I’m currently working on a setup with two Initiators and one Reflector using the Channel Sounding sample.
My goal is to get distance measurements either simultaneously or, if not possible, automatically alternating between the two initiators (without manual reset).
At the moment, I’ve:
-
Flashed the iniator sample on two different dev kits ( which are my two initiators)
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Adjusted the
prj.conffiles to include what seemed relevant for multiple connections (see below). -
Flashed one reflector device with its own configuration.
Everything builds and flashes correctly, and both initiators can measure distance — but only one at a time.
If one initiator is connected, the other cannot start measuring unless I reset the first one.
I would like some guidance on what modifications might be required (either in the main.c of the initiator or reflector, or in the configuration files) to allow both initiators to perform measurements without manual reset.
Here are my current configurations:
# # Copyright (c) 2024 Nordic Semiconductor ASA # # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause # #Initiators CONFIG_NCS_SAMPLES_DEFAULTS=y CONFIG_DK_LIBRARY=y CONFIG_BT=y CONFIG_BT_SMP=y CONFIG_BT_CENTRAL=y CONFIG_BT_MAX_CONN=2 CONFIG_BT_BONDABLE=n CONFIG_BT_GATT_CLIENT=y CONFIG_BT_GATT_DYNAMIC_DB=y CONFIG_BT_CHANNEL_SOUNDING=y CONFIG_BT_RAS=y CONFIG_BT_RAS_RREQ=y CONFIG_BT_SCAN=y CONFIG_BT_SCAN_FILTER_ENABLE=y CONFIG_BT_SCAN_UUID_CNT=1 # The Ranging Profile recommends a MTU of at least 247 octets. CONFIG_BT_L2CAP_TX_MTU=498 CONFIG_BT_BUF_ACL_TX_SIZE=502 CONFIG_BT_BUF_ACL_RX_SIZE=502 CONFIG_BT_ATT_PREPARE_COUNT=3 CONFIG_BT_CTLR_DATA_LENGTH_MAX=251 # This reduces RAM usage. Additional RAM is needed to support optional # features such as mode 3 or multiantenna. Change or remove these if # using those features CONFIG_BT_RAS_MODE_3_SUPPORTED=n CONFIG_BT_RAS_MAX_ANTENNA_PATHS=1 CONFIG_BT_CTLR_SDC_CS_MAX_ANTENNA_PATHS=1 CONFIG_BT_CTLR_SDC_CS_NUM_ANTENNAS=1 CONFIG_BT_CTLR_SDC_CS_STEP_MODE3=n CONFIG_BT_CTLR_SDC_CS_ROLE_INITIATOR_ONLY=y # Disabling the CS Test command reduces flash usage CONFIG_BT_CTLR_CHANNEL_SOUNDING_TEST=n # This allows CS and ACL to use different PHYs CONFIG_BT_TRANSMIT_POWER_CONTROL=y CONFIG_BT_CTLR_TX_PWR_PLUS_4=y # CONFIG_BT_CTLR_TX_PWR_PLUS_8=y # This improves the performance of floating-point operations CONFIG_FPU=y CONFIG_FPU_SHARING=y CONFIG_CBPRINTF_FP_SUPPORT=y CONFIG_BT_CS_DE=y CONFIG_BT_CS_DE_512_NFFT=y
# # Copyright (c) 2024 Nordic Semiconductor ASA # # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause # CONFIG_NCS_SAMPLES_DEFAULTS=y CONFIG_DK_LIBRARY=y CONFIG_BT=y CONFIG_BT_PERIPHERAL=y CONFIG_BT_SMP=y CONFIG_BT_DEVICE_NAME="Nordic CS Reflector" CONFIG_BT_MAX_CONN=2 CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n CONFIG_BT_BONDABLE=n CONFIG_BT_CTLR_SDC_CS_COUNT=2 CONFIG_BT_MAX_PAIRED=2 CONFIG_BT_CTLR_SDC_PERIPHERAL_COUNT=2 # The Ranging Profile recommends a MTU of at least 247 octets. CONFIG_BT_L2CAP_TX_MTU=498 CONFIG_BT_BUF_ACL_TX_SIZE=502 CONFIG_BT_BUF_ACL_RX_SIZE=502 CONFIG_BT_CTLR_DATA_LENGTH_MAX=251 CONFIG_BT_CTLR_PHY_2M=y # This reduces RAM usage. Additional RAM is needed to support optional # features such as mode 3 or multiantenna. Change or remove these if # using those features CONFIG_BT_RAS_MODE_3_SUPPORTED=n CONFIG_BT_RAS_MAX_ANTENNA_PATHS=1 CONFIG_BT_CTLR_SDC_CS_MAX_ANTENNA_PATHS=1 CONFIG_BT_CTLR_SDC_CS_NUM_ANTENNAS=1 CONFIG_BT_CTLR_SDC_CS_STEP_MODE3=n CONFIG_BT_CTLR_SDC_CS_ROLE_REFLECTOR_ONLY=y # Disabling the CS Test command reduces flash usage CONFIG_BT_CTLR_CHANNEL_SOUNDING_TEST=n # This allows CS and ACL to use different PHYs CONFIG_BT_TRANSMIT_POWER_CONTROL=y # CONFIG_BT_CTLR_TX_PWR_PLUS_4=y CONFIG_BT_CTLR_TX_PWR_PLUS_8=y CONFIG_BT_CHANNEL_SOUNDING=y CONFIG_BT_RAS=y CONFIG_BT_RAS_RRSP=y
Thank you for your help and time
