Stolen HU. Retrofitted. Guide about coding world

[biosdi]

Guys, as I said in my intro thread, I drive a 2015 F36 420d. I've just been stolen of my HU, screen and Idrive; so, I've retrofitted a ID5/6 with touchscreen.

With the guy who I bought the HU and wiring from, I discovered that there's a world of coding behind a car.

So, I want to understand better the VO, FDL, ESYS, ISTA+ term.

Is there any guide out there? Someone can explain this?

I've found Bimmercode, but I understood that is a quite simple utility. I want to go deeper in detail of coding.

Thanks for help!