diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
index 27b1ced..4d655ed 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
@@ -1017,6 +1017,7 @@ void manage_dbn_ble_transparent(uint8_t *pkg, uint8_t len)
 
 void poll_dbn_ble(void)
 {
+    static uint8_t _last_ntf_flag = 0;
     uint8_t i = 0;
     uint8_t magic = 0;
     if(g_ble_rcv_buf.flag)
@@ -1071,6 +1072,13 @@ void poll_dbn_ble(void)
             _last_resp_flag = g_buf_ble_response.flag;
         }
     }
+    if(g_notify_buftemp.flag != _last_ntf_flag)
+    {
+        PRINT("BLE ntf flag %d->%d (len=%d temp=%d)\n",
+               _last_ntf_flag, g_notify_buftemp.flag, g_notify_buftemp.len,
+               g_flag_notify_temp);
+        _last_ntf_flag = g_notify_buftemp.flag;
+    }
 }