diff --git a/src/WiFiConfig.cpp b/src/WiFiConfig.cpp
index b4f5e0b..8094c5e 100644
--- a/src/WiFiConfig.cpp
+++ b/src/WiFiConfig.cpp
@@ -1,4 +1,7 @@
 /*
+ * V6.3 - 12.8.2019 - IP adresa Captive portalu je zmenena na 172.217.28.1 kvuli funkcnosti na Android zarizenich (viz. zmena zde https://github.com/esp8266/Arduino/blob/master/libraries/DNSServer/examples/CaptivePortal/CaptivePortal.ino)
+ *             ladici vypis pri zachyceni presmerovani v Captive portalu.
+ *
  * V6.2 - 12.12.2018- Nastaveni jmena zarizeni nadale NENI soucasti WiFiConfig a je treba ho pridat jako uzivatelsky parametr. Je to proto, protoze
  *             se ukazalo, ze neni dobre z externiho kodu sahat do vnitrni struktury WiFiConfig (napr. pri ukladani noveho jmena).
  *
@@ -313,7 +316,13 @@ void WiFiConfig::_handleNotFound(void)
   }
   else
   {
-    server->sendHeader(F("Location"), String(F("http://")) + server->client().localIP().toString() + String(F("/index.htm")), true);
+    String redirect;
+    redirect.reserve(256);
+    redirect = F("http://");
+    redirect.concat(server->client().localIP().toString());
+    redirect.concat(F("/index.htm"));
+    DEBUG_MSG("Redirection to: %s\r\n", redirect.c_str());
+    server->sendHeader(F("Location"), redirect, true);
     server->send_P(302, TEXTPLAIN, PSTR("Redirect"));
   }
 }
@@ -697,7 +706,7 @@ wificonfigresult_t WiFiConfig::_setupAP(wificonfig_cb cb)
 #endif
 
   /* Soft AP network parameters */
-  IPAddress apIP(192, 168, 4, 1);
+  IPAddress apIP(172, 217, 28, 1);
   IPAddress netMsk(255, 255, 255, 0);
 
   WiFi.disconnect(); // pro jistotu se odpojime