zephyr/samples/bluetooth/direction_finding_connectionless_rx/README.rst
Martí Bolívar ef54f3d5ce doc: samples: bluetooth: DFE fixes
The documentation for Bluetooth Direction Finding Extension (DFE)
samples has various issues:

- references to 'child' images, which do not exist in mainline zephyr

- invalid RST syntax: there are missing ` characters to end arguments
  to :zephyr_file: roles, creating unintelligible output

- incorrect RST usage:

   - using :zephyr_file: instead of :file: when referring to a file
     that the user must create, creating broken links to nonexistent
     files in the zephyr tree

   - using :code: instead of :kconfig: to refer to kconfig options,
     creating output without links to the help for those options

- redundant or duplicated information

- grammar, typos, various bits and pieces

Clean this up. As part of that, move various common bits and pieces of
information to the devicetree bindings index so they can just be
linked to from the sample docs.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Signed-off-by: Piotr Pryga <piotr.pryga@nordicsemi.no>
2021-08-17 17:52:43 -04:00

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.. _bluetooth_direction_finding_connectionless_rx:
Bluetooth: Direction Finding Periodic Advertising Locator
#########################################################
Overview
********
A simple application demonstrating the BLE Direction Finding CTE Locator
functionality by receiving and sampling sending Constant Tone Extension with
periodic advertising PDUs.
Requirements
************
* Nordic nRF SoC based board with Direction Finding support (example boards:
:ref:`nrf52833dk_nrf52833`, :ref:`nrf5340dk_nrf5340`)
* Antenna matrix for AoA (optional)
Check your SoC's product specification for Direction Finding support if you are
unsure.
Building and Running
********************
By default the application supports Angle of Arrival and Angle of Departure mode.
To use Angle of Departure mode only, build this application as follows,
changing ``nrf52833dk_nrf52833`` as needed for your board:
.. zephyr-app-commands::
:zephyr-app: samples/bluetooth/direction_finding_connectionless_rx
:host-os: unix
:board: nrf52833dk_nrf52833
:gen-args: -DOVERLAY_CONFIG=overlay-aod.conf
:goals: build flash
:compact:
To run the application on nRF5340DK, a Bluetooth controller application must
also run on the network core. The :ref:`bluetooth-hci-rpmsg-sample` sample
application may be used. To build this sample with direction finding support
enabled:
* Copy
:zephyr_file:`samples/bluetooth/direction_finding_connectionless_rx/boards/nrf52833dk_nrf52833.overlay`
to a new file,
:file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.overlay`.
* Copy
:zephyr_file:`samples/bluetooth/direction_finding_connectionless_rx/boards/nrf52833dk_nrf52833.conf`
to a new file,
:file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.conf`. Add
the line ``CONFIG_BT_EXT_ADV=y`` to enable extended size of
:kconfig:`CONFIG_BT_BUF_CMD_TX_SIZE` to support the LE Set Extended Advertising
Data command.
Antenna matrix configuration
****************************
To use this sample with Angle of Departure enabled on Nordic SoCs, additional
configuration must be provided via :ref:`devicetree <dt-guide>` to enable
control of the antenna array.
An example devicetree overlay is in
:zephyr_file:`samples/bluetooth/direction_finding_connectionless_rx/boards/nrf52833dk_nrf52833.overlay`.
You can customize this overlay when building for the same board, or create your
own board-specific overlay in the same directory for a different board. See
:dtcompatible:`nordic,nrf-radio` for documentation on the properties used in
this overlay. See :ref:`set-devicetree-overlays` for information on setting up
and using overlays.
Note that antenna matrix configuration for the nRF5340 SoC is part of the
network core application. When :ref:`bluetooth-hci-rpmsg-sample` is used as the
network core application, the antenna matrix configuration should be stored in
the file
:file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.overlay`
instead.