https://devzone.nordicsemi.com/f/nordic-q-a/124769/bootloader-ota-in-single-blockHi team , I have developed the code where i am able to do OTA in dual slot when my application size is less , but my current application size is aprx. 260 KB and i want top do OTA in single block without using 2nd block , please find my proj.conf foren-USTelligent Community 13Fri, 03 Oct 2025 14:11:02 GMThttps://devzone.nordicsemi.com/thread/550604?ContentTypeID=1Fri, 03 Oct 2025 14:11:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:574f80a3-74cb-4f8a-a49f-62bd86acc6afAmanda Hsieh<p>Hi,&nbsp;</p> <p>BLE <span>FOTA</span> cannot support single-bank updating.</p> <p>Please consider&nbsp;<span>Serial Recovery (see this Devacademy course</span>&nbsp;<a href="https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-9-bootloaders-and-dfu-fota/topic/exercise-1-dfu-over-uart/">https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-9-bootloaders-and-dfu-fota/topic/exercise-1-dfu-over-uart/</a>)&nbsp;<br />DFU with added external flash (<span>see this Devacademy course&nbsp;</span><a href="https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-9-bootloaders-and-dfu-fota/topic/exercise-3-dfu-with-external-flash/">https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-9-bootloaders-and-dfu-fota/topic/exercise-3-dfu-with-external-flash/</a>), or <a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/test_and_optimize/optimizing/memory.html">Memory footprint optimization</a>.</p> <p>Regards,<br />Amanda H.&nbsp;</p><div style="clear:both;"></div>