NRF54 (MCUMGR): Undefined reference to `smp_bt_register'

[Alex P]

Dear Team,

I am trying to use smp_bt_register and smp_bt_unregister calls in order to add/remove BLE SMP characteristic in real-time.

However, I keep getting 'undefined reference to `smp_bt_register' error during linking no matter what.

Here are MCUMGR related keys defined in my prj.conf:

CONFIG_MCUMGR=y

CONFIG_ZCBOR=y

CONFIG_MCUMGR_GRP_IMG=y

CONFIG_MCUMGR_GRP_OS=y

CONFIG_MCUMGR_TRANSPORT_BT=y

CONFIG_MCUMGR_TRANSPORT_BT_DYNAMIC_SVC_REGISTRATION=y

Please help. 

Thanks

WBR,

Alex

[Einar Thorsrud]

Hi Alex,

I see you have CONFIG_MCUMGR_TRANSPORT_BT_DYNAMIC_SVC_REGISTRATION, so I am not immediately able to explain this. Which SDK version are you using, and can you check in the generated .config that CONFIG_MCUMGR_TRANSPORT_BT_DYNAMIC_SVC_REGISTRATION is actually set for the build?

Br,

Einar

[Alex P]

Hi Einar,

I am on v.3.0.1 of SDK.

I have checked zephyr/.config and CONFIG_...SVC_REGISTRATION is neither set nor mentioned in it. 

Can it be that it needs some additional/missing config parameter to become active?

Thanks

WBR,

Alex

[Einar Thorsrud]

Hi Alex,

I see. Then some of the dependencies is not met, and you should have seen a warning about it in the build log. Looking at your list of configs again I see you do not have CONFIG_BT_GATT_DYNAMIC_DB=y, but that is needed.

Br,

Einar

[Alex P]

Yes, it now worked! Thanks for your help!