https://devzone.nordicsemi.com/f/nordic-q-a/2324/s110-api-variables-questionsIn the nRF51 SDK examples, some pass the parameter adv_params off the stack as a locally declared vaiable in the context of the function and some pass static global variables. For this API, and others, which is correct (or are both valid, i.e., theen-USTelligent Community 13Thu, 24 Apr 2014 14:33:06 GMThttps://devzone.nordicsemi.com/thread/9596?ContentTypeID=1Thu, 24 Apr 2014 14:33:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b4fb2867-3501-4500-9785-c5de6c2035a9Ulrich Myhre<p>The SoftDevice will copy all the data it needs for API calls. Some calls will have in/out or out-values you might want to keep around or double-check against (lengths written, attribute handles assigned, etc.), but this is up to you.</p> <p>(In the few cases where pointers have to live for a while, the SoftDevice would have to send you a heads-up when memory can be freed. This is currently done when handling long writes, using <a href="http://devzone.nordicsemi.com/documentation/nrf51/5.2.0/html/a00878.html">MEM_REQUEST</a>.)</p><div style="clear:both;"></div>