If you are experienced with the CoreMotion API and understand the code displayed on this website -> <[url removed, login to view]>
you will have no problems to do this job. Because the code on this website is already what I need. I only need some adjustments of that code.
What I need is a code that is receiving the rotationRate.z data together with the depending timestamp in a frequency of 90 per second. That is all!
As far as I know the displayed code is exactly doing this job but I want a code that is restricted to the minimum. So I do not need values from the acceleration sensors and I do not need the values for rotationRate.x and rotationRate.y. I only need rotationRate.z and the timestamp.