Arduino for STM32

Sorry to disturb, I some tests with the python board and became stuck because of memory issues :
I put a funtion in the main program, it works like a charm,
I moove it to a secodary program, serving as a library, the functions isn't found
Well I tried a complete reset, but I would like to keep a ...

Thanks for the quick answer, and sorry for not having checked sooner.
As a mater of facts, I could go with the python board (simpler as most of the code and the pcb are already made from my previous project)
But I will be limited in terms of calculations possible / measuring cycle :
I will need to ...

Good morning/evening to everyone. to those that will spare time to read this, you already have my thanks.
As a little exprerienced beginner in programmed electronics, I have the following problem :
I need to read in real time the data from 4 different accelerometers (MPU6050 as they are collecting ...