diff --git a/gui/app.js b/gui/app.js
index 2d9da03..604efe6 100644
--- a/gui/app.js
+++ b/gui/app.js
@@ -97,7 +97,7 @@ function refresh_ports() {
     const ports_array = response;
 
     // Проверка длины массива
-    if (ports_array.length > 0) {
+    if (ports_array.ports.length > 0) {
       port_selector.innerHTML = '';
     } else {
       alert('Отсутсвуют подключённые устройства!');
diff --git a/src/config.h b/src/config.h
new file mode 100644
index 0000000..f2da001
--- /dev/null
+++ b/src/config.h
@@ -0,0 +1,11 @@
+/*
+ * AUTHOR: Alexander Popov <iiiypuk {at} fastmail.fm>
+ * DESC: ...
+ */
+
+#ifndef CONFIG_H_
+#define CONFIG_H_
+
+#define DEBUG
+
+#endif
diff --git a/src/main.c b/src/main.c
index 842536e..703c916 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2,6 +2,8 @@
 #include <string.h>
 
 #include "webui.h"
+
+#include "config.h"
 #include "html.h"
 #include "ui.h"
 #include "device.h"
@@ -12,13 +14,10 @@ int main(int argc, char const *argv[]) {
     int app_window = webui_new_window();
 
     html_document[html_document_len] = '\0';
-    // html_document[html_document_len + 1] = '\0';
 
-    if (argc > 1 && strcmp(argv[1], "icanthink") == 0) {
-    }
-    else {
-        webui_set_kiosk(app_window, true);
-    }
+#ifdef DEBUG
+    webui_set_kiosk(app_window, true);
+#endif
 
     webui_bind(app_window, "close_app", close_app);
     webui_bind(app_window, "webui_refresh_ports", refresh_devices);
diff --git a/src/ui.c b/src/ui.c
index 0627e00..599b597 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -12,9 +12,13 @@ void close_app(webui_event_t* e) {
 }
 
 void refresh_devices(webui_event_t* e) {
-    printf("ololo\n");
+    const char *available_ports = json_dumps(get_serial_ports(), 0);
 
-    webui_return_string(e, json_dumps(get_serial_ports(), 0));
+#ifdef DEBUG
+    printf("Доступные порты:\n%s\n", available_ports);
+#endif
+
+    webui_return_string(e, available_ports);
 }
 
 void connect_device(webui_event_t* e) {
diff --git a/src/ui.h b/src/ui.h
index 3832895..fd37599 100644
--- a/src/ui.h
+++ b/src/ui.h
@@ -11,6 +11,7 @@
 #include <jansson.h>
 #include "webui.h"
 
+#include "config.h"
 #include "device.h"
 
 void close_app(webui_event_t* e);