https://devzone.nordicsemi.com/f/nordic-q-a/68245/how-to-change-mac-address-when-device-enters-dfu-modeI was able to change the MAC address in the ble_app_buttonless_dfu example with &quot;sd_ble_gap_addr_set( )&quot;. But, when I enter the DFU mode, the MAC address changes to the default in the FICR. How can I change the MAC address again? Should I change theen-USTelligent Community 13Thu, 12 Nov 2020 13:18:53 GMThttps://devzone.nordicsemi.com/thread/279734?ContentTypeID=1Thu, 12 Nov 2020 13:18:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e4c4ae83-d5bd-4c65-ab15-fad5ef73939dGabriel Jiro <p>Thank you for your help, Hung&nbsp;<span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/1f600.svg" title="Grinning">&#x1f600;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/279696?ContentTypeID=1Thu, 12 Nov 2020 12:05:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e12cb2f3-b89d-45f6-b809-97cbaec3bfd0Hung Bui<p>Hi Gabriel,&nbsp;</p> <p>When switching to DFU mode the softdevice need to be reinitialize and the address will be set to default one by the botloader.&nbsp;<br />If you want to change to a fixed one, you can change that in the bootloader.</p> <p>Note that in our bootloader it&#39;s automatically change to the default address + 1 to avoid bonding issue. Please have a look at&nbsp;gap_address_change() function.&nbsp;</p><div style="clear:both;"></div>