diff --git a/apps/iot/src/iot_host.erl b/apps/iot/src/iot_host.erl
index 61d0fa9..67a403f 100644
--- a/apps/iot/src/iot_host.erl
+++ b/apps/iot/src/iot_host.erl
@@ -237,6 +237,7 @@ handle_event(cast, need_auth, _StateName, State = #state{uuid = UUID}) ->
 %% 需要将消息转换成json格式然后再处理, 需要在host进程里面处理
 %% 收到消息则认为主机端已经发送了心跳包
 handle_event(cast, {handle, Payload}, _StateName, State) ->
+    lager:debug("[iot_host] get payload: ~p", [Payload]),
     Message = catch jiffy:decode(Payload, [return_maps]),
     lager:debug("[iot_host] get message: ~p", [Message]),
     gen_statem:cast(self(), {handle_message, Message}),