S130 and scan performance potential issue

RE: S130 and scan performance potential issue

Fabien Comte — Fri, 25 Sep 2015 14:02:21 GMT

Yes that was the idea, ok i understand the limitation. I will try the observer. Thank you.

RE: S130 and scan performance potential issue

Petter Myhre — Wed, 23 Sep 2015 09:21:00 GMT

I don't understand what you mean. Are you asking if you can scan on the channels used for connections? Then the answer is no. You scan on the three advertising channels. As you may know, it is possible to advertise on one channel, but our SoftDevice does not currently support scanning on only one channel. Please see this question for more information. If I have misunderstood you, please let me know.

RE: S130 and scan performance potential issue

Fabien Comte — Tue, 22 Sep 2015 17:03:38 GMT

I understand if scanning share the same radio frontend you can just work on a channel at a time. But is there any way to do a kind of passive scan (use the channels sequences of connections) because emiters will transmit on the 3 bands in this case and i will increase my probability ?

RE: S130 and scan performance potential issue

Petter Myhre — Tue, 22 Sep 2015 14:39:21 GMT

You only have one radio. It can either scan or handle a connection event. By setting the scan window equal to the scan interval you tell the SoftDevice to scan 100 % of the time, and more connection events will be dropped. You can read more about this in the S130 SoftDevice Specification, see this. I'm not sure what connection interval you are actually using, but I recommend you to try different settings and see if you can get results that fulfill your requirements.

RE: S130 and scan performance potential issue

Fabien Comte — Tue, 22 Sep 2015 14:29:03 GMT

Sorry for the answer Mr Myhre, i corrected and moved it into the question.

RE: S130 and scan performance potential issue

Petter Myhre — Mon, 21 Sep 2015 13:32:39 GMT

You are not very specific. Could you please include what connection and scan parameters you are using? What do you mean by performance? Throughput? Latency? What are your requirements? What kind of performance do you expect? What are fast scan and fast connections?