https://devzone.nordicsemi.com/f/nordic-q-a/111620/nrf5340dk-with-nrf21540ek-build-and-config-issueDear Nordic Team, We have tested that the nrf5340DK borad was ok for the broadcast audio source role. We want to add the nrf21540EK FEM borad on it to test the max broadcast distance. Although the nrf21540EK board is still on its way to us, we woulden-USTelligent Community 13Wed, 29 May 2024 12:22:35 GMThttps://devzone.nordicsemi.com/thread/486425?ContentTypeID=1Wed, 29 May 2024 12:22:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:898509a0-2a7d-494a-b678-13329da6d86cEdvin<p>Hello Tommy,</p> <p>The reason the network core is not affected by the nrf5340dk_nrf5340_cpunet.overlay is that the networ core&#39;s application is configured via the child_image folder.</p> <p></p> <p>Depending on what NCS version that you are using, the child image is called either hci_ipc.conf or hci_rpmsg.conf, found in the child_image folder in your application folder. (hci_ipc.conf for ncs v2.6.0 and later, hci_rpmsg.conf for older).</p> <p>If you want to add an overlay file, you can add a folder called &quot;boards&quot; in your application folder. In there you can place the file nrf5340dk_nrf5340_cpunet.overlay.</p> <p></p> <p>Then you can delete your build folder, and generate a new build configuration, to be sure that the compiler picks up the overlay files and configurations.</p> <p></p> <p>Best regards,</p> <p>Edvin</p><div style="clear:both;"></div>