No license information whatsoever in the entire repo. Not worth my time if I cannot legally use this.

I will in any case add a more visible LICENSE file, thank you for your support

Ciao majewsky you can find the lincense in every file! It is Apache 2.0

I looked at some of the files, and didn't see the license anywhere. It's curious that I didn't check the .h files in the root dir; I just saw that they have license information in them. Sorry about that.

Kind of reminds me of CAN BUS.

What is this trying to replace and why?

Quoting the README:

   > It is a valid alternative to i2c, 1-Wire, Serial and other Arduino compatible protocols.

Yes can act as an alternative, but many of its feature are quite unique. For example it enables the user to use the same protocol on different media, with the same few lines code.

I would say that there is no Arduino compatible alternative to PJON for now, or I didn't find it, so I would say it is something new.