https://devzone.nordicsemi.com/f/nordic-q-a/26214/how-to-create-persistent-variableI want to keep the value of the variable even if there is power interruption or reset in the system. That&#39;s why I want to create persistent variable in main. Do I need to use pstorage for this, or can I define a custom global variable like persistenten-USTelligent Community 13Tue, 24 Oct 2017 08:15:33 GMThttps://devzone.nordicsemi.com/thread/103238?ContentTypeID=1Tue, 24 Oct 2017 08:15:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a17e70bc-b35e-434b-9c6d-425deb1eb5ebpurgoufr<p>I read <a href="http://www.newtonlabs.com/ic/ic_5.html#SEC9">this link</a> .That&#39;s why I said persistent variable in C. Frankly, I never use it. I will be back after searching fstorage and fds libraries.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/103237?ContentTypeID=1Tue, 24 Oct 2017 07:30:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5bff088-a7bb-499a-8a7b-fc636025e487emdi<p>There are no &#39;persistent&#39; variables in C.</p> <p>You might use a library or a machine register for that, depending on your needs and what version of the SDK you are using.</p> <p>In the more recent versions of the SDK there are two libraries for that: fstorage and fds.</p><div style="clear:both;"></div>