Print RSSI value in LE Audio walkie-talkie example for nrf5340 Audio dk

[SNJY]

Hi, I am looking into printing the RSSI values for both the boards in a walkie-talkie configuration example for the LE Audio dk. I tried reading other discussion about printing rssi values, Some of the discussions do not have conclusion or a direct example given that i can refer to. One of the discussions mentions using the softdevice API for retrieving the rssi values. Is there an example on how to implement this correctly? I tried doing it, but I run into an error 'undefined reference to `sdc_hci_cmd_sp_read_rssi'  The declaration for this function exists in sdc_hci_cmd_status_params.h but i am not able to track the actual function from vscode. i cannot see its implementation on github as well.

Can you please guide me on how to make this work? My goal is to print RSSI values on gateway and headset on LE Audio.

Thanks

[Hieu]

Hi,

sdc_hci_cmd* functions are only useable when your application includes the SoftDevice Controller, such as in single core setup with the nRF52 series or nRF54L15.

On a typical nRF5340 setup, the BLE controller resides in the network core, while your application resides in the application core. Therefore, you need to send an HCI command to retrieve RSSI. This is demonstrated in the HCI Power Control sample.

Hieu