diff --git a/apps/iot/src/iot_host.erl b/apps/iot/src/iot_host.erl
index 53ab857..560ba57 100644
--- a/apps/iot/src/iot_host.erl
+++ b/apps/iot/src/iot_host.erl
@@ -285,6 +285,7 @@ handle_event(cast, {handle, {ping, CipherMetric}}, session, State = #state{uuid
     end;
 
 handle_event(cast, {handle, {inform, Info0}}, session, State = #state{host_id = HostId, aes = AES}) ->
+    lager:debug("[iot_host] handler inform, aes: ~p", [AES]),
     Info = iot_cipher_aes:decrypt(AES, Info0),
     case catch jiffy:decode(Info, [return_maps]) of
         #{<<"at">> := At, <<"services">> := ServiceInforms} ->