In loop:

server.handleClient();

That looks to be about the same as what I'm doing. I'll have a think, but my first immediate thoughts are: -Careful with pin 12. If you're using a Wrover, 12 is a strapping pin for internal ldo. In that case, you should be isolating it before sleep to reduce leakage. Use a different pin, and add the...

Have you seen the TTGO Micro 2.0? It's not an official espressif module, of course, but it seems to be exactly what you're describing.

Are you the only one accessing the admin portal? It might be easier to set a password for the AP and let the WiFi stack handle the encryption, rather than implementing it at the server level. It's very easy and more secure than what you're doing now, and probably sufficient security for whatever you...

Well they're not 'Arduino' functions but ESP-IDF functions are accessible within the Arduino framework. They will work fine in Arduino IDE, for example.

I forgot to mention you'll need this though: #include "driver/rtc_io.h"

I have a very similar project to you and I'm having a terrible time with WPA2 connection speed. Even if I set the channel, it seems to have these unexplained 'windows' where it can connect. These are, approximately: 1100-1250ms, 2200-2300ms, and occasionally above that with the same increasing inter...

Yeah you want WiFi in AP or APSTA mode, a web server running that serves up a configuration page and parses the submitted form, and ideally a captive DNS portal so users connecting to the access point are automatically redirected (though this is a bit wonky nowadays with SSL everywhere). It's for Ar...

Are you trying to do this while in deep sleep? Because I recall it also says somewhere there that you can't do so.

Drive the data in pin HIGH on sleep.
I guess you'll need to make sure it's a RTC GPIO.

It's not really an issue, or anything particular to Core0*, it's a reasonable outcome within the constraints of running a single-threaded webserver on a tiny MCU with many concurrent requests. If you were to have a HTML page that redirects and then calls for loading external images, javascript, and ...