watchAdvertisements() should return a "sentinel" object about web-bluetooth

[reillyeon]

Scan frequency will always be limited by what the underlying platform allows but the idea of providing a sentinel object is to make that visible to the application so that it can restart the scan session after an interval.

[niklasdahlheimer]

Any news on this topic?

After calling watchAdvertisements() on a selected device (filter has keepRepeatedDevices= true) the advertisementreceived-eventListener stops after a few seconds (tested with Chrome 112.0.5615.137 on MacBook Pro 2021).
Afterwards the device object still has watchingAdvertisements = true set, but thats obviously wrong. Further calls to watchAdvertisements() have no effect. So it's not possible to monitor advertisement parameters of bluetooth devices continuously.

[reillyeon]

Thanks for pointing out the problem with the watchingAdvertisements attribute as well.

We're tracking this on the implementation side as Chromium issue 1345995 which is blocking marking watchAdvertisements() as a stable API.

[niklasdahlheimer]

Thanks for referencing the issue @reillyeon !

So, is there currently any way to scan continuously or in regular intervals with this API at all?

I didn't received any scan results using requestLeScan() which I assume is caused by this issue.