SDK 15.3 Secure BLE DFU examplehttps://devzone.nordicsemi.com/f/nordic-q-a/50750/sdk-15-3-secure-ble-dfu-exampleWe were running BLE DFU bootloader for nrf52832 based on sdk 14.2; this worked fine. We have now moved to sdk15.3 and nrf52840 as we needed USB.Our applicaton is up and running BLE, USB and all; now we are upgrading bootloader for SDK and HW changesen-USTelligent Community 13Wed, 07 Aug 2019 15:45:38 GMTRE: SDK 15.3 Secure BLE DFU examplehttps://devzone.nordicsemi.com/thread/202894?ContentTypeID=1Wed, 07 Aug 2019 15:45:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9f77cd49-496b-453d-99e1-0237b6eb5e01OwainIncus<p>replaced the sprintf and reduced size by 2k; advertising OK now.</p><div style="clear:both;"></div>RE: SDK 15.3 Secure BLE DFU examplehttps://devzone.nordicsemi.com/thread/202892?ContentTypeID=1Wed, 07 Aug 2019 15:32:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:aad8e392-a7e1-4ed9-81c3-c2e9ce38db9bOwainIncus<p>documentation seems to indicate f8000-fe000 reserved for bootloader; yet I think we exceed this by approx 0.4k; yet no break of build and error indicated at link stage?</p> <p></p> <p>suspect a sprintf I added to code has caused a load of library code to be included.</p><div style="clear:both;"></div>