Bluetooth: Unicast Audio Client

Overview

Application demonstrating the LE Audio unicast client functionality. Scans for and connects to a LE Audio unicast server and establishes an audio stream.

This sample can be found under samples/bluetooth/unicast_audio_client in the Zephyr tree.

Check the bluetooth samples section for general information.

Requirements

• BlueZ running on the host, or

• A board with Bluetooth Low Energy 5.2 support

Building and Running

When building targeting an nrf52 series board with the Zephyr Bluetooth Controller, use -DOVERLAY_CONFIG=overlay-bt_ll_sw_split.conf to enable the required ISO feature support.

Building for an nrf52840dk

# From the root of the zephyr repository
west build -b nrf52840dk/nrf52840 samples/bluetooth/unicast_audio_client/ -- -DOVERLAY_CONFIG=overlay-bt_ll_sw_split.conf

Building for an nrf5340dk

You can build both the application core image and an appropriate controller image for the network core with:

# From the root of the zephyr repository
west build -b nrf5340dk/nrf5340/cpuapp --sysbuild samples/bluetooth/unicast_audio_client/

If you prefer to only build the application core image, you can do so by doing instead:

# From the root of the zephyr repository
west build -b nrf5340dk/nrf5340/cpuapp samples/bluetooth/unicast_audio_server/

In that case you can pair this application core image with the hci_ipc sample samples/bluetooth/hci_ipc/nrf5340_cpunet_iso-bt_ll_sw_split.conf configuration.

Building for a simulated nrf52_bsim

Similarly to how you would for real HW, you can do:

# From the root of the zephyr repository
west build -b nrf52_bsim samples/bluetooth/unicast_audio_client/ -- -DOVERLAY_CONFIG=overlay-bt_ll_sw_split.conf

Note this will produce a Linux executable in ./build/zephyr/zephyr.exe. For more information, check this board documentation.

Building for a simulated nrf5340bsim

# From the root of the zephyr repository
west build -b nrf5340bsim/nrf5340/cpuapp --sysbuild samples/bluetooth/unicast_audio_client/