01-01-2020, 11:01 AM
Thanks for the info. Could you try if you get data when starting the measurement and then rotating and moving the phone a bit? Since the acceleration without g is a virtual sensor that fuses data from the accelerometer and the gyroscope, the iPhone sometimes needs to collect some data first to find a starting point. This is done in the system, so we simply do not get any data before the iPhone is ready. Could you try starting the measurement and move and rotate the phone a bit to see if this is the case?