Multiple Arduino on a machine

GoForSmoke:
Possibly the OP can better explain in the OP's native language. That wasn't American Millennial in the first post, too many words were not 1337-spelled.

it is a shame, we just love to play the pronoun with adjectives game.
I wonder if there is some point in one's life when they become enlightened and learn to ask proper question and to think rationally.
In my humble view, any post that selects parts before stating a goal, has one foot solidly in an X/Y Problem.
It would seem that thinking the problem through once requires experience. and experience comes with failure.
like the old chicken and the egg delima.
... and to run a bit off... there was a Halloween party at the college frat house. a young lad was dressed as a chicken.
and a young lass was costumed as an egg. they laughed and hung out for a bit, then they hooked up...
and well, there were able to answer that age old quandary.