How to use nrf54L15-dk with external host through hci uart application

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Tue, 29 Apr 2025 05:29:02 GMT

Thanks for the support till now. Appreciate your patience. I will raise the new ticket. Thanks ivan iushkov for your debug helping

RE: How to use nrf54L15-dk with external host through hci uart application

Simonr — Tue, 29 Apr 2025 05:23:16 GMT

We're moving out of the scope of this ticket now I think, and you should consider creating a new ticket if you need further help with this, but Channel sounding security is handled in the cs.h file with the bt_le_cs_security_enable() function or in sdc_hci_cmd_le.h file with the sdc_hci_cmd_le_cs_security_enable() function depending on what Bluetooth controller you're using (Zephyr or SoftDevice controller).

Best regards,

SImon

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Mon, 28 Apr 2025 12:19:10 GMT

Thanks for rectifying the issues. I want to test the LE securotuy mode for the CS feature

Can you tell me how the NRF controller supports this Cs procedure and whether the controller sends any event to the host so that security levels can be checked? Also i want to set this security level. I tried searching in the NRF code, but can you help to locate how sample examples has set the security level

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Wed, 23 Apr 2025 12:25:08 GMT

I am not sure exactly but I see at least two values not allowed by Spec:

- channel_map_repetition is allowed to be in the range from 1 to 0xff

- channels 1 and 23 are not allowed to be used during Channel sounding procedure.

Can you try to disable channel 1 and 23 by setting

cmd->channel_map[0] = 0x08
cmd->channel_map[2] = 0x4f

and see if it helps please?

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 23 Apr 2025 11:36:51 GMT

Also, i tried with the values provided by NRF example using the below way but it didn't work. In this case all channel map values are 0

BT_LE_CS_CHANNEL_BIT_SET_VAL(cmd.channel_map, 0, 0);

BT_LE_CS_CHANNEL_BIT_SET_VAL(cmd.channel_map, 1, 0);

BT_LE_CS_CHANNEL_BIT_SET_VAL(cmd.channel_map, 23, 0);

BT_LE_CS_CHANNEL_BIT_SET_VAL(cmd.channel_map, 24, 0);

BT_LE_CS_CHANNEL_BIT_SET_VAL(cmd.channel_map, 25, 0);

BT_LE_CS_CHANNEL_BIT_SET_VAL(cmd.channel_map, 77, 0);

BT_LE_CS_CHANNEL_BIT_SET_VAL(cmd.channel_map, 78, 0);

BT_LE_CS_CHANNEL_BIT_SET_VAL(cmd.channel_map, 79, 0);

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 23 Apr 2025 11:33:21 GMT

Hi , Foloowing are my channel map values

cmd->conn_handle = 1e
cmd->config_id = 0
cmd->create_context = 1
cmd->main_mode_type = 1
cmd->sub_mode_type = ff
cmd->min_main_mode_steps = 2
cmd->max_main_mode_steps = 5
cmd->main_mode_repetition = 0
cmd->mode_0_steps = 3
cmd->role = 0
cmd->rtt_type = 0
cmd->cs_sync_phy = 1
cmd->channel_map_repetition = 0
cmd->channel_selection_type = 0
cmd->ch3c_shape = 0
cmd->ch3c_jump = 2
cmd->channel_map[0] = a
cmd->channel_map[1] = fa
cmd->channel_map[2] = cf
cmd->channel_map[3] = ac
cmd->channel_map[4] = fa
cmd->channel_map[5] = c0
cmd->channel_map[6] = 0
cmd->channel_map[7] = 0
cmd->channel_map[8] = 0
cmd->channel_map[9] = 0

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Wed, 23 Apr 2025 11:20:33 GMT

can you also provide `Channel_Map` value please?

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 23 Apr 2025 11:01:16 GMT

Yes, following is the error code

ogf=0x08, ocf=0x0090, hci_err=0x212 : BLE_ERR_INV_HCI_CMD_PARMS (Invalid HCI Command Parameters)

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Wed, 23 Apr 2025 10:59:35 GMT

can you please provide the error code returned by Controller for this configuration?

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 23 Apr 2025 10:53:07 GMT

Okay i had used the correct value before, 0xff came in experimentation . here is the correct set values as per Bluetooth Core Specification 6.0, Vol 4, Part E, 7.8.137
`LE CS Create Config command`

cmd->conn_handle = 1e
cmd->config_id = 0
cmd->create_context = 1
cmd->main_mode_type = 1
cmd->sub_mode_type = ff
cmd->min_main_mode_steps = 2
cmd->max_main_mode_steps = 5
cmd->main_mode_repetition = 0
cmd->mode_0_steps = 3
cmd->role = 0
cmd->rtt_type = 0
cmd->cs_sync_phy = 1
cmd->channel_map_repetition = 0
cmd->channel_selection_type = 0
cmd->ch3c_shape = 0
cmd->ch3c_jump = 2

Could you please find anything wrong in those params?

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 23 Apr 2025 10:47:38 GMT

okay thanks for clarification

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Wed, 23 Apr 2025 10:46:02 GMT

i didn't check all the values, but at least `cmd->mode_0_steps = 0xff` is not allowed.

You can find details in the Bluetooth Core Specification 6.0, Vol 4, Part E, 7.8.137
`LE CS Create Config command`

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Wed, 23 Apr 2025 10:40:53 GMT

Bluetooth controller (SDC) is closed-source static library so there is no way to debug it.

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 23 Apr 2025 10:30:38 GMT

Hi,

I tried all combinations of main mode and submode, including unset ( that is 0xFF to sub mode), but it didn't help.. Parameters for the command are as follows. Also, i modified the proj.conf but it didn't work.
cmd->conn_handle = 1e
cmd->config_id = 0
cmd->create_context = 1
cmd->main_mode_type = 1
cmd->sub_mode_type = ff
cmd->min_main_mode_steps = 2
cmd->max_main_mode_steps = 5
cmd->main_mode_repetition = 0
cmd->mode_0_steps = ff
cmd->role = 0
cmd->rtt_type = 0
cmd->cs_sync_phy = 1
cmd->channel_map_repetition = 0
cmd->channel_selection_type = 0
cmd->ch3c_shape = 0
cmd->ch3c_jump = 2

Below is the latest proj.conf

CONFIG_CONSOLE=n

CONFIG_STDOUT_CONSOLE=n

CONFIG_UART_CONSOLE=n

CONFIG_GPIO=y

CONFIG_SERIAL=y

CONFIG_UART_INTERRUPT_DRIVEN=y

CONFIG_BT=y

CONFIG_BT_HCI_RAW=y

CONFIG_BT_HCI_RAW_H4=y

CONFIG_BT_HCI_RAW_H4_ENABLE=y

CONFIG_BT_BUF_ACL_RX_SIZE=255

CONFIG_BT_BUF_CMD_TX_SIZE=255

CONFIG_BT_BUF_EVT_DISCARDABLE_SIZE=255

CONFIG_BT_CTLR_ASSERT_HANDLER=y

CONFIG_BT_MAX_CONN=16

CONFIG_BT_CTLR_DTM_HCI=y

CONFIG_BT_CTLR_ADV_EXT=y

CONFIG_BT_CTLR_CHANNEL_SOUNDING=y

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=512

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_CHANNEL_SOUNDING_REASSEMBLY_BUFFER_SIZE=1920

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

# Workaround: Unable to allocate command buffer when using K_NO_WAIT since

# Host number of completed commands does not follow normal flow control.

CONFIG_BT_BUF_CMD_TX_COUNT=10

CONFIG_BT_TRANSMIT_POWER_CONTROL=y

CONFIG_BT_CS_DE=y

CONFIG_BT_CS_DE_512_NFFT=y

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 23 Apr 2025 09:16:55 GMT

I tried setting sub_mode to 0, but it didn't help. Is there a way to trace a controller code and check what exactly is falling, or is it a black box to debug?

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Tue, 22 Apr 2025 10:09:08 GMT

I guess this configuration might be invalid due to

cmd->main_mode_type = 1
cmd->sub_mode_type = 1

Because the Bluetooth Core Spec 6.0 doesn't allow this combination of modes. It is described in the Core Specification 6.0, Vol. 6, Part H, 4.4.2 CS subevent structure, table 4.11.

Can you try to set sub_mode_type to "Unused" and check if it helps?

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Mon, 21 Apr 2025 09:42:00 GMT

Update i skipped the part to read remote FAE table .. and directly called the Create Cs config command. Still facing same issue while creating config ? The following are the command parameters.
cmd->conn_handle = 2fd
cmd->config_id = 0
cmd->create_context = 0
cmd->main_mode_type = 1
cmd->sub_mode_type = 1
cmd->min_main_mode_steps = 2
cmd->max_main_mode_steps = 5
cmd->main_mode_repetition = 0
cmd->mode_0_steps = 3
cmd->role = 0
cmd->rtt_type = 0
cmd->cs_sync_phy = 1
cmd->channel_map_repetition = 3
cmd->channel_selection_type = 0
cmd->ch3c_shape = 0
cmd->ch3c_jump = 2

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Mon, 21 Apr 2025 05:18:28 GMT

Hi Ivan Iushkov,
I am trying to create Cs config ( ogf= 0x08 , ocf =0x0090) but getting invalid parameters from the controller (212). Can you help me solve this? I have already gone through the BLE spec. The probable reason is related to the role. Also, the command set default CS settings is successful, but getting the error in read remote fae table complete event as status code 0x11.

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 16 Apr 2025 08:38:42 GMT

Update: I just updated the param max_tx_power to 0x0 and it worked

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Wed, 16 Apr 2025 08:35:17 GMT

Hi ivan iushkov

Thanks. I was able to send a few CS commands successfully. but getting an invalid cmd params error for the following command
HCI_OPCODE_CMD_LE_CS_SET_DEFAULT_SETTINGS,
I am sending these params. I am not sure if i can debug the code for nrf controller. I found the declaration for sdc_hci_cmd_le_cs_set_default_settings() but not the definition.

conn_handle = le16toh(ev->conn_handle);

role_enable = 0x01;

cs_sync_antenna_selection = 0x01;

max_tx_power = 0x7F;

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Fri, 11 Apr 2025 11:12:23 GMT

This warning is not critical for CS use-case. You don't need DTM in order to use normal Bluetooth Low Energy with Channel sounding, so you can just ignore it

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Fri, 11 Apr 2025 11:10:28 GMT

Hey, i reinstalled the entire setup just like the Nordic install guide and it started compiling. Cs feature is also enabled. But i am getting one warning : BT_CTLR_DTM_HCI (defined at subsys/bluetooth/controller/Kconfig.dtm:14) was assigned the
value 'y' but got the value 'n'. Check these unsatisfied dependencies: BT_CTLR_DTM_HCI_SUPPORT (=n).

Do I need this flag to be enabled for working with an external host?

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Fri, 11 Apr 2025 07:43:51 GMT

Unfortunately toolchain and workspace installation are not my area of expertise 😞 . The last thing I can suggest here is to use VSCode extension because it helps to install SDK and toolchain in a safe and reliable way, also it is very convenient to use!

RE: How to use nrf54L15-dk with external host through hci uart application

Abhinav152 — Fri, 11 Apr 2025 06:43:47 GMT

Hi, I tried reinstalling the nRF SDK, but I'm still encountering the same errors.

According to the nRF SDK installation guide, there should be an ncs folder that serves as the main workspace. However, in my case, I've cloned the nRF SDK and the Zephyr toolchain separately, so they're not located in the same directory.

The reason I chose this setup is because nrfutil is no longer working for me.

I also tried removing the build directory and tried but the same issue was encountered

RE: How to use nrf54L15-dk with external host through hci uart application

ivan iushkov — Thu, 10 Apr 2025 18:52:31 GMT

hmm, that's strange.I don't have the first line like in your output "manifest nrf HEAD N/A".

Just a couple more questions from my side:

1. Have you initialized the workspice according to this guide? https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/installation/install_ncs.html#get-the-ncs-code . I think the following command should be used to initialize it properly `west init -m github.com/.../sdk-nrf --mr v3.0.0-rc1 v3.0.0-rc1` (it may take quite long time because it downloads all the repositories).

2. Can you try to remove build/ directory and do `west build -bnrf54l15dk/nrf54l15/cpuapp` again? Maybe there are some invalid objects from the previous attempts to build, but usually it shoudn't be an issue.