RE: 【Qingdao Promrand intelligent】broadcast intervals

Albert Qiu — Thu, 16 Jun 2022 23:11:43 GMT

Hi Terje,

Thank you very much for your professional answer.

RE: 【Qingdao Promrand intelligent】broadcast intervals

tesc — Thu, 16 Jun 2022 15:44:14 GMT

Hi,

If you are talking about the random delay added to advertising intervals in BLE, then no, those random delays cannot be removed and cannot be set to a fixed value. They are an integral part of the Bluetooth specification. Among other things, they are designed for:

reducing repeated packet collision between two advertisers using the same (or coinciding) advertising intervals
ensuring advertiser and scanner will eventually advertise/scan at the same time, for the packet to be successfully scanned

Depending on the use case, there might be other alternatives such as periodic advertising, which will run on a fixed schedule. With periodic advertising, normal advertisements are sent (with random delay) but there is a second train of advertisements with a fixed interval, using the connection channels instead of the advertising channels. This allows other devices to tune in to a periodic broadcast. Periodic advertising is supported by the SoftDevice Controller subsystem in nRF Connect SDK.

Regards,
Terje