nRF Connect Mobile fails to scan any BLE device

RE: nRF Connect Mobile fails to scan any BLE device

Aleksander Nowakowski — Tue, 26 Apr 2022 15:54:27 GMT

Yes, that's just mean that your phone doesn't support Phy Coded.

RE: nRF Connect Mobile fails to scan any BLE device

MDF — Tue, 26 Apr 2022 15:53:07 GMT

Hello + THANK YOU

it was the "offloaded scan batching" setting, this one was enabled ( I didn't do that )
After disabling, the scanning works again without problems.

The "Physical Layer" setting is grayed out, it is "all supported" - but I'm not able to change it ... is this normal ?

Matthias

RE: nRF Connect Mobile fails to scan any BLE device

Aleksander Nowakowski — Tue, 26 Apr 2022 12:48:13 GMT

[quote userid="104149" url="~/f/nordic-q-a/86964/nrf-connect-mobile-fails-to-scan-any-ble-device/364640#364640"]

I noticed that, while scanning, there is no progress indicator, is this normal ?

The app just shows the button "stop scanning" and thats it. When wiping on the screen downwards, I see a glimpse of the round progress indicator, but when I lift my finger off the screen, its gone.

[/quote]

Yes, that is normal.

[quote userid="104149" url="~/f/nordic-q-a/86964/nrf-connect-mobile-fails-to-scan-any-ble-device/364640#364640"]no filter is set[/quote]

Mind, that the default filter excludes some devices (they are crossed out).

One more thing. Perhaps you did modify the settings of the scanner. Try going to Settings -> Scanner.

Ensure the Physical Layer (PHY) is set to All supported and Offloaded scan batching is disabled.

Did you try a different phone?

RE: nRF Connect Mobile fails to scan any BLE device

MDF — Mon, 25 Apr 2022 08:55:17 GMT

Hello Aleksander

I checked all these things: I'm using version 4.25.3, Location and GPS is enabled, permission is granted, no filter is set ... but still "no devices found". It seems to work in 1-2 % of all cases, but usually the app says "no devices found"

Is there any additional diagnostic I can use or run ?

I noticed that, while scanning, there is no progress indicator, is this normal ?

The app just shows the button "stop scanning" and thats it. When wiping on the screen downwards, I see a glimpse of the round progress indicator, but when I lift my finger off the screen, its gone.

I experienced this morning a behaviour (as described above) that the app seemed to perform a scan. Usually devices will pop up on the screen as they are found, but in this case it took some 10-20 seconds and suddendly there was a list of a dozen devices on the screen. In this case the RSSI graph shows some fragments, but is not updated.

With the "LightBlue" scanner, I see a list of devices within a few seconds, so I guess its not my smartphone,

regards, Matthias

RE: nRF Connect Mobile fails to scan any BLE device

Aleksander Nowakowski — Wed, 20 Apr 2022 08:00:42 GMT

Hello MDF,

Few weeks ago we released an updated version of nRF Connect for Android, adding support for Android 12, but on older devices all features should not be affected.

I would recommend:

Check if you have the latest version of nRF Connect for Mobile app, that is 4.25.3 (link)
Check if Location is enabled in your system. It's usually available in Quick Settings. It doesn't have to be set to GPS.
Check if you have the location permission granted to the nRF Connect app. You should have it, otherwise the app would complain.
Check if your filter isn't set to some value that excludes all devices you have. Click the X button on the right. Latest version also excludes devices from Apple, Microsoft, Google, Samsung and Exposure Notification Service packets. This also can be changed in the filter.

With the above, and Bluetooth enabled, the devices should show up on the list.

RE: nRF Connect Mobile fails to scan any BLE device

AHaug — Tue, 19 Apr 2022 10:52:44 GMT

Hi Matthias,

Apologies for the late response time. The office has been closed due to the recent holidays.

[quote user=""]Of course I tried to uninstall the App, bootet my SmartPhone and tried all the obvious things, still, no scanning results.[/quote]

Glad to hear that you've already tried this. If you have one available, could you try with a different android phone?

I've asked internally if the android app team knows the answer to this issue and will reply back to you as soon as I know more. Hopefully I will get a reply within this working week (Friday).

Kind regards,
Andreas