[colanderman]

Hah! I was literally about to open up my nascent userland AX.25 stack. Is yours open-source, or would you mind sharing? (My e-mail is in my profile.) I want to get something running on an ESP32-S3. My goal is to turn a Cardputer into a companion TNC console for my Kenwood TH-D74.

[xantronix]

It is technically! I sent you an email. It's very POSIX-y, unfortunately, but if you were to make some sort of shim for file descriptors (big ask heh) you would be able to use it just fine.