diff --git a/README.md b/README.md
index 32bde89..8a63093 100644
--- a/README.md
+++ b/README.md
@@ -15,8 +15,12 @@ TODO
 5. 充电中，限制用户操作 ,充电时，不测量，但没有任何提示。OK
 7. 开机时进行低电量检测 OK
 3. 修改心率采样ADC参考电压  OK
-8. 记录上传添加校验和
-9. 5分钟蓝牙未发送任何消息，自动断开蓝牙连接
+8. 记录上传添加校验和 OK
+9. 5分钟蓝牙未发送任何消息，自动断开蓝牙连接 OK
+12. 添加看门狗 OK
+
+11. 添加心率检测 
+
 
 
 
diff --git a/app/src/ble_cmd_process_service.c b/app/src/ble_cmd_process_service.c
index 447b9bf..b176d2e 100644
--- a/app/src/ble_cmd_process_service.c
+++ b/app/src/ble_cmd_process_service.c
@@ -207,7 +207,7 @@ int ble_start_upload_record(sample_data_filename_t* recordid) {
     return kifyhrs_ecode_no_record_find;
   }
 
-  ZERROR_CHECK(app_timer_start(m_record_upload_tmr, APP_TIMER_TICKS(2), NULL));
+  ZERROR_CHECK(app_timer_start(m_record_upload_tmr, APP_TIMER_TICKS(15), NULL));
   m_isupload_data_state      = true;
   m_remaindatalen            = 0;
   m_report_data_sumcheckcode = 0;
diff --git a/app/src/board/board.h b/app/src/board/board.h
index c603d7a..95ef75e 100644
--- a/app/src/board/board.h
+++ b/app/src/board/board.h
@@ -47,3 +47,4 @@
 #define APP_LOW_BATTERY_WARNING_LIMIT 20  // 
 
 #define LOW_BATTERY_REMINDER_DELAY_MS 3000
+#define BLE_UNCONNECTED_OVERTIME_S 300
\ No newline at end of file
diff --git a/app/src/one_conduction_main.c b/app/src/one_conduction_main.c
index d1e07aa..8b14942 100644
--- a/app/src/one_conduction_main.c
+++ b/app/src/one_conduction_main.c
@@ -49,6 +49,7 @@ static sample_data_filename_t sampledata_file_name;
 static void state_machine_driver_tmr_cb(void* p_context) {  //
   static app_event_t appevent;
   appevent.eventType = kevent_tmr_scheduler_event;
+  wd_feed();
   AppEvent_pushEvent(&appevent);
 }
 /*******************************************************************************
@@ -234,6 +235,11 @@ static void app_event_listener(void* p_event_data, uint16_t event_size) {
     // 低电量，设备进入待机模式
     else if (BoardBattery_get_battery_level() < APP_AUTO_STANDY_BATTERY_LEVEL && ds_cur_state_haspassed_ms() > 3000) {
       state_machine__change_to_standby_state();
+    }  //
+
+    else if (zble_module_is_connected() && zdatachannel_last_rx_data_haspassed_s() >= BLE_UNCONNECTED_OVERTIME_S) {
+      ZLOGI("auto sleep because ble unconnected");
+      state_machine__change_to_standby_state();
     }
     // ZLOGI("bt:%d plod:%d has_disc:%d state:%d", zdatachannel_is_connected(), BoardEcgSensor_plod_get_connected_state_after_filter(), plod_state_has_disconnected_ms(), ds_cur_state_haspassed_ms());
   }
@@ -415,6 +421,8 @@ void one_conduction_main() {
   }
 #endif
 
+  wd_init();
+
   ZERROR_CHECK(app_timer_create(&m_state_machine_driver_tmr, APP_TIMER_MODE_REPEATED, state_machine_driver_tmr_cb));
   ZERROR_CHECK(app_timer_start(m_state_machine_driver_tmr, APP_TIMER_TICKS(300), NULL));