Secure Serial DFU: 2 UARTEs in Applicationhttps://devzone.nordicsemi.com/f/nordic-q-a/68194/secure-serial-dfu-2-uartes-in-applicationDear, I am trying to get secure serial DFU working on our custom board, which is connected to another controller through 2x UART(P0.02, P0.03, P0.30, P0.31) without HWFC. The secondary controller will recive the DFU packets from computer and shallen-USTelligent Community 13Thu, 12 Nov 2020 10:58:19 GMTRE: Secure Serial DFU: 2 UARTEs in Applicationhttps://devzone.nordicsemi.com/thread/279674?ContentTypeID=1Thu, 12 Nov 2020 10:58:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2e194f31-989a-47ec-b87c-ba3250fc3cbdtejaChintalapati<p>I noticed the Jump to bootloader didn&#39;t happen as expected and fixing that fixed this issue <span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/1f642.svg" title="Slight smile">&#x1f642;</span> Thanks Einar for the help. Appreciate it.</p><div style="clear:both;"></div>RE: Secure Serial DFU: 2 UARTEs in Applicationhttps://devzone.nordicsemi.com/thread/279569?ContentTypeID=1Wed, 11 Nov 2020 16:21:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ac76ab85-85be-471a-819a-3ef902169cf8Einar Thorsrud<p>Hi,</p> <p>I am sorry for the late reply.</p> <p>Did you have any progress on this?</p> <p>If not, I would say that generally it should not be a problem no matter what you do in the application before, as there is a reset before the bootloader. But you must put the device in DFU mode first.&nbsp;It is not clear to me if the&nbsp;application is still running on your device or&nbsp;if it has been reset and the bootloader entered DFU mode? Can you confirm?</p><div style="clear:both;"></div>