https://devzone.nordicsemi.com/f/nordic-q-a/18693/understanding-soft-deviceHello, I am a bit lost, after concluding the application part of my project I try to approach the ble part. I read the &quot;Getting started with bluetooth low energy &quot; and got some basic understanding on profiles and protocols but i cant make the jumpen-USTelligent Community 13Mon, 02 Jan 2017 01:45:10 GMThttps://devzone.nordicsemi.com/thread/72173?ContentTypeID=1Mon, 02 Jan 2017 01:45:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:90974802-5062-489c-ab38-9a2ce6115d6bMichael Antwih<p>Most likely the SD will come pre-installed on the Primo board. If you can get through the ble_central and ble_peripherals examples then you are basically pretty far in learning the SD.</p> <p>The SD itself is just a pre compilied library which handles the BLE stack and radio events. It allows us to not have to worry about the lower level details of interfacing with the radio. The SD&#39;s are also pre-certified with the BTSIG so you know they will be compliant.</p> <p>I would suggest getting a grasp on the ble roles (central / peripherals) more so than understanding the softdevice at this point. The SD understanding will come but since it is close source having the understanding of how you interface with it would be good path to go down.</p> <p>Good luck in your coding!!</p><div style="clear:both;"></div>