This is worth a look as works over packet radio.

https://github.com/markqvist/Reticulum

Also:

https://discord.gg/Ay7tj7w4

Thanks for info, but I do NOT need network stack. I have my own, I can build my own. I need decent hardware, because I lack knowledge and skills here. Also, its not an interesting stuff to me to play with DSPs and all that stuff really.