The device name has disappeared from the Android Bluetooth list.

RE: The device name has disappeared from the Android Bluetooth list.

Simonr — Wed, 04 Dec 2019 09:42:15 GMT

Glad to hear you got it working. If you haven't erased the flash before now it might be that some residual code from a previous project that was flashed onto the device kept tripping you up. Seeing as I haven't been able to reproduce it on any DKs or Android versions, I'm guessing that's what happened.

Best regards,

Simon

RE: The device name has disappeared from the Android Bluetooth list.

moon.kim — Tue, 03 Dec 2019 23:49:22 GMT

I using nRF52810 DK board(PCA10040e Ver 0.9.0)

And IAR 8.10.1 & nRF5x_MDK_8_24_1_IAR_NordicLicense.msi

I Use 'ble_app_gls_pca10040e_s112' in the IAR workspace.

There was a strange thing.

I erased all flash memory and programmed it again. Now no error occurred.

I don't know why this is starting to happen.

RE: The device name has disappeared from the Android Bluetooth list.

Simonr — Mon, 02 Dec 2019 13:48:46 GMT

First off, are you using an nRF52832 DK or a DK with the nRF52810 on in this case? Can you provide a picture of your setup please? Are you using the ble_app_gls\pca10040e\s112 example?

I still don't see how you unpair the nRF52 and the phone. In the video, it seems like you just go from the toolbox app to the Bluetooth settings, and then back to the toolbox app, which should not be sufficient to unpair the devices.

Best regards,

Simon

RE: The device name has disappeared from the Android Bluetooth list.

moon.kim — Mon, 02 Dec 2019 06:55:57 GMT

FYI this is the firmware version I used.

SDK 15.0.0

Softdevice S112 6.0.0

RE: The device name has disappeared from the Android Bluetooth list.

moon.kim — Mon, 02 Dec 2019 01:53:06 GMT

Hi, Simonr

I prepared a decent video to help you understand.

The DK board just programmed the Glucose example and added one measurement data by pressing button 2.

And I use nRFConnect app.

devzone.nordicsemi.com/.../1588.mobizen_5F00_20191202_5F00_100756.mp4

RE: The device name has disappeared from the Android Bluetooth list.

Simonr — Fri, 29 Nov 2019 09:05:11 GMT

I just downgraded the phone to Android 8.1 as well, and I'm still not seeing this error. I am unable to connect to the device if I delete the bonding information on one side and not the other, as expected, but I'm not able to get the error message you mentioned. Can you try to specify how exactly you unpair the devices? Do you use the nRFConnect app at all?

Best regards,

Simon

RE: The device name has disappeared from the Android Bluetooth list.

Simonr — Fri, 29 Nov 2019 08:02:05 GMT

We did not have these particular phones in the office, but I've done some testing myself on a Google Pixel (Android 9) and a Nokia 8.1 (Android 10) and have not been able to reproduce this error. I've followed your steps both ways and tried to unpair first from both sides, but I can't seem to get the error message you're seeing.

I'll try downgrading the Pixel to Android 8.1 next to see if the issue is with the Android version. Are you able to update one of the phones on your side, or try with a newer Android version to see if that gets rid of the error as well?

Best regards,

Simon

RE: The device name has disappeared from the Android Bluetooth list.

moon.kim — Thu, 28 Nov 2019 02:51:23 GMT

Hi. Simon

I test with Xiaomi Mipad 4 (Android version 8.1) & LG X400(Android version 8.1).

[quote userid="75734" url="~/f/nordic-q-a/54798/the-device-name-has-disappeared-from-the-android-bluetooth-list/222364"]Because if you delete the bonding information on one side, you won't be able to bond with the device again before bonding information is deleted on both sides.[/quote]

And I know I have to delete both side pairing information.

But the Bluetooth list doesn't show the paired device. So I can't delete it.

Change the test method a little.

[quote userid="83275" url="~/f/nordic-q-a/54798/the-device-name-has-disappeared-from-the-android-bluetooth-list/222200"]2. Disconnect and unpair 'Nordic_Glucose' from the Bluetooth list in Android settings.[/quote]

Do not delete the pairing information from the Bluetooth list in this order, but delete the pairing information from the DK board.

RE: The device name has disappeared from the Android Bluetooth list.

Simonr — Wed, 27 Nov 2019 13:22:59 GMT

Thank you for the thorough explanation. I am not able to recreate this issue on my side though, can you give me a list of some phones you've been able to recreate the issue on and I'll try to find someone here who has one of them.

Also, just to make sure. You aren't deleting the bonding information from the phone side when disconnecting, correct? Because if you delete the bonding information on one side, you won't be able to bond with the device again before bonding information is deleted on both sides.

Best regards,

Simon

RE: The device name has disappeared from the Android Bluetooth list.

moon.kim — Wed, 27 Nov 2019 02:50:54 GMT

sorry.
I was a bit clumsy to explain.
I'm developing with a custom board and programmed using nordic's Glucose example.
I used BGM in the Nordic ToolBox App.

However, this symptom occurs even with the Glucose example source and nRF52 DK board.

This order :

1. Pair the DK board with the BGM app.

2. Disconnect and unpair 'Nordic_Glucose' from the Bluetooth list in Android settings.

3. press 'connect' again in APP, the message 'Error on connection priority request(19)' is displayed.

4. press 'connect' again in APP, and Pair with app.

5. The connected device name is not displayed in the Bluetooth list of Android settings. But now Bluetooth is connected. Thereafter, this device name will not appear in this list.

thank you

RE: The device name has disappeared from the Android Bluetooth list.

Simonr — Tue, 26 Nov 2019 14:13:51 GMT

[quote user="moon.kim"] Search and Connect using in App.[/quote]

I'm sorry, but what "Search and Connect" are you using in the app? Can you also specify what application you're using and what device on the nRF side? Is this using a DK and one of our examples or what? I'm not aware of anything that should cause a device to go invisible like you're describing.

Best regards,

Simon

RE: The device name has disappeared from the Android Bluetooth list.

moon.kim — Tue, 26 Nov 2019 09:51:35 GMT

I use nRF ToolBox app.

and Search and Connect using in App.

What would make the device invisible on the Bluetooth list?

RE: The device name has disappeared from the Android Bluetooth list.

Simonr — Tue, 26 Nov 2019 08:55:06 GMT

Are you using an Android app to connect and bond to these devices or just the default phone Bluetooth list? If you're using an app, is it the nRFConnect app or something else?

Best regards,

Simon

RE: The device name has disappeared from the Android Bluetooth list.

moon.kim — Tue, 26 Nov 2019 00:17:38 GMT

Hi, Simonr

I use several Android phones for testing.

This problem occurs on all Android phones.

I think it's related to security requests.

RE: The device name has disappeared from the Android Bluetooth list.

Simonr — Mon, 25 Nov 2019 12:48:53 GMT

What phone is it you're seeing this issue in? Have you been able to see the same issue in multiple phones or just the one?

Best regards,

Simon