Non-scannable advertising

RE: Non-scannable advertising

Jason — Wed, 21 Oct 2020 07:21:51 GMT

Thank you Simon, that's much appreciated. I will look at whitelisting later today.

if this affects a significant proportion of handsets (sold in the last ~5 years) then an easy solution might be to alternate the advertising as scannable and non-scannable. I already do this for connectable advertising and I only had scannable advertising until recently. I will try to test the nrf sniffer later today also. (too much to do!)

Thank you!

RE: Non-scannable advertising

Simonr — Wed, 21 Oct 2020 05:54:41 GMT

Hi Jason

First, I have asked internally to check if we have a list of phones that but have not been able to find one as of yet I'm afraid. If you want to disable the scan response altogether you will have to implement the whitelisting indeed, but if you have already set the scan response packet and length to 0 in your application that should be fine for most central devices as far as I know.

Best regards,

Simon

RE: Non-scannable advertising

Jason — Tue, 20 Oct 2020 12:31:25 GMT

Do I need to implement whitelisting if the device is advertising as BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED ?

RE: Non-scannable advertising

Jason — Mon, 19 Oct 2020 12:16:32 GMT

Correct, no connections from the non-scannable advertising. Just a few bytes of sensor data etc.

I allow connections briefly if the device is turned on it's head. I change the advertising and I have no problems. The scan response then contains the service UUID.

RE: Non-scannable advertising

Simonr — Mon, 19 Oct 2020 12:04:53 GMT

Hi Jason

You can check if there is an empty scan response by using a sniffer device (I.E. the nRF sniffer) to sniff all data that is transmitted on the BLE band. It does indeed seem like you have not disabled the scan response completely, as that is only possible if you use the whitelist advertisement feature.

I'm sorry, but we do not have a list of which phones this would be. I still think the devices should be able to scan for these devices, but may have issues if you want to connect to the peripheral, but it seems like you're not going to connect to these devices, correct?

Best regards,

Simon