
     // 可以在这里添加更多页面
@@ -28,6 +29,7 @@ Page_t pages[] = {
  */
 static void main_timer(lv_timer_t * timer)
 {
+    // do nothing
     // LV_LOG_WARN("Main timer");
 }
 
diff --git a/Power_Pico/User/Tasks/Inc/user_SendTask.h b/Power_Pico/User/Tasks/Inc/user_SendTask.h
deleted file mode 100644
index f8d18bd..0000000
--- a/Power_Pico/User/Tasks/Inc/user_SendTask.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef __USER_SENDTASK_H__
-#define __USER_SENDTASK_H__
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void UartSendTask(void *argument);
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
-
diff --git a/Power_Pico/User/Tasks/Src/user_DataTask.c b/Power_Pico/User/Tasks/Src/user_DataTask.c
index f3f87ff..a2a1bf2 100644
--- a/Power_Pico/User/Tasks/Src/user_DataTask.c
+++ b/Power_Pico/User/Tasks/Src/user_DataTask.c
@@ -29,20 +29,10 @@ void DataTask(void *argument)
     if(osMessageQueueGet(Key_MessageQueue, &keystr, NULL, 0)==osOK)
 		{
       // UART6_TX_Send((uint8_t *)"key pressed\r\n", 13);
-
     }
-    // __disable_irq();
-    // if(adc_buf_index == 0)
-    //   memcpy((uint16_t*)adc_packet.data, (uint16_t*)ADC_BUF[1], sizeof(adc_packet.data));
-    // else
-    //   memcpy((uint16_t*)adc_packet.data, (uint16_t*)ADC_BUF[0], sizeof(adc_packet.data));
-    // __enable_irq();
-    // adc_packet.header[0] = 0x55;
-    // adc_packet.header[1] = 0xAA;
-    // adc_packet.header[2] = ADC_TIMES;
-    // adc_packet.header[3] = ADC_CHANELS;
-    // adc_packet.header[4] = 0x10;
-    // HAL_UART_Transmit_DMA(&huart6, (uint8_t *)&adc_packet, sizeof(adc_packet));
-		osDelay(1);
+
+    // over current and valtage, beep
+
+		osDelay(100);
 	}
 }
diff --git a/Power_Pico/User/Tasks/Src/user_SendTask.c b/Power_Pico/User/Tasks/Src/user_SendTask.c
deleted file mode 100644
index 9fa688c..0000000
--- a/Power_Pico/User/Tasks/Src/user_SendTask.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/* Private includes -----------------------------------------------------------*/
-//includes
-#include "user_TasksInit.h"
-#include "main.h"
-#include "adc.h"
-#include "gate.h"
-#include "usart.h"
-/* Private typedef -----------------------------------------------------------*/
-
-/* Private define ------------------------------------------------------------*/
-
-// 定义档位阈值
-#define LOW_TO_MID_THRESHOLD 55000 // 550uA
-#define MID_TO_LOW_THRESHOLD 45000 // 450uA (滞回)
-#define MID_TO_HIGH_THRESHOLD 5000000 // 50mA
-#define HIGH_TO_MID_THRESHOLD 4500 // 45mA (滞回)
-
-// 定义连续超过阈值的次数
-#define SWITCH_COUNT_THRESHOLD 2
-
-// 切换计数器
-uint8_t low_to_mid_count = 0;
-uint8_t mid_to_low_count = 0;
-uint8_t mid_to_high_count = 0;
-uint8_t high_to_mid_count = 0;
-
-/* Private variables ---------------------------------------------------------*/
-
-/* Private function prototypes -----------------------------------------------*/
-
-// 检查当前电流并根据阈值切换流路
-void check_and_switch_flow_route(uint8_t unit, uint32_t cur) {
-  if (unit == LOW_CUR) {
-      if (cur > LOW_TO_MID_THRESHOLD) {
-          low_to_mid_count++;
-          if (low_to_mid_count >= SWITCH_COUNT_THRESHOLD) {
-              flow_route_selection(MID_CUR); // 切换到中档位
-              low_to_mid_count = 0; // 重置计数器
-          }
-      } else {
-          low_to_mid_count = 0; // 清零计数器
-      }
-  } else if (unit == MID_CUR) {
-      if (cur > MID_TO_HIGH_THRESHOLD) {
-          mid_to_high_count++;
-          if (mid_to_high_count >= SWITCH_COUNT_THRESHOLD) {
-              flow_route_selection(HIGH_CUR); // 切换到高档位
-              mid_to_high_count = 0; // 重置计数器
-          }
-      } else if (cur < MID_TO_LOW_THRESHOLD) {
-          mid_to_low_count++;
-          if (mid_to_low_count >= SWITCH_COUNT_THRESHOLD) {
-              flow_route_selection(LOW_CUR); // 切换到低档位
-              mid_to_low_count = 0; // 重置计数器
-          }
-      } else {
-          mid_to_high_count = 0; // 清零计数器
-          mid_to_low_count = 0; // 清零计数器
-      }
-  } else if (unit == HIGH_CUR) {
-      if (cur < HIGH_TO_MID_THRESHOLD) {
-          high_to_mid_count++;
-          if (high_to_mid_count >= SWITCH_COUNT_THRESHOLD) {
-              flow_route_selection(MID_CUR); // 切换到中档位
-              high_to_mid_count = 0; // 重置计数器
-          }
-      } else {
-          high_to_mid_count = 0; // 清零计数器
-      }
-  }
-}
-
-/**
-  * @brief  task for send messages or data
-  * @param  argument: Not used
-  * @retval None
-  */
-void UartSendTask(void *argument)
-{
-  uint8_t keystr = 0;
-  uint16_t cur_bias = 4096 / 2;
-	while(1)
-	{
-    if(osMessageQueueGet(Key_MessageQueue, &keystr, NULL, 0)==osOK)
-		{
-      // UART6_TX_Send((uint8_t *)"key pressed\r\n", 13);
-    }
-    // send protocol frame
-    for(int i = 0 ; i < ADC_TIMES ; i++)
-    {
-      // direct & unit
-      uint8_t dir_unit = 0x00; // 0x00 means: positive, (A) unit
-      uint8_t unit = Gate_get_status(); // 0 - low current(500uA), 1 - mid current(50mA), 2 - high current(5A)
-      dir_unit = (unit & 0x0F); // unit
-      // current
-      uint32_t cur;
-      uint64_t cur_adc; // 64位避免溢出
-      // voltage = VADC/4096 * 3.0Vref * 11( this means: 1MR + 100kR)
-      uint16_t volt = adc_buf[i][3] * 3 * 11 * 100 / 4096; // 100times
-      // cur direction and value
-      if(adc_buf[i][2-unit] > cur_bias) {
-        dir_unit |= 0x10; // negative
-        cur_adc = adc_buf[i][2-unit] - cur_bias;
-      }
-      else {
-        cur_adc = cur_bias - adc_buf[i][2-unit];
-      }
-      // cur = (IADC/4096 * 3.0Vref - 1.5Vref) / 50(ina199) / R
-      if(unit == HIGH_CUR) {
-        cur = cur_adc * 3 * 100 * 1000 / HIGH_CUR_RES / 50 / 4096; // 100times. (mA)
-      }
-      else if(unit == MID_CUR) {
-        cur = cur_adc * 3 * 100 * 1000000 / MID_CUR_RES / 50 / 4096; // 100times. (uA)
-      }
-      else if(unit == LOW_CUR) {
-        cur = cur_adc * 3 * 100 * 1000000 / LOW_CUR_RES / 50 / 4096; // 100times. (uA)
-      }
-
-      check_and_switch_flow_route(unit, cur); // 检查并切换流路
-
-      // protocol frame
-      uint8_t protocol_frame[11] = {0x55, 0xAA, dir_unit, (cur>>24 & 0xff), (cur>>16 & 0xff), (cur>>8 & 0xff), (cur & 0xff), (volt>>8 & 0xff), (volt & 0xff), 0xAA, 0x55};
-      UART6_TX_Send(protocol_frame, sizeof(protocol_frame));
-    }
-		osDelay(1);
-	}
-}