https://devzone.nordicsemi.com/f/nordic-q-a/77719/change-the-advertise-name-for-dfu-in-application-with-bondsHi everyone, I am using nrf52840 and I want to change the advertising name in bootloader from &quot;DFUTarg&quot; to a custom name on application side. For unbonded one, I saw there&#39;s a function called &quot;nrf_dfu_set_adv_name&quot;, but in bonded one, there&#39;sen-USTelligent Community 13Thu, 22 Jul 2021 08:41:19 GMThttps://devzone.nordicsemi.com/thread/321262?ContentTypeID=1Thu, 22 Jul 2021 08:41:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4027749d-56a2-426d-9603-562fdfab64c9Hung Bui<p>&nbsp;Hi RJ,&nbsp;</p> <p>Originally we don&#39;t have such function for bonded DFU because the peer can simply use the same address from the peer to re-connect. So it doesn&#39;t really matter which advertising name the bootloader advertise. Usually the period when the bootloader advertise and the phone re-connect to the device is very short, almost instantly so end user may not even aware of the advertising name of the bootloader.&nbsp;<br />Only when in no-bonding DFU, where the address may be changed, the advertising name could be used to recognize the device.&nbsp;</p> <p>So if you still need to change advertising name in bootloader when doing bond DFU, you would need to implement the API to change name (nrf_dfu_set_adv_name) into both ble_dfu_unbonded.c in the application and modify nrf_dfu_ble.c in the bootloader.</p><div style="clear:both;"></div>