How to properly set TX Power when advertising as peripheral

[toni95]

Hello,

I am trying to set the TX Power on theThingy:53 to -20 for advertising. However when I check the output files, the Option `CONFIG_BT_CTLR_TX_PWR_MINUS_20` is always no. 

Currently I am trying with the nRF sample Peripheral LBS but without success. I put `CONFIG_BT_CTLR_TX_PWR_MINUS_20=y` into prj.confand into the board specific config files.

Can anyone help or had the same issue or am I doing it wrong? By now I did not change a thing to the code except above.

Best,

Toni

[Syed Maysum Abbas Zaidi]

Hi,

On Thingy:53 (nRF5340-based), the Bluetooth controller runs on the network core, so controller Kconfig options like CONFIG_BT_CTLR_TX_PWR_MINUS_20 must be applied to the network-core image, not in the application core’s prj.conf. In practice you can do it in the following way:

In the application folder, create child_image/hci_ipc.conf and put CONFIG_BT_CTLR_TX_PWR_MINUS_20=y inside that file and then do a pristine build. Also remember to remove it from the app’s prj.conf (optional but recommended to avoid confusion).

Best Regards,
Syed Maysum

[toni95]

Hi,

thanks for your reply. You pointed me to the right direction. The way you proposed did not work but by creating the file in the directory sysbuild/ipc_radio/ it worked. Thanks!

Best, 

Toni