[SV_BubbleTime]

Entire chip has 512K of rom, if I could have fit IP I would have considered it, but I was already really quite cramped for room! I’m sure there are some tight IP systems but I’m already mesh/proxy-ing stuff, it was easier to just encapsulate.

[m_eiman]

There are small IP stacks, I use this one and it’s been working well: http://savannah.nongnu.org/projects/lwip/

Might still be too big if your other code is large, of course, but I use it comfortably on a 512 kB device.

[yc-kraln]

I've done NB-IoT in 32K of ROM... 512K is a luxury :)