Configuring the Microbit v2.21 for AoD

RE: Configuring the Microbit v2.21 for AoD

tesc — Fri, 01 Dec 2023 14:38:14 GMT

Hi,

The Zephyr Controller is the BLE controller from Zephyr. nRF Connect SDK builds on top of Zephyr, but we deliver our own BLE controller, named the SoftDevice controller, which is the default controller used for all BLE samples. To use the Zephyr Controller instead, set CONFIG_BT_LL_SW_SPLIT=y in the prj.conf of your project.

See the Bluetooth LE Controllers section of the nRF Connect SDK documentation for more information.

Regards,
Terje

RE: Configuring the Microbit v2.21 for AoD

HansLarsen — Tue, 28 Nov 2023 19:36:19 GMT

With SDK v2.1.4 i get this error which appears to be the same as before, though now its giving me error -5.
In the kconfig guy i've changed the Bluetooth Like Layer Selection to be Software-based BLE Link Layer, which is the zephyr controller, as i understand it.

RE: Configuring the Microbit v2.21 for AoD

HansLarsen — Fri, 24 Nov 2023 13:28:12 GMT

It does not say this on the example page?

Could you clarify what the difference between the zephyr and nrf controller is? I can select both in vscode when copying an example? Or is it something else?

I'll try down grading to the tool chain version 2.1. Thank you for the help.

RE: Configuring the Microbit v2.21 for AoD

HansLarsen — Fri, 24 Nov 2023 13:25:39 GMT

Hey, yes I'm running the unmodified example, and vscode appears to be generating the overlay AOA by itself.

And yes I'm selecting the microbit board from the build menu.

RE: Configuring the Microbit v2.21 for AoD

tesc — Fri, 24 Nov 2023 13:13:47 GMT

Hi,

For CTE RX you must use the Zephyr Controller, not the SoftDevice Controller. For the Zephyr Controller you must use nRF Connect SDK v2.1, and not v2.5 as you use here.

Regards,
Terje

RE: Configuring the Microbit v2.21 for AoD

tesc — Thu, 23 Nov 2023 16:38:37 GMT

Hi,

Thank you for the clarifications. Your setup looks right.

I assume that you followed the instructions, and built the project in AoA mode (basically set OVERLAY_CONFIG to the overlay-aoa.conf file, as per the Bluetooth: Direction finding peripheral documentation)?

I also assume that you configured the sample for the bbc_microbit_v2 board?

Can you clarify what you do to "configure the CTE response"? Are you simply referring to building and running the (unmodified) sample, and it fails at that point in code?

I do not have a BBC Micro:Bit v2 right now, but I will try to get hold of one to reproduce. In the mean time, answers to the above questions would be great.

Regards,
Terje

RE: Configuring the Microbit v2.21 for AoD

HansLarsen — Wed, 22 Nov 2023 22:08:26 GMT

Hej Terje, sorry for the confusion, let me see if i cant make it a bit clearer.
I have a PCA20054 direction finding atenna with a nrf52833dk_nrf52833, the PCA20054 and dk is running the "direction finding central" from NRF, this part seems to work fine.

Secondly i have a microbit V2.21, on the Microbit, i'm trying to run the "direction finding perphial" example, in the configuration of the example, i have disabled the direction finding antenna.

The "direction finding perphial" comes as far as establishing the bluetooth connection, however when i try and configure the CTE response, on the Microbit, i get the error from above, all the configuration and screenshots from above relates to the Microbit.

The problem mostly is that when the Microbit tries to configure a CTE response by calling bt_df_set_conn_cte_tx_param function, the Microbit hard crashes.

RE: Configuring the Microbit v2.21 for AoD

tesc — Tue, 21 Nov 2023 22:55:23 GMT

Hi,

I am afraid I am struggling a bit in understanding your setup.

You mention a micro:bit, an nRF52833 DK and an antenna array, which all are somehow connected. Is this by physical connections (wires,) and if so what pins/headers/etc. are connected to what?

Please note that there is no way to physically (by wires) connect "through" the nRF52833 DK, from a different board, to an antenna array in the other end. The normal way would be to use a direction finder sample on the nRF52833 DK with the antenna array connected (the side of direction finding requiring an antenna array), and then have the corresponding direction finding sample on the other device (the side of the direction finding using only one antenna.) Those two direction finding samples are different.

With your current setup:

What sample is put on what device (where by device I mean e.g. micro:bit, nRF52833 DK, etc.)?
What device has the antenna array, and what are the physical connections?
What antenna array are you using?

Regards,
Terje

RE: Configuring the Microbit v2.21 for AoD

HansLarsen — Tue, 21 Nov 2023 16:28:41 GMT

With this configuration:

#
# Copyright (c) 2022 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: Apache-2.0
#

CONFIG_BT=y
CONFIG_LOG=y
CONFIG_BT_DEVICE_NAME="DF Conn App"
CONFIG_BT_SMP=y

CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_APPEARANCE=833

# Enable Direction Finding Feature RX in connected mode
CONFIG_BT_DF=y
CONFIG_BT_DF_CONNECTION_CTE_TX=y
CONFIG_BT_DF_CONNECTION_CTE_RSP=y

CONFIG_BT_DF_CTE_TX_AOD=n