How to chang the Zigbee sample tx power?

[Searcher]

Dear Sir/Madam,

I am using Zigbee: Light bulb — nRF Connect SDK 2.6.99 documentation (nordicsemi.com) this sample to do an evaluation, and I would like to change the tx power.

I tried to use nrf_802154_tx_power_set(int8_t power) and even use NRF_RADIO->TXPOWER directly to change the tx power, but seems all failed. Could you guide me how I can change the tx power under nRF Connect SDK 2.6.99? Thanks a lot.

[Kazi Afroza Sultana]

Hello,

I am really sorry that it was a private case link. The case is about TX power control of zigbee.

ZBOSS stack configures the radio TX power and by default it attempts to set maximum possible gain. You can use Production Config to change the default TX power set by ZBOSS.

You can see some more info about it here: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_tz_v4.1.0%2Fzigbee_prog_principles.html&anchor=zigbee_production_config

To use production config, you need to:

• generate hex file that contain the ZBOSS Production Config using nrfutil:
  - some documentation: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrfutil%2FUG%2Fnrfutil%2Fnrfutil_prod_config_generate_hexfiles.html
  - in the input yaml file put only the fields you actually want to change (like tx power, channel mask), remove the unused ones (example yaml file is printed as help message nrfutil zigbee production_config --help)
  - set correct offset using --offset, use start address of zboss_product_config partition (list of partitions and addresses are in partitions.yml in the sample build folder).
• flash the hex file along with the firmware