direction_finding_connectionless_tx on nrf52811

[meterman]

NCSv3.2.4

Is AoA CTE supported in the nrf52811 ?

Product page https://www.nordicsemi.com/Products/nRF52811 says "The nRF52811 SoC supports Bluetooth LE, and is capable of Bluetooth Direction Finding" but the support "AI" says it is not supported.

I can build and run with nrf52833-DK, I am attempting to use the uBlox BMD-360-EVAL (nrf52811) with the direction_finding_connectionless_tx sample project.

Terminal output

*** Booting nRF Connect SDK v3.2.4-4c3fc0d44534 ***
*** Using Zephyr OS v4.2.99-9673eec75908 ***
Starting Connectionless Beacon Demo
Bluetooth initialization...[00:00:02.691,040] <inf> bt_sdc_hci_driver: SoftDevice Controller build revision:
                                            82 ba ca d0 7d 8d 3c 96  b0 70 10 27 3b 6d 90 6a |....}.<. .p.';m.j
                                            04 73 90 4f                                      |.s.O
[00:00:02.693,603] <wrn> bt_hci_core: opcode 0x2058 status 0x11
[00:00:02.693,634] <err> bt_df: Failed to read antenna information
failed (err -5)

ubx_bmd360eval_nrf52811.conf is same as nrf52833dk_nrf52833.conf

Board "ubx_bmd360eval/nrf52811" has been added to sample.yaml

ubx_bmd360eval_nrf52811.overlay is  empty file.

Build command 

west build -p auto -b ubx_bmd360eval/nrf52811

-----

I am able to get advertisement operating without the AoA CTE by setting 

prj.conf

CONFIG_BT_DF=n

CONFIG_BT_DF_CONNECTIONLESS_CTE_TX=n

bx_bmd360eval_nrf52811.conf

CONFIG_BT_CTLR_DF=n

Disable calls to bt_df_set_adv_cte_tx_param() and bt_df_adv_cte_tx_enable() in main.c

[Elfving]

Hi, and sorry about the mixed signals there.

So the '811 should support transmitting, but not receiving. I guess this is often simply referred to as it not supporting direction finding.  

So I think you running the direction_finding_connectionless_tx sample project on it should work. I guess there could be something at fault with the boardfiles etc., are you able to get anything else to run that uses radio?

Regards,

Elfving

[PaKa]

Note that the nRF52833 is the only nRF device which has a Bluetooth qualification enabling Direction Finding so if you plan to certify your product then that is the only option.

[meterman]

Elfving I am able to get the radio operating with an extended advertisement, by setting DF configs

CONFIG_BT_DF=n

CONFIG_BT_DF_CONNECTIONLESS_CTE_TX=n

CONFIG_BT_CTLR_DF=n

And changing main.c to NOT call 

bt_df_set_adv_cte_tx_param()

bt_df_adv_cte_tx_enable()

[meterman]

Good to know. We'll continue with the nrf52833, this is for an early stage PoC.

[Elfving]

Sounds odd.

Are you enabling overlay-bt_ll_sw_split.conf as well?

This should ofcourse work with this board, but do you have any other Nordic DKs on hand, just so we could compare with something that I happen to have on hand as well?

Regards,

Elfving