A8 lost network connection via LAN

[Dizhuster]

suggest you test by wifi, if wifi is ok, maybe you need re weld your ethernet chip: LAN8720A

I'm not sure yet, but it seems to have worked. I connected the module to wi-fi, and it works for almost an hour without disconnections. If this does not work for a long time, you will have to buy a new module. Thanks for the help!))