Why a homebrew communication protocol?
The most important reason is costs. Ethernet, CAN, RS485 etc would cost more to implement than my solution. I do not say my protocol is better, probably it is not. But it is cheaper to implement over all. Second reason is complexity. Ethernet and CAN for example are not easy protocols (yes I have worked with these on detailed level). I wanted it to be understandable for everyone. Another reason is that I wanted that to network would be topology free, and (virtually) unlimited of size. This rules out a lot of bus systems too.
