Change TX power for the nRF52840-DK

[Dayrene]

Hi,

I am testing the Peripheral Heart Rate Monitor with the Coded PHY application for the nRF52840-DK kit. So, I am using two kits, one running the Peripheral Heart Rate Monitor with Coded PHY application and the other the Central Heart Rate Monitor with Coded PHY. The basic setup is working well. Now I want to change the transmit power for advertising. At the receiver side, I am printing on the terminal the transmit power and it is -16 dBm. I want to change it to different values, up to +8dBm, to test the communication range. Although it seems a basic configuration, I have been trying to find some guidance to start with, but I cannot find anything. Could you please indicate the easiest way of changing TX power at the Peripheral Heart Rate Monitor with the Coded PHY application?

Thank you very much in advance.

Best regards,

Dayrene

[Kenneth]

Hi,

To enable dynamic TX power control, add the following to your configuration: 
CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y

You can check out: \zephyr\samples\bluetooth\hci_pwr_ctrl and set_tx_power() in main.c

Kenneth