RE: Extend ble acl on LE Audio headset

Karl Ylvisaker — Mon, 14 Nov 2022 09:37:21 GMT

No problem at all, Gerry - I am happy to help! :)

Best regards,
Karl

RE: Extend ble acl on LE Audio headset

Gerry — Fri, 11 Nov 2022 13:00:04 GMT

Thanks Karl

RE: Extend ble acl on LE Audio headset

Karl Ylvisaker — Tue, 01 Nov 2022 13:04:12 GMT

Hello Gerry,

Thank you for your patience with this.

[quote user=""]We work on a custom hardware (LE Audio headset) and we need to send the battery voltage of the headset to the gateway which will be a smartphone. Using nRF Connect, I can see the BLE ACL (Volume control etc.). Can someone help me to implement a custom property like battery voltage?[/quote]

You should be fine to add 'regular' BLE communication alongside the LE Audio communication. We have internally tested 2 ACLs with 1 CIS each, for volume control etc, and you should be able to use these just as well to transfer your battery level or similar.

Some considerations however:
1. Make sure that the Connection interval is at least 4 times larger than the ISO interval, and has a common denominator with the ISO interval.
2. Make sure that you finish all link layer negotiations (connection parameter updates, etc) before establishing the ISO channel - we have seen a few instances were multiple LL negotiations during regular CIS operation could cause a link instability, if you are unlucky. We are working on resolving this, but the current recommendation is to avoid these operations after the ISO channel is established.

Best regards,
Karl