https://devzone.nordicsemi.com/f/nordic-q-a/117210/setting-connection-tx-powerHello everyone, I am using the nrf5340 for a Bluetooth project with the nrf sdk 2.4.0. Since a stable connection is essential, I want to increase the connection tx power to 3 dbm. When staying at the standard 0 dbm I get connection losses. I coulden-USTelligent Community 13Wed, 11 Dec 2024 14:29:12 GMThttps://devzone.nordicsemi.com/thread/514549?ContentTypeID=1Wed, 11 Dec 2024 14:29:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8d959f58-92dd-44de-bf5e-e5c69a950782Amanda Hsieh<p>Hi,&nbsp;</p> <p><span>How to set the output power is described&nbsp;</span><a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/protocols/matter/getting_started/transmission_power.html#changing_tx_power_for_bluetooth_le">here</a><span>. The critical aspect when using the nRF5340 is that you also need to set this for the network core, which is done by modifying the hci_rpmsg.conf file in the child_image subfolder of your project. Try to delete the build folder and build again.&nbsp;Check the .config under build/hci_rpmsg/zephyr to see whether the config takes effect.&nbsp;</span></p> <p>You can refer to&nbsp;<a href="https://docs.nordicsemi.com/bundle/ncs-2.4.0/page/zephyr/samples/bluetooth/hci_pwr_ctrl/README.html">Bluetooth: HCI Power Control</a>&nbsp;to d<span>ynamically control the Tx power of a Bluetooth LE Controller using HCI vendor-specific commands.</span></p> <p><span>Regards,<br />Amanda H.</span></p><div style="clear:both;"></div>