diff --git a/apps/iot/src/iot_device.erl b/apps/iot/src/iot_device.erl
index da8234d..87a42d7 100644
--- a/apps/iot/src/iot_device.erl
+++ b/apps/iot/src/iot_device.erl
@@ -262,8 +262,8 @@ handle_cast({ai_event, EventType, Params}, State = #state{device_uuid = DeviceUU
             case Timestamp >= LastTimestamp + Interval of
                 true ->
                     %% todo
-                    lager:debug("[iot_device] device_uuid: ~p, ai_event triggered last_timestamp: ~p, current_timestamp: ~p",
-                        [DeviceUUID, LastTimestamp, Timestamp]),
+                    lager:debug("[iot_device] device_uuid: ~p, ai_event triggered last_timestamp: ~p, current_timestamp: ~p, interval is: ~p",
+                        [DeviceUUID, LastTimestamp, Timestamp, Interval]),
                     % iot_ai_router:route_uuid(DeviceUUID, EventType, Params),
                     {noreply, State#state{ai_event_ttl = maps:put(EventType, Timestamp, EventTTL)}};
                 false ->
@@ -272,6 +272,7 @@ handle_cast({ai_event, EventType, Params}, State = #state{device_uuid = DeviceUU
                     {noreply, State}
             end;
         error ->
+            lager:debug("[iot_device] device_uuid: ~p, ai_event type: ~p not limited", [DeviceUUID, EventType]),
             iot_ai_router:route_uuid(DeviceUUID, EventType, Params),
             {noreply, State}
     end.