Dynamically setting transmit power of ISO channels

RE: Dynamically setting transmit power of ISO channels

Amanda Hsieh — Tue, 08 Oct 2024 13:24:17 GMT

Hi,

The new PR to support BIS is merged into the main version and will be released in v2.8.0.

It contains an addition to sdc_hci_cmd_vs_zephyr_write_tx_power which allows setting broadcaster TX power using the BIG handle, so this allows to change the TX power after the BIS was created.

When a BIS broadcaster is set up, it initially uses the same TX power as the associated periodic advertiser.

-Amanda H.

RE: Dynamically setting transmit power of ISO channels

aspearDS — Mon, 30 Sep 2024 11:04:21 GMT

Amanda,

[quote userid="77782" url="~/f/nordic-q-a/114780/dynamically-setting-transmit-power-of-iso-channels/503761"]If you update the TX power of the ACL (on the main branch), the CIS will also be updated.[/quote]

Just to clarify, I am using BIS (broadcast) ISO, not CIS (connected).

[quote userid="77782" url="~/f/nordic-q-a/114780/dynamically-setting-transmit-power-of-iso-channels/503761"]Here is the PR:https://github.com/nrfconnect/sdk-nrf/pull/17413 to fix the issue, also in the main version now.[/quote]

Looking at the PR, it is not clear what is the fix. Can you provide a code example of how I would set the transmit power of the BIS stream?

I also see another ticket that was entered a day after this one that is very similar: https://devzone.nordicsemi.com/f/nordic-q-a/114812/how-to-set-tx-power-for-bis-iso-streams-alone. That ticket is using 2.7 instead of 2.6, but I expect the resolutions of the tickets to be similar.

Thanks,

Andrew

RE: Dynamically setting transmit power of ISO channels

Amanda Hsieh — Wed, 25 Sep 2024 12:57:54 GMT

Hi,

Here is the PR:https://github.com/nrfconnect/sdk-nrf/pull/17413 to fix the issue, also in the main version now.

If you update the TX power of the ACL (on the main branch), the CIS will also be updated.

-Amanda H.

RE: Dynamically setting transmit power of ISO channels

Amanda Hsieh — Wed, 18 Sep 2024 15:19:53 GMT

Hi,

I am working on your case and will update it when I collect enough information.

Regards,
Amanda H.