How to set nRF5340 3db tx power in NCS 1.6.0?

[frantas]

I'm trying to set tx power to +3db in the peripheral_uart sample.

I don't need dynamic control, just setting to always use +3db.

Adding the following line to prj.conf

CONFIG_BT_CTLR_TX_PWR_PLUS_3=y

doesn't work.

How can I do it?

[Carl Richard]

Hello! 

As pointed out by Joakim in this thread, static configuration using KConfig is not possible with the the Nordic Softdevice Controller (SDC), which is the default BT controller for our devices on NCS. As he points out you can use the approach in the HCI power control sample, with Vecord Specific HCI commands.

Alternatively you can switch to the Zephyr BT Controller with CONFIG_BT_LL_SW_SPLIT=y. However, this lacks some of the functionality provided by the SDC.

Best regards,
Carl Richard

[frantas]

Thanks Carl.

I'll try that approach.

Best regards,

Francisco

[Carl Richard]

No problem! Please report back your results. 

Best regards,
Carl Richard