Scanning on Coded PHY and 1M PHY with softdevice Controller

RE: Scanning on Coded PHY and 1M PHY with softdevice Controller

Amanda Hsieh — Wed, 12 Feb 2025 16:49:03 GMT

You can check the release notes for versions between 1.9.1 and 2.6.2.

RE: Scanning on Coded PHY and 1M PHY with softdevice Controller

stathisv — Wed, 12 Feb 2025 16:29:45 GMT

I had the same issue when using nRF Connect SDK v1.9.1, ie even by setting the scanning window to less than 50% of the scanning interval it was only scanning 1M PHY devices. However, after I upgraded to v2.6.2 of the SDK it seems to be working as expected. Is it known to be fixed in some version in between?

RE: Scanning on Coded PHY and 1M PHY with softdevice Controller

jonas.woerner — Fri, 13 Sep 2024 10:17:44 GMT

I am using a nRF52840DK. Thanks a lot for testing this, Its Interesting that it works like that. I will try to reproduce your findings and then search for whats propably a bug in my own code then. Will report if I get it solved :)

RE: Scanning on Coded PHY and 1M PHY with softdevice Controller

Amanda Hsieh — Thu, 12 Sep 2024 14:59:57 GMT

Hi,

Are you using nRF52840DK? If not, could you test on nRF52840DK?

I think there might be a bug in your code - something that is very easy to miss. BT_CONN_LE_OPT_CODED is not the same as BT_LE_SCAN_OPT_CODED. The first is for connection establishment, the second one is for scanning.

I tried using the samples peripheral_hr_coded and central_hr_coded in NCS 2.6.1 where I changed the scan parameters and the connection establishment parameters to what the customer wanted (see attached patch devzone.nordicsemi.com/.../1057.sample_5F00_diff.patch). That works as expected.

If the above doesn't help, please provide the project to investigate the issue.

RE: Scanning on Coded PHY and 1M PHY with softdevice Controller

jonas.woerner — Thu, 12 Sep 2024 14:25:53 GMT

yes, I know. But I want to use the softdevice controller... and Im using the correct parameters and its not working? Or what am I missing?

RE: Scanning on Coded PHY and 1M PHY with softdevice Controller

Amanda Hsieh — Thu, 12 Sep 2024 14:17:52 GMT

Yes, for the softdevice controller.

ZLL supports all combinations of varying interval and window simultaneously on both phy, and also simultaneous continuous scanning on both phy. Scanning wraps around other active roles, only when in continuous scanning, I.e. interval equals window. Mix of continuous on one phy and windowed on other phy too is supported, where continuous scanning wraps around windowed scanning.

RE: Scanning on Coded PHY and 1M PHY with softdevice Controller

jonas.woerner — Wed, 11 Sep 2024 14:03:29 GMT

But the criteria that Hung bui mentioned are obeyed here? Window is less then half of the Interval...

RE: Scanning on Coded PHY and 1M PHY with softdevice Controller

Amanda Hsieh — Tue, 10 Sep 2024 17:08:59 GMT

Hi,

Check out my colleague's answer in this post.

Regards,
Amanda H.