diff --git a/src/transport/udp_server.erl b/src/transport/udp_server.erl
index 6a04552..23f8432 100644
--- a/src/transport/udp_server.erl
+++ b/src/transport/udp_server.erl
@@ -47,8 +47,10 @@ start_link() ->
     {ok, State :: #state{}} | {ok, State :: #state{}, timeout() | hibernate} |
     {stop, Reason :: term()} | ignore).
 init([]) ->
+    ok = iot_log:set_metadata(),
     {ok, UdpServerProps} = application:get_env(iot, udp_server),
     Port = proplists:get_value(port, UdpServerProps),
+    logger:debug("[udp_server] start at port: ~p", [Port]),
     {ok, Socket} = gen_udp:open(Port, [binary, {active, true}]),
     {ok, #state{socket = Socket}}.
 
@@ -116,6 +118,7 @@ handle_heartbeat_packet(Packet, Peer) when is_binary(Packet) ->
         {ok, UUID, Timestamp, Payload, Mac} ->
             case efka_client_store:verify_heartbeat(UUID, Timestamp, Payload, Mac) of
                 true ->
+                    logger:warning("[udp_server] heartbeat auth from peer: ~p, uuid: ~p", [Peer, UUID]),
                     Pid = iot_host:get_pid(UUID),
                     iot_host:heartbeat(Pid);
                 false ->