diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
index 54fe98a..b7f16d5 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
@@ -190,6 +190,7 @@ static uint8_t set_net_info_to_ready(uint8_t * dat_dst)
  *   and whole pkt <= MAX_BLE_Notify_Buf_LEN (local buf, no overflow)
  *   MTU=23 -> 14, MTU=96 -> 87, MTU>=103 -> 94
  * =============================================================
+ */
 static uint16_t ble_notify_chunk_max(void)
 {
     uint16_t _mtu = peripheral_get_mtu();
diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral.c
index f59d1be..f19479f 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral.c
@@ -694,7 +694,14 @@ static void performPeriodicTask(void)
        do NOT rely on poll_dbn_ble rx events */
     if(g_notify_buftemp.flag == 0)
     {
-        g_flag_notify_temp = set_response_to_notify(&g_buf_ble_response, &g_notify_buftemp);
+        uint8_t _pull = set_response_to_notify(&g_buf_ble_response, &g_notify_buftemp);
+        g_flag_notify_temp = _pull;
+        if(_pull == 0 && g_buf_ble_response.flag)
+        {
+            PRINT("BLE pull FAIL: resp flag=%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);
+        }
     }
 }