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By Legantmar
#78507 There is a direct dependence on the number of LEDs in the WS2812FX() class and the stability of WI-Fi in the access point mode. (in client mode, stability is much higher.).
Why ?? :(
My simplified code in attachment
https://yadi.sk/d/Mg9UCTbJfZgvng

Note: the start page address is 192.168.4.1
1) no LED strip is needed to check the sketch
2) before uploading the sketch, first upload the data (from the data folder)
3) I am using an older ws2812fx slightly modified (attached)
4) to check free memory-192.168.4.1/mem

Problem - Wi-Fi suddenly falls off in access point mode:
1) when loading web pages
2) when you turn on the buttons on the start page
3) the problem is stronger/faster manifested, the higher the LED_COUNT value for the WS2812FX class()
LED_COUNT = 600 - web pages can not be loaded at all. Wi-Fi falls off right away
LED_COUNT = 100 - it may seem that everything is fine, but after a while (the number of requests, connections), Wi-Fi also falls off.
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By QuickFix
#78510 Without even having had a glance at your code: what's the hardware set up like, especially the power supply side?
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By Legantmar
#78511
QuickFix wrote:Without even having had a glance at your code: what's the hardware set up like, especially the power supply side?

I have very good power supply Mean well 3A 5V and AMS1117-3.3 800mA
my sketch works well only in STA mode, but I have a problem in AP mode
I am try use any esp8266-12F (E and S) and any power supply

But I use old adafruit_neopixel library. I want to try upgrade this library today later.