updating advertising parameters during runtime within callback function using Zephyr

RE: updating advertising parameters during runtime within callback function using Zephyr

Vidar Berg — Thu, 18 Jan 2024 11:52:36 GMT

Hello Maulik,

The advertisement parameters cannot be updated on the fly like you can for the advertisement payload. The advertisement set has to be started again after you've updated the parameters. bt_le_ext_adv_update_param can be used to update the adv. params for an already created adv. set, but not when the adv. set is active.

Best regards,

Vidar

RE: updating advertising parameters during runtime within callback function using Zephyr

Maulik — Thu, 18 Jan 2024 10:44:13 GMT

Hello Vidar,

Yes, I tried that, I first stopped the advertising and then updated advertising parameter. But issue is that after using bt_le_ext_adv_update_param advertising is stopped. So do I have to again start the advertising? If yes then how does this update function make sense to update parameters on the fly, I would rather stop advertising and start again with updated parameter. Can you please confirm it?

Best regards,
Maulik

RE: updating advertising parameters during runtime within callback function using Zephyr

Vidar Berg — Wed, 17 Jan 2024 16:05:42 GMT

Hello Maulik,

Thanks for the additional information. I assumed you wanted to update the advertising data on the fly, but I now see that you are trying to update the advertising parameters instead. This requires you to stop the advertiser first:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.5.1/zephyr/connectivity/bluetooth/api/gap.html#c.bt_le_ext_adv_update_param

Best regards,

Vidar

RE: updating advertising parameters during runtime within callback function using Zephyr

Maulik — Wed, 17 Jan 2024 15:30:01 GMT

Hello Vidar,

Thank you for your reply,
- I want to update an advertising interval after the scan response has been sent. Please note that I am directly using bt_le_ext_adv_update_param without stopping advertising.

- Error: Failed to update advertising parameter (err -22)

Best Regards,
Maulik

RE: updating advertising parameters during runtime within callback function using Zephyr

Vidar Berg — Wed, 17 Jan 2024 13:00:39 GMT

Hello,

[quote user=""]Can I use bt_le_ext_adv_cb to register callbacks for Legacy advertising? Alternatively is there any callbacks structure available to registers callback in Legacy advertising?[/quote]

Yes, you can perform legacy advertising with the bt_le_ext_adv_* APIs. This is achieved by not setting the BT_LE_ADV_OPT_EXT_ADV flag in your advertisment params.

[quote user=""]I want to update advertising parameters when I get a scan request and send scan response data (using scanned callback within bt_le_ext_adv_cb structure).This updating of the advertising parameters should be done within the callback itself. Should it be possible to do so during runtime using bt_le_ext_adv_update_param API, because I am getting an error. [/quote]

Perhaps you could you explain the motivation for updating the data inside the callback, and also let me know what the error code was? Please note that the callback is invoked after the scan response has been sent.

Best regards,

Vidar