fix host

apps/iot/src/iot_host_sup.erl

@@ -23,6 +23,8 @@ init([]) ->
 ensured_host_started(UUID) when is_binary(UUID) ->
     case iot_host:get_pid(UUID) of
         undefined ->
+            %% 尝试删除下host对应的信息
+            delete_host(UUID),
             case supervisor:start_child(?MODULE, child_spec(UUID)) of
                 {ok, Pid} when is_pid(Pid) ->
                     {ok, Pid};