https://devzone.nordicsemi.com/f/nordic-q-a/120883/failing-to-create-cs-configHi , i am trying to use ble channel sounding feature through hci uart with an external host. I am sending CS commands but getting the following error for one of the commands. I am trying to create Cs config ( ogf= 0x08 , ocf =0x0090) but getting invaliden-USTelligent Community 13Wed, 23 Apr 2025 09:18:51 GMThttps://devzone.nordicsemi.com/thread/532545?ContentTypeID=1Wed, 23 Apr 2025 09:18:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8e2ba7c4-aa3a-4118-8989-479bff0c9742Abhinav152<p>Hi <a href="https://devzone.nordicsemi.com/members/kme">Kenneth (kme),</a>I used the same proj.conf options of ras_initiator in hci_uart application, but it didn&#39;t help . .Floowing is proj,conf file&nbsp;<br /><br /></p> <div> <div><span>CONFIG_CONSOLE</span><span>=n</span></div> <div><span>CONFIG_STDOUT_CONSOLE</span><span>=n</span></div> <div><span>CONFIG_UART_CONSOLE</span><span>=n</span></div> <div><span>CONFIG_GPIO</span><span>=y</span></div> <div><span>CONFIG_SERIAL</span><span>=y</span></div> <div><span>CONFIG_UART_INTERRUPT_DRIVEN</span><span>=y</span></div> <div><span>CONFIG_BT</span><span>=y</span></div> <div><span>CONFIG_BT_HCI_RAW</span><span>=y</span></div> <div><span>CONFIG_BT_HCI_RAW_H4</span><span>=y</span></div> <div><span>CONFIG_BT_HCI_RAW_H4_ENABLE</span><span>=y</span></div> <div><span>CONFIG_BT_BUF_ACL_RX_SIZE</span><span>=255</span></div> <div><span>CONFIG_BT_BUF_CMD_TX_SIZE</span><span>=255</span></div> <div><span>CONFIG_BT_BUF_EVT_DISCARDABLE_SIZE</span><span>=255</span></div> <div><span>CONFIG_BT_CTLR_ASSERT_HANDLER</span><span>=y</span></div> <div><span>CONFIG_BT_MAX_CONN</span><span>=16</span></div> <div><span>CONFIG_BT_CTLR_DTM_HCI</span><span>=y</span></div> <div><span>CONFIG_BT_CTLR_ADV_EXT</span><span>=y</span></div> <div><span>CONFIG_BT_CTLR_CHANNEL_SOUNDING</span><span>=y</span></div> <div><span>CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE</span><span>=512</span></div> <div><span>CONFIG_BT_CTLR_SDC_CS_MAX_ANTENNA_PATHS</span><span>=1</span></div> <div><span>CONFIG_BT_CTLR_SDC_CS_NUM_ANTENNAS</span><span>=1</span></div> <div><span>CONFIG_BT_CTLR_SDC_CS_STEP_MODE3</span><span>=n</span></div> <br /> <div><span># Workaround: Unable to allocate command buffer when using K_NO_WAIT since</span></div> <div><span># Host number of completed commands does not follow normal flow control.</span></div> <div><span>CONFIG_BT_BUF_CMD_TX_COUNT</span><span>=10</span></div> </div><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/532355?ContentTypeID=1Tue, 22 Apr 2025 12:52:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a76cd52c-1d0c-46d3-a3bb-f2c5e1beeb80Kenneth<p>Hello,</p> <p>I suggest to look at an existing example that support channel sounding and use the kconfig options from there as reference:<br />\nrf\samples\bluetooth\channel_sounding_ras_initiator\prj.conf</p> <p>Kenneth</p><div style="clear:both;"></div>