Add support for newer mobile OS changes. (#5529)

* Add support for newer mobile OS changes.

Took me quite a while to figure this out, but according to this issue (espressif/arduino-esp32#1037), in order to get a captive notification to show or the popup to open, the DNS server must resolve to a public IP. It will not work with a pivate one (e.g. 192.168.4.1).

On Android, a notification ("Register with Network") is displayed in top left notification bar.
On IOS, the login popup is displayed.

* Add support for newer mobile OS changes.

Took me quite a while to figure this out, but according to this issue (espressif/arduino-esp32#1037), in order to get a captive notification to show or the popup to open, the DNS server must resolve to a public IP. It will not work with a pivate one (e.g. 192.168.4.1).

On Android, a notification ("Register with Network") is displayed in top left notification bar.
On IOS, the login popup is displayed.

Author: nouser2013

libraries/DNSServer/examples/CaptivePortal/CaptivePortal.ino

@@ -3,7 +3,7 @@
 #include <ESP8266WebServer.h>
 
 const byte DNS_PORT = 53;
-IPAddress apIP(192, 168, 1, 1);
+IPAddress apIP(172, 217, 28, 1);
 DNSServer dnsServer;
 ESP8266WebServer webServer(80);
 

libraries/DNSServer/examples/CaptivePortalAdvanced/CaptivePortalAdvanced.ino

@@ -41,7 +41,7 @@ DNSServer dnsServer;
 ESP8266WebServer server(80);
 
 /* Soft AP network parameters */
-IPAddress apIP(192, 168, 4, 1);
+IPAddress apIP(172, 217, 28, 1);
 IPAddress netMsk(255, 255, 255, 0);