Hi everyone,
These days I'm evaluating the Nordic nRF5340 to manage audio from two microphones to one dongle station. To achieve this, I configured two nRF5340s as unicast servers and one nRF5340 as a unicast client.
The entire system seems to work correctly, but I receive audio from only one server. I'm sure that both servers stream at the same time, but for some reason, my client reproduces only the audio from one of them.
At the moment, in the build setup, I'm using only the
overlay-unicast_server.conf / overlay-unicast_client.conf files, and the related labels seem to be set correctly.Can someone help me understand the issue?
Here my setup of unicast server
the Flag configuration of Unicast Server:
#
# Copyright (c) 2025 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#
CONFIG_AUDIO_DEV=1
CONFIG_BT_GATT_AUTO_DISCOVER_CCC=y
CONFIG_BT_GATT_AUTO_RESUBSCRIBE=n
CONFIG_BT_GATT_AUTO_SEC_REQ=n
CONFIG_BT_GATT_AUTO_UPDATE_MTU=y
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_GATT_DYNAMIC_DB=y
CONFIG_BT_MAX_CONN=4
CONFIG_BT_MAX_PAIRED=4
CONFIG_BT_EXT_ADV=y
CONFIG_BT_AUDIO=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_ISO_PERIPHERAL=y
CONFIG_BT_BAP_UNICAST_SERVER=y
CONFIG_BT_CAP_ACCEPTOR=y
CONFIG_BT_CAP_ACCEPTOR_SET_MEMBER=y
CONFIG_BT_PAC_SNK=y
CONFIG_BT_PAC_SNK_NOTIFIABLE=y
CONFIG_BT_PAC_SRC=y
CONFIG_BT_PAC_SRC_NOTIFIABLE=y
CONFIG_BT_CSIP_SET_MEMBER=y
CONFIG_BT_DEVICE_APPEARANCE=2369
CONFIG_BT_ISO_MAX_CHAN=3
CONFIG_BT_ASCS=y
CONFIG_BT_ASCS_MAX_ASE_SNK_COUNT=2
CONFIG_BT_ASCS_MAX_ASE_SRC_COUNT=1
CONFIG_BT_VCP_VOL_REND=y
CONFIG_BT_CONTENT_CTRL_MEDIA=y
CONFIG_BT_GAP_PERIPHERAL_PREF_PARAMS=n
CONFIG_BT_AUDIO_CODEC_CFG_MAX_METADATA_SIZE=25
CONFIG_LC3_ENC_CHAN_MAX=1
CONFIG_LC3_DEC_CHAN_MAX=2
CONFIG_MBEDTLS_ENABLE_HEAP=y
CONFIG_MBEDTLS_HEAP_SIZE=2048
# Stereo configs
CONFIG_BT_AUDIO_CONCURRENT_RX_STREAMS_MAX=2
CONFIG_AUDIO_DECODE_CHANNELS_MAX=2
CONFIG_AUDIO_SOURCE_I2S=y
# Always enable bidirectional stream support on the server.
# The client may not support it, but the server should be able to handle it if the client does.
CONFIG_STREAM_BIDIRECTIONAL=y
the Flag configuration of Unicast Client:
#
# Copyright (c) 2025 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#
CONFIG_BT_CENTRAL=y
CONFIG_AUDIO_DEV=2
CONFIG_BT_GATT_DYNAMIC_DB=y
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_GATT_AUTO_DISCOVER_CCC=y
CONFIG_BT_GATT_AUTO_UPDATE_MTU=y
CONFIG_BT_MAX_CONN=2
CONFIG_BT_MAX_PAIRED=2
CONFIG_BT_EXT_ADV=y
CONFIG_BT_AUDIO=y
CONFIG_BT_ISO_CENTRAL=y
CONFIG_BT_BAP_UNICAST_CLIENT=y
CONFIG_BT_CAP_INITIATOR=y
CONFIG_BT_CSIP_SET_COORDINATOR=y
CONFIG_BT_DEVICE_APPEARANCE=2176
# Support an ISO channel per ASE
CONFIG_BT_ISO_MAX_CHAN=4
CONFIG_BT_VCP_VOL_CTLR=y
CONFIG_BT_BAP_UNICAST_CLIENT_GROUP_STREAM_COUNT=4
CONFIG_BT_BAP_UNICAST_CLIENT_ASE_SNK_COUNT=4
CONFIG_BT_BAP_UNICAST_CLIENT_ASE_SRC_COUNT=2
CONFIG_UTF8=y
CONFIG_BT_CONTENT_CTRL_MEDIA=y
CONFIG_BT_AUDIO_CODEC_CFG_MAX_METADATA_SIZE=40
CONFIG_BT_AUDIO_CODEC_CAP_MAX_METADATA_SIZE=40
CONFIG_LC3_ENC_CHAN_MAX=2
CONFIG_LC3_DEC_CHAN_MAX=2
CONFIG_AUDIO_ENCODE_CHANNELS_MAX=2
CONFIG_MBEDTLS_ENABLE_HEAP=y
CONFIG_MBEDTLS_HEAP_SIZE=2048
CONFIG_BT_AUDIO_CONCURRENT_RX_STREAMS_MAX=2
CONFIG_AUDIO_DECODE_CHANNELS_MAX=2
thanks in advance!!