@martinnn lib_imu is a library that I wrote and in this function give only data from IMU and there aren't any delay. if I wrote data immediately on a file.txt in SD card it employ 0,2 s so the sample became 0,4. but if I collect data and insert them in a list to save data at the end of acquisition it gives me the error 'Memory allocation'.

@robert-hh said in Wipy 2.0 and save data on my pc, not in flash memory: Which BN055 module I was asking about the vendor and make of the BNO055 board.

@robert-hh Thank you so much for your time. I made some changes and now my program works fine.

@livius FW of the SD card should prevent corruption of file system of the card if power fail happens during writing. How this is achieved I don't know.