https://devzone.nordicsemi.com/f/nordic-q-a/26712/softdevice-updateHello, when a bootloader wants to update the softdevice, I think it has to first store the SD binary somewhere in flash memory and then to use sd_mbr_command to ask the master boot record to copy the SD to its final destination. Right? I guess thisen-USTelligent Community 13Tue, 14 Nov 2017 19:09:47 GMThttps://devzone.nordicsemi.com/thread/105054?ContentTypeID=1Tue, 14 Nov 2017 19:09:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6cbc3101-907f-4c82-8cee-4e349ed524d9Torsten Robitzki<p>Ups, sorry! I&#39;ve missed that you were responding. Thanks a lot for confirming my thoughts! :-)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/105053?ContentTypeID=1Wed, 08 Nov 2017 16:16:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c938ad4c-4b06-401e-abc9-e6594936b01fHung Bui<p>Hi Torsten,</p> <p>I assume you are making your own bootloader, not using ours. And you are correct, the bootloader/application need to ask the mbr to swap the softdevice. And when you call sd_mbr_command() with SD_MBR_COMMAND_COPY_SD command to swap, you swap only the softdevice starting from 0x1000. The MBR stays.</p><div style="clear:both;"></div>