diff --git a/apps/iot/src/http_handler/http_host_handler.erl b/apps/iot/src/http_handler/http_host_handler.erl
index 95779b6..74f99bf 100644
--- a/apps/iot/src/http_handler/http_host_handler.erl
+++ b/apps/iot/src/http_handler/http_host_handler.erl
@@ -78,7 +78,10 @@ handle_request("POST", "/host/publish_command", _,
                 <<"ts">> => iot_util:current_time(),
                 <<"m">> => iolist_to_binary(jiffy:encode(Params, [force_utf8]))
             },
-            BinReply = iolist_to_binary(jiffy:encode(append_service_name(PostParams, Reply), [force_utf8])),
+
+            Reply1 = append_service_name(PostParams, Reply),
+            lager:debug("[http_host_handler] publish message is: ~p", [Reply1]),
+            BinReply = iolist_to_binary(jiffy:encode(Reply1, [force_utf8])),
 
             case iot_host:aes_encode(Pid, CommandType, BinReply) of
                 {error, Reason} when is_binary(Reason) ->