https://devzone.nordicsemi.com/f/nordic-q-a/106686/undefined-reference-to-mbedtls-functionsHi all! So I&#39;m trying to use mbedTLS methods in my project. I got it to work on SDK v1.9.0 but when upgrading to v.2.4.0 I get a lot of &quot;undefined references&quot; to methods regarding mbedTLS. I see that there is some other issues regarding this but thoseen-USTelligent Community 13Mon, 18 Dec 2023 10:30:49 GMThttps://devzone.nordicsemi.com/thread/460775?ContentTypeID=1Mon, 18 Dec 2023 10:30:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:58d6e040-eb51-439b-98bf-e0da7a9a2092Susheel Nuguru<p>Porting any project from NCSv1.9.0 straight to NCSv2.4.0 will be hectic port efforts. There are 5 major version changes with API and config changes in each major version. There is no simple way to help&nbsp;</p> <p>There was one other user trying to do similar upgrade and there seems to be a solution adding systick in the dts files. You can find that thread <a href="https://devzone.nordicsemi.com/f/nordic-q-a/97170/mbedtls-configuration-socket-issue-migrating-from-1-8-0--2-2-0-nrf-connect">here</a>.</p><div style="clear:both;"></div>