diff --git a/bsp/src/bsp_bt.c b/bsp/src/bsp_bt.c
index f84b3b8..82cf82a 100644
--- a/bsp/src/bsp_bt.c
+++ b/bsp/src/bsp_bt.c
@@ -396,6 +396,7 @@ int BSP_Bt_Process (uint8_t *data, uint16_t len)
             }
             to_sever_send_bt_connect_flag = 1;
             Ml307_Send_Event (kMl307ValveConnectEvent);
+
         }
         else
         {
diff --git a/bsp/src/bsp_ml307.c b/bsp/src/bsp_ml307.c
index da72de1..2fdfd74 100644
--- a/bsp/src/bsp_ml307.c
+++ b/bsp/src/bsp_ml307.c
@@ -1813,6 +1813,8 @@ static void Ml307_Send_Thread_Entry (void *param)
                     {
                         LOG_E ("ml307 send data failed result = [%d]\n", result);
                     }
+                    rt_thread_mdelay(5000);
+                    Ml307_Send_Event (kMl307HeartbeatEvent);
                 }
                 else if (ml307_recv_event & Ml307_Get_Event_Flag (KMl307ValveDisconnectEvent))
                 {