I'm very encouraged by your report of success! Which is why I resurrected this thread instead of starting a new redundant one about CoreS3 and LAN Base.

Could you please list the libraries you include to make this work, and perhaps your setup code? My application requires static IP address, with no DNS, or DHCP available on the network.

I just bought LAN Base W5500 V12 and a CoreS3-SE. The schematics for LAN Base and LAN Module look the same regarding connection to the M5 bus. The doc for LAN PoE base mentions a conflict for the INTn pin and some CoreS3 integrated peripheral--is that relevant, or does it just mean I can't use the alternate device that is also hardwired to the bus pin?

I've tried 4 different example programs in the Arduino\libraries and downloaded from M5stack github. A couple don't work because they use a SPI library that uses VSPI. Also tried to piece together something using these as guides, and to try default Arduino Ethernet.

I haven't been able to reach/initialize the LAN module with many attempts.

Thank you!

M5CoreS3 SE + LAN Module with W5500 V12 work so far,
also the RS-485 is now working with ESP-IDF 5.3,

but the Screws are quite short. 2x socket head screw M3x28 included, but M3x32 are fitting.

Thanks,
Franz

with the DEMO App, it does not start, but you can boot by USB, and then switch it on the Power Page.
with Custom Apps, unless you reconfigure it, it boots up.

my M5CoreS3 (non SE) starts up ok from a stacked LAN module powered via 24 V DC jack. So I'd say it should work with an M5CoreS3 SE as well.

Thanks
Felix