nRF54L15 HCI_LE_CS_TEST Unsupported Feature or Parameter Value (0x11)

[Lee1823]

Hello,

I configured the hci_uart sample for the nRF54L15 DK by following the instructions in this official Nordic documentation:

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrfxlib/softdevice_controller/doc/channel_sounding.html

After flashing the configured firmware, I sent the HCI_LE_CS_TEST command to the Nordic controller using an external Bluetooth host. The specific parameters of this command are shown in the attached image. However, the controller responded with the error Unsupported Feature or Parameter Value (0x11).

Could you please help identify which part of my configuration is incorrect?

Thank you for your assistance!

[Lee1823]

Dear Terje,
Below are the complete commands I sent. Please help me check what the problem is. Thank you very much.

1、HCI_LE_Read_Local_Supported_Features_Page_0

# btmon pactet capture


2、HCI_LE_Set_Host_Feature [v1](Set Host Support:bit47->0x2F)




3、HCI_Set_Event_Mask(Set LE Meta)




4、HCI_LE_Set_Event_Mask(Set CS Event Mask:bit43 to bit50->0xF8 0x07)




5、HCI_LE_CS_Read_Local_Supported_Capabilities




6、HCI_LE_CS_Test

[Lee1823]

Hello,

I have found that the Timing Parameter you mentioned earlier is dependent on the nRF Connect SDK version.

The version I am using is v3.1.1, so the value of T_IP1 should be 60 µs or greater.

This is one of the reasons why the HCI command kept failing when I set it to 30 µs as you previously suggested.

Furthermore, from the document you provided, I assumed all the listed Timing Parameters were mandatory.

This led me to change the Bluetooth official default value of 0x00 for the T_SW parameter to your recommended 10 µs.

However, the nRF54L15 DK has only one antenna, and I did not configure multi-antenna mode for testing.

This also resulted in errors when sending the command.

After reverting T_SW back to the official default value 0x00, the HCI command was sent successfully.