samples: Add Broadcast Assistant sample

First version of Broadcast Assistant sample
with hard coded selection of sink and source.

Signed-off-by: Lars Knudsen <[email protected]>

samples/bluetooth/broadcast_assistant/CMakeLists.txt

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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(broadcast_assistant)
+
+target_sources(app PRIVATE
+ src/main.c
+)
+
+zephyr_library_include_directories(${ZEPHYR_BASE}/samples/bluetooth)

samples/bluetooth/broadcast_assistant/Kconfig

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+# Copyright (c) 2024 Demant A/S
+# SPDX-License-Identifier: Apache-2.0
+
+mainmenu "Bluetooth: Broadcast Assistant"
+
+config SELECT_SOURCE_NAME
+ string "Selected Broadcast Source name"
+ default ""
+ help
+ Name of broadcast source device to select. This will be used as a
+ substring matched against both BT device name and broadcast name.
+ If empty, the first broadcast source found will be chosen.
+ Matching is not case sensitive.
+
+config SELECT_SINK_NAME
+ string "Selected Broadcast Sink name"
+ default ""
+ help
+ Name of broadcast sink device to select. This will be used as a
+ substring matched against the BT device name.
+ If empty, the first broadcast sink found will be chosen.
+ Matching is not case sensitive.
+
+source "Kconfig.zephyr"

samples/bluetooth/broadcast_assistant/README.rst

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+.. zephyr:code-sample:: bluetooth_broadcast_assistant
+ :name: Bluetooth: Broadcast Assistant
+ :relevant-api: bt_bap
+
+ Bluetooth: Broadcast Assistant
+
+Overview
+********
+
+Application demonstrating the LE Audio broadcast assistant functionality.
+
+The sample will automatically try to connect to a device in the BAP Scan Delegator
+role (advertising support for the Broadcast Audio Scan Service (BASS)).
+It will then search for a broadcast source and (if found) add the broadcast ID to
+the BAP Scan Delegator.
+
+This sample can be found under
+:zephyr_file:`samples/bluetooth/broadcast_assistant` in the Zephyr tree.
+
+Check the :ref:`bluetooth samples section <bluetooth-samples>` for general information.
+
+Requirements
+************
+
+* BlueZ running on the host, or
+* A board with Bluetooth Low Energy 5.2 support
+
+Building and Running
+********************
+
+The application will act as a broadcast assistant with optionally preconfigured
+filtering of broadcast sink and broadcast source names. By default, the application will
+search for and connect to the first broadcast audio sink found (advertising PACS and
+BASS UUIDs) and then search for and select the first broadcast audio source found
+(advertising a broadcast ID).
+
+Filter these by modifying the following configs:
+
+``CONFIG_SELECT_SINK_NAME``: Substring of BT name of the sink.
+
+and
+
+``CONFIG_SELECT_SOURCE_NAME``: Substring of BT name or broadcast name of the source.
+
+Building for an nrf52840dk
+--------------------------
+
+.. zephyr-app-commands::
+ :zephyr-app: samples/bluetooth/broadcast_assistant/
+ :board: nrf52840dk_nrf52840
+ :goals: build

samples/bluetooth/broadcast_assistant/prj.conf

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+CONFIG_BT=y
+CONFIG_LOG=y
+CONFIG_BT_CENTRAL=y
+CONFIG_BT_AUDIO=y
+CONFIG_BT_SMP=y
+CONFIG_BT_BUF_ACL_RX_SIZE=255
+CONFIG_BT_BUF_ACL_TX_SIZE=251
+CONFIG_BT_CTLR_SCAN_DATA_LEN_MAX=191
+
+CONFIG_BT_TINYCRYPT_ECC=y
+
+CONFIG_BT_EXT_ADV=y
+CONFIG_BT_BAP_BROADCAST_ASSISTANT=y

samples/bluetooth/broadcast_assistant/sample.yaml

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+sample:
+ description: Bluetooth Low Energy Broadcast Assistant sample
+ name: Bluetooth Low Energy Broadcast Assistant sample
+tests:
+ sample.bluetooth.broadcast_assistant:
+ harness: bluetooth
+ platform_allow:
+ - nrf52840dk_nrf52840
+ integration_platforms:
+ - nrf52840dk_nrf52840
+ tags: bluetooth