don't crash on mqtt

src/XD0MQTT.cpp

@@ -88,8 +88,10 @@ static esp_err_t mqtt_event_handler_cb(esp_mqtt_event_handle_t event)
 }
 
 bool XD0MQTT::begin(void) {
-    esp_mqtt_client_config_t mqtt_cfg;
+    static esp_mqtt_client_config_t mqtt_cfg;
         mqtt_cfg.uri = MQTT_BROKER_URI;
+//        mqtt_cfg.host = "home.xd0.de";
+//        mqtt_cfg.port = 8883;
         mqtt_cfg.event_handle = mqtt_event_handler;
         mqtt_cfg.cert_pem = (const char *)rootCACertificate;
         mqtt_cfg.username = MQTT_USERNAME;
@@ -97,6 +99,9 @@ bool XD0MQTT::begin(void) {
         mqtt_cfg.user_context = (void*)this;
 
     ESP_LOGI(TAG, "[APP] Free memory: %d bytes", esp_get_free_heap_size());
+    Serial.printf("BROKER URI: %s\n", MQTT_BROKER_URI);
+    Serial.printf("MQTT USERNAME: %s\n", MQTT_USERNAME);
+    Serial.printf("MQTT PASSWORD: %s\n", MQTT_PASSWORD);
     esp_mqtt_client_handle_t client = esp_mqtt_client_init(&mqtt_cfg);
     //esp_mqtt_client_register_event(client, ESP_EVENT_ANY_ID, mqtt_event_handler, client);
     esp_mqtt_client_start(client);

src/main.cpp

@@ -126,9 +126,9 @@ void setup()
 
   XD0OTA ota("esp32-weatherstation");
   ota.update();
-/*
+
   mqtt.begin();
-*/
+
 }
 
 void loop()