make mqtt logging configurable

PreferencesKeys.h

@@ -6,6 +6,7 @@
 #define preference_mqtt_broker_port "mqttport"
 #define preference_mqtt_user "mqttuser"
 #define preference_mqtt_password "mqttpass"
+#define preference_mqtt_log_enabled "mqttlog"
 #define preference_lock_enabled "lockena"
 #define preference_mqtt_lock_path "mqttpath"
 #define preference_opener_enabled "openerena"

WebCfgServer.cpp

@@ -277,6 +277,11 @@ bool WebCfgServer::processArgs(String& message)
             _preferences->putInt(preference_restart_timer, value.toInt());
             configChanged = true;
         }
+        else if(key == "MQTTLOG")
+        {
+            _preferences->putBool(preference_mqtt_log_enabled, (value == "1"));
+            configChanged = true;
+        }
         else if(key == "LSTINT")
         {
             _preferences->putInt(preference_query_interval_lockstate, value.toInt());
@@ -586,6 +591,7 @@ void WebCfgServer::buildMqttConfigHtml(String &response)
     printInputField(response, "NETTIMEOUT", "Network Timeout until restart (seconds; -1 to disable)", _preferences->getInt(preference_network_timeout), 5);
     printCheckBox(response, "RSTDISC", "Restart on disconnect", _preferences->getBool(preference_restart_on_disconnect));
     printInputField(response, "RSTTMR", "Restart timer (minutes; -1 to disable)", _preferences->getInt(preference_restart_timer), 10);
+    printCheckBox(response, "MQTTLOG", "Enable MQTT logging", _preferences->getBool(preference_mqtt_log_enabled));
     response.concat("</table>");
     response.concat("* If no encryption is configured for the MQTT broker, leave empty. Only supported for WiFi connections.<br>");
 

networkDevices/W5500Device.cpp

@@ -42,6 +42,9 @@ void W5500Device::initialize()
     _mqttClient = new PubSubClient(*_ethClient);
     _mqttClient->setBufferSize(_mqttMaxBufferSize);
 
+
+    if(_preferences->getBool(preference_mqtt_log_enabled))
+    {
         _path = new char[200];
         memset(_path, 0, sizeof(_path));
 
@@ -49,6 +52,7 @@ void W5500Device::initialize()
         pathStr.concat(mqtt_topic_log);
         strcpy(_path, pathStr.c_str());
         Log = new MqttLogger(*_mqttClient, _path);
+    }
 
     reconnect();
 }

networkDevices/WifiDevice.cpp

@@ -41,11 +41,17 @@ WifiDevice::WifiDevice(const String& hostname, Preferences* _preferences)
         _mqttClient = new PubSubClient(*_wifiClient);
     }
 
+    if(_preferences->getBool(preference_mqtt_log_enabled))
+    {
+        _path = new char[200];
+        memset(_path, 0, sizeof(_path));
+
         String pathStr = _preferences->getString(preference_mqtt_lock_path);
         pathStr.concat(mqtt_topic_log);
         strcpy(_path, pathStr.c_str());
         Log = new MqttLogger(*_mqttClient, _path);
     }
+}
 
 PubSubClient *WifiDevice::mqttClient()
 {