So, I will make believe you don't know shyte, and start afresh. If two modules are talking to each other, you are on SPI standard, and any elm chip can handle that as long as it is in line with an RS factor which I think I read started back in 1962.
Link here for that also.
Soo, in principal, this is an active cooking hack much like a lunar landing module per say. Intellectuals I invite at this point cuz I am almost talking out of my arse @ this point, so much this stuff amazes me.