Captive Portal does't work on Android devices...

[e-music]

Hi,

I tried on many different devices, but Captive Portal doesn't work on any of my Android devices. Only on my iPhone, the config portal immediately comes up as soon as the phone is connected to the ESP8266 AP.

Any advice?

Thanks

[ghost]

I noticed this on a stock Samsung Galaxy S9+ running Android 8.1, the "Sign On" page isn't brought up automatically, but I can't reproduce it on my LineageOS 15.1 (Oreo) or LineageOS 16.0 (Pie).

Do you have captive portal detection disabled? What Android devices (make, model, Android version) have you tried it on?

[tablatronix]

The latest on this is that, android (some versions) either have a sandboxed dns system, or use hardcoded google dns 8.8.8.8 and ignores our captive portal there is an issue open in esp arduino if you want to find it and read the comments.

[ghost]

Seems like espressif/arduino-esp32#1037 is what you're referring to?

[e-music]

@h4waii
Yes, exactly the same issue!
I tried on Samsung J5 Prime, S8, and Android Tablet. All with the same result!

[ghost]

@e-music Setting 8.8.8.8 as AP IP seems to work around this for me. WiFiManager.setAPStaticIPConfig(IPAddress(8,8,8,8), IPAddress(8,8,8,8), IPAddress(255,255,255,0));
before calling autoConnect() and see how you fare.

[tablatronix]

Thanks all, I do not have android to test on

[e-music]

@h4waii
Thank you. I will try it asap!

[e-music]

@h4waii
WOW!! Changing the IP has solved the issue and now the Captive Portal works on all Android devices!
Thank you very much for your help!