I am working on aftermarket Canbus nodes for RV''s that don't have Can . once I get the info i need to spit data out through WSP hardware, I will be offer some notes per the RV-C spec that you can use. The nods use the Maple STM32 development board for building and testing. It has a Can bus built into the board. The hardware is in a Din Rail Enclosure for mounting. BTW I have a 1950 Fageol that has 32 Can bus nodes I built.