https://devzone.nordicsemi.com/f/nordic-q-a/13801/how-to-calculate-speed-and-cadence-of-ble_app_rscs-samspleHi, I use nrf51422 and integrated BMA250E for Pedometer, Now I can count the step but I dont how to calculate the speed, cadence and stride length like below static void rsc_sim_measurement(ble_rscs_meas_t * p_measurement) { p_measurement-&gt;is_inst_stride_len_presenten-USTelligent Community 13Thu, 12 May 2016 23:10:01 GMThttps://devzone.nordicsemi.com/thread/52747?ContentTypeID=1Thu, 12 May 2016 23:10:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1f9439d1-95fc-4642-967a-9c20ddaa685aVincent<p>OK, Thanks a lot.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/52746?ContentTypeID=1Thu, 12 May 2016 13:06:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a09d17c1-42cd-42d7-8555-b21ad009f7d7Kenneth<p>Hi, this will be manufacturer specific, and depends on which sensors you have available. Once you have the stride length and cadence, then you can calculate the speed. If you have a GPS you can calculate the stride length from the speed and cadence. Or the stride length might be manually set or calibrated by the user. I guess you might find some useful information <a href="http://www.dcrainmaker.com/2013/05/polar-bluetooth-footpod.html">here</a>.</p><div style="clear:both;"></div>