diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral.c
index 4190b21..84ad79f 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral.c
@@ -731,6 +731,9 @@ static void performPeriodicTask(void)
 static void peripheralChar4Notify(uint8_t *pValue, uint16_t len)
 {
     attHandleValueNoti_t noti;
+    PRINT("N4 enter: len=%d resp=%d amt=%d seq=%d off=%d\n", len,
+           g_buf_ble_response.flag, g_buf_ble_response.pkg_amount,
+           g_buf_ble_response.pkg_seq, g_buf_ble_response.dat_offset);
     if(len > (peripheralMTU - 3))
     {
         PRINT("Too large noti, len:%d, peripheralMTU:%d\n", len, peripheralMTU);
@@ -749,6 +752,9 @@ static void peripheralChar4Notify(uint8_t *pValue, uint16_t len)
         else
         {
             uint8_t _ti = 0;
+            PRINT("N4 after simpleProfile_Notify: resp=%d amt=%d seq=%d off=%d\n",
+                   g_buf_ble_response.flag, g_buf_ble_response.pkg_amount,
+                   g_buf_ble_response.pkg_seq, g_buf_ble_response.dat_offset);
             PRINT("BLE notify OK, len:%d, MTU:%d\n", len, peripheralMTU);
             for(_ti = 0; _ti < len; _ti++)
             {