diff --git a/apps/iot/src/iot_api.erl b/apps/iot/src/iot_api.erl
index c3ea881..8ae4f92 100644
--- a/apps/iot/src/iot_api.erl
+++ b/apps/iot/src/iot_api.erl
@@ -85,6 +85,7 @@ handle_cast({ai_event, Id}, State = #state{}) ->
         case hackney:request(post, Url, Headers, Body, [{pool, false}]) of
             {ok, 200, _, ClientRef} ->
                 {ok, RespBody} = hackney:body(ClientRef),
+                lager:debug("[iot_api] send body: ~p, get error is: ~p", [Body, RespBody]),
                 hackney:close(ClientRef);
             {ok, HttpCode, _, ClientRef} ->
                 {ok, RespBody} = hackney:body(ClientRef),