RE: BLE address no longer matches FICR->DEVICEADDR in NCS v3.x

Einar Thorsrud — Tue, 18 Nov 2025 18:42:40 GMT

Hi,

[quote user=""]Why was FICR->DEVICEADDR removed in NCS v3.x?
Previously, it corresponded to the BLE public address burned into FICR.[/quote]

It has not been removed. This is part of the SoC itself, and the macros you use for accessing it also exists. Could it be that you have made some other changes while migrating and is now trying to read this from the application core? Note that the DEVICEADDR register only exist in the FIRC for the network core and can only be accessed like this from the network core.

[quote user=""]Is the BLE controller in NCS v3.x no longer using the FICR DEVICEADDR as the identity address?[/quote]

It can still be used as the identity address.

[quote user=""]What is the correct way to obtain the BLE public (identity) address in NCS v3.x?
Should we use bt_id_get() exclusively?[/quote]

Yes, that is more portable and generic. This also works also if another identity address is used (say another random static address or a public address).

[quote user=""]Is there an official statement or migration note explaining this change?[/quote]

I do not think so, and the DEVICEADDR from FIRC can still be used.