https://devzone.nordicsemi.com/f/nordic-q-a/101347/ncs-2-4-0-sample-direction_finding_connectionless_tx-how-to-add-connection-to-dfu-and-pheriphal-uartthanks! I used the sample &quot;direction_finding_connectionless_tx&quot; can work well, my cellphone can scan it (nrf connect mobile app), but now I want to add more functions into this sample, such as, DFU, NUS and so on, but how can I do? I copy some codesen-USTelligent Community 13Fri, 30 Jun 2023 08:59:08 GMThttps://devzone.nordicsemi.com/thread/433875?ContentTypeID=1Fri, 30 Jun 2023 08:59:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bd6859e1-5305-41b8-bccf-b17cfd395e32Simonr<p>Hi</p> <p>First off, I&#39;m not sure how much sense it makes to use the Direction Finding TX sample to connect to a phone. You won&#39;t get usable IQ data to find the direction of the device accurately without an antenna array that receives data at different angles.</p> <p>Error message -12 points to the application being out of memory, so I&#39;m afraid the nRF52833 is maxed out in terms of flash memory, as the Direction Finding application takes quite a bit of space and so does DFU, and the nRF52833 only has 512 kB of flash and 128kB of RAM available. When building the application in NCS, does it say anything about how much&nbsp;of the RAM and Flash memory your application is using?&nbsp;</p> <p>You can try removing stuff like debug logging etc. to use less of the memory and see if that helps by removing unnecessary features from the project configs.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>