Part of https://github.com/andreika-git/hellen-one family

https://docs.google.com/spreadsheets/d/1OiEaak7TElKwF-fXWvl9Dk-fD84a0NENe6lOwhXiOe4/

Inspired by https://github.com/rusefi/hw_88_bmw

https://github.com/rusefi/hw_microRusEfi

We shall start from https://github.com/rusefi/hellen121vag but using https://github.com/rusefi/hw_88_bmw shape and pinout.