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tonyp7 / esp32-wifi-manager

Captive Portal for ESP32 that can connect to a saved wireless network or start an access point where you can connect to existing wifis.
MIT License
664 stars 217 forks source link

no captive portal on Samsung devices #57

Closed cgfoed closed 4 years ago

cgfoed commented 4 years ago

While testing my current project with different devices I noticed that there is no page splash on a samsung device.

Some digging turned out, that they behave a bit special. As solution it is suggested to answer with an empty 204 packet (??). I usually don't have to deal with DNS-stuff ^^'

Anyhow - I'm trying to implement some code to catch that problem. But any help would be highly appreciated. I'll update this Issue as I make any progress.

readings: https://github.com/tripflex/wifi-captive-portal/issues/7

https://community.arubanetworks.com/t5/Wireless-Access/Samsung-Captive-Portal-Detection/m-p/405934#M78972

https://lemariva.com/blog/2017/11/white-hacking-wemos-captive-portal-using-micropython

https://github.com/tripflex/captive-portal/blob/master/src/mgos_captive_portal.c starting line 367

https://socifi-doc.atlassian.net/wiki/spaces/SC/pages/94371841/DNS+Fix+to+keep+Android+Splash+Page+and+the+Captive+Portal+Notification+active

tonyp7 commented 4 years ago

I am testing with a Samsung Galaxy Tab A and an iPhone XS and have no issue with the Galaxy Tab.

If all it takes is registering a few end points then sure I can try doing this. Thanks for the tip from the triplex repo

tonyp7 commented 4 years ago

This is what happens on my samsung device when I connect to the esp:

wifi

When I tap on "sign in to the network" I am lead to the captive portal as expected:

captive portal

tonyp7 commented 4 years ago

@cgfoed any update? I'll close this issue otherwise

cgfoed commented 4 years ago

my tests so far:

Win 10 PC - worked Honor with Android 9 - worked iPhone XR - worked iPhone SE - worked Galaxy S7 with Android 8 - no captive portal Galaxy S10 with Android 9 - no captive portal iPhone XS - worked ZTE #generic_model with Android 8 - worked iPad mini 4 - worked

(i guess it's safe to say it works with iOS in general by now)

hopefully I can test with an Samsung A40 soon.

Wasn't able to tackle that issue in software so far. I created a QR-code which links to 10.10.0.1 to slap on as a sticker as workaround - which I guess is useful anyway.

cgfoed commented 4 years ago

no splash screen on Samsung A40. Same behavior as on all other samsung devices so far - it connects, says there is no internet connection ... and that's it.

tonyp7 commented 4 years ago

Damn it it really sucks that the only Samsung device I have actually works. Not sure what to do to test it. I can change the code to add a 200 OK to http://connectivitycheck.gstatic.com/generate_204; which from the forum links you provided seems to trigger the captive portal.

cgfoed commented 4 years ago

i'll try out any code changes, that you can provide. I also was briefly thinking about sending you a used device, but sg is quite far away ^^'

cgfoed commented 4 years ago

I don't know why and I don't know how. But after much trying and further reading I could solve my problem.

The answer for me was this: https://github.com/esp8266/Arduino/pull/5529/commits/d5265aa5ac4995b65bce3e29025307cfd7ae0d0f#diff-9978b19703e34e9504dcdda781907935

A simple change to ` /* @brief Defines the access point's default IP address. Default: "10.10.0.1 /

define DEFAULT_AP_IP "172.217.28.1"

` solved all my issues with all Galaxy Devices I've tested so far.

cgfoed commented 4 years ago

(Maybe this is worth pointing out in the manual somewhere....)

cgfoed commented 4 years ago

F**k! The behavior on iPhone and other Andrioid devices is now horrible. So changing the default AP IP is not the solution for my problem here. But maybe I'll figure something out now.

baldhead69 commented 4 years ago

In my samsung edge s7 no page "splash" too.

I install de lib today(01/09/2020).

baldhead69 commented 3 years ago

This issue should be open.

kaly7 commented 3 years ago

It work with Android 10 (Huawei) , but android 9 not (LG K20).. any ide, why? :( No captive portal.. if I use http://10.10.0.1 (default ip address) only wait, wait, wait... But have any data traffic:

I (34550) dns_server: Replying to DNS request for www.google.com from 10.10.0.2 I (37410) dns_server: Replying to DNS request for alt7-mtalk.google.com from 10.10.0.2 I (37420) dns_server: Replying to DNS request for connectivitycheck.gstatic.com from 10.10.0.2

:(

orlandev commented 3 years ago

i use IP like 200.200.200.1 and its functional for mi in Samsung devices. I tested in Note8 Android 8.1

i use this configuration and work for me. https://github.com/Qu35t64/CaptivePortal

cgfoed commented 3 years ago

i use IP like 200.200.200.1 and its functional for mi in Samsung devices. I tested in Note8 Android 8.1

i use this configuration and work for me. https://github.com/Qu35t64/CaptivePortal

But does it still work for iOS and other Android devices?

orlandev commented 3 years ago

i use IP like 200.200.200.1 and its functional for mi in Samsung devices. I tested in Note8 Android 8.1 i use this configuration and work for me. https://github.com/Qu35t64/CaptivePortal

But does it still work for iOS and other Android devices?

yes, its work

Inventor-X commented 2 years ago

Hello Guys... I have made a captive portal using apache2 server.... I am not able to see the spash screen on samsung devices..only. I have tried everything that you all have discussed.... But no use..... Can anyone please guide me what should i do...to get it working on samsung devices... PLEASE.....

Inventor-X commented 2 years ago

i use IP like 200.200.200.1 and its functional for mi in Samsung devices. I tested in Note8 Android 8.1 i use this configuration and work for me. https://github.com/Qu35t64/CaptivePortal

But does it still work for iOS and other Android devices?

yes, its work

It is not working..... Can you please suggest anything else......