diff --git a/apps/iot/src/iot_host.erl b/apps/iot/src/iot_host.erl
index bf77e64..b709e37 100644
--- a/apps/iot/src/iot_host.erl
+++ b/apps/iot/src/iot_host.erl
@@ -13,6 +13,7 @@
 -behaviour(gen_server).
 
 %% API
+-export([test/1]).
 -export([start_link/2, get_name/1, get_pid/1, publish/4]).
 
 %% gen_server callbacks
@@ -26,6 +27,10 @@
     is_connected = false :: boolean()
 }).
 
+test(Id) when is_binary(Id) ->
+    Pid = get_pid(<<"1">>),
+    publish(Pid, <<"/host/", Id/binary>>, <<"hello world">>, 1).
+
 %%%===================================================================
 %%% API
 %%%===================================================================
@@ -124,6 +129,17 @@ handle_cast(_Request, State = #state{}) ->
     {noreply, NewState :: #state{}} |
     {noreply, NewState :: #state{}, timeout() | hibernate} |
     {stop, Reason :: term(), NewState :: #state{}}).
+handle_info({disconnect, ReasonCode, Properties}, State = #state{host = #host{host_id = HostId}}) ->
+    lager:debug("[iot_host] host: ~p, Recv a DISONNECT packet - ReasonCode: ~p, Properties: ~p", [HostId, ReasonCode, Properties]),
+    {stop, disconnected, State};
+handle_info({publish, Message = #{packet_id := PacketId, payload := Payload}}, State = #state{emqx_pid = ConnPid, host = #host{host_id = HostId}}) ->
+    lager:debug("[iot_host] host: ~p, Recv a publish packet: ~p, payload: ~p", [HostId, Message, Payload]),
+    % emqtt:pubrec(ConnPid, PacketId),
+    {noreply, State};
+handle_info({puback, #{packet_id := PacketId, reason_code := ReasonCode}}, State = #state{host = #host{host_id = HostId}}) ->
+    lager:debug("[iot_host] host: ~p, receive puback packet_id: ~p, reason_code: ~p", [HostId, PacketId, ReasonCode]),
+    {noreply, State};
+
 handle_info(Info, State = #state{host = #host{host_id = HostId}}) ->
     lager:debug("host_id: ~p, get info: ~p", [HostId, Info]),
     {noreply, State}.