fix mqtt connect

apps/iot/src/endpoint/endpoint_mqtt.erl

@@ -19,7 +19,7 @@
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
 
 %% 消息重发间隔
--define(RETRY_INTERVAL, 5000).
+-define(RETRY_INTERVAL, 15000).
 
 -define(DISCONNECTED, disconnected).
 -define(CONNECTED, connected).
@@ -111,21 +111,23 @@ handle_info({timeout, _, create_postman}, State = #state{buffer = Buffer, status
         {retry_interval, 5000}
     ],
 
-    {ok, ConnPid} = emqtt:start_link(Opts),
-    lager:debug("[endpoint_mqtt] start connect, options: ~p", [Opts]),
-    case catch emqtt:connect(ConnPid, 5000) of
-        {ok, _} ->
-            lager:debug("[endpoint_mqtt] connect success, pid: ~p", [ConnPid]),
-            NBuffer = endpoint_buffer:trigger_n(Buffer),
-            {noreply, State#state{conn_pid = ConnPid, buffer = NBuffer, status = ?CONNECTED}};
-        {error, Reason} ->
-            lager:warning("[endpoint_mqtt] connect get error: ~p", [Reason]),
-            erlang:start_timer(5000, self(), create_postman),
-            {noreply, State};
-        Error ->
-            lager:warning("[endpoint_mqtt] connect get error: ~p", [Error]),
-            erlang:start_timer(5000, self(), create_postman),
-            {noreply, State}
+    try
+        {ok, ConnPid} = emqtt:start_link(Opts),
+        lager:debug("[endpoint_mqtt] start connect, options: ~p", [Opts]),
+        case emqtt:connect(ConnPid, 5000) of
+            {ok, _} ->
+                lager:debug("[endpoint_mqtt] connect success, pid: ~p", [ConnPid]),
+                NBuffer = endpoint_buffer:trigger_n(Buffer),
+                {noreply, State#state{conn_pid = ConnPid, buffer = NBuffer, status = ?CONNECTED}};
+            {error, Reason} ->
+                lager:warning("[endpoint_mqtt] connect get error: ~p", [Reason]),
+                erlang:start_timer(?RETRY_INTERVAL, self(), create_postman),
+                {noreply, State}
+        end
+    catch _:Error->
+        lager:warning("[endpoint_mqtt] connect get error: ~p", [Error]),
+        erlang:start_timer(?RETRY_INTERVAL, self(), create_postman),
+        {noreply, State}
     end;
 
 %% 离线时，忽略数据发送逻辑