These are questions you should pose to the event organizers (which event are you planning to compete in?) and the rules guys of that event. They are the ones that will check your car for compliance with the rules and they are the ones that provide this "data accumulator", so they should know how it will be working.

For the steering sensor question, Tobias Michaels is quite active in this forum and he is an electrical rules guy, he will be able to answer this question at least for the Formula Student Germany event.