quick_blue Bluetooth name is empty [Windows]

When i start scan on Windows, bluetooth devices are listed. But their names are empty. However I can see their rssi and MACs.

Aug 25 '21 14:08 batuhanarslan

Sorry I'm too busy these days to resolve this issue. PRs are welcome

Aug 25 '21 15:08 Sunbreak

I'd like to close it without further info

Feb 04 '22 07:02 Sunbreak

@Sunbreak I was also facing this. I think it should be reopened.

Mar 15 '22 22:03 fotiDim

Could you provider more info?

Mar 16 '22 02:03 Sunbreak

Again one of the cases where BluetoothLEExplorer works. You seem to be using Advertisement().LocalName(). In BluetoothLEExplorer I see ShortenedLocalName and CompleteLocalName with section values 0x08 and 0x09 respectively.

Mar 18 '22 20:03 fotiDim

Again one of the cases where BluetoothLEExplorer works. You seem to be using Advertisement().LocalName(). In BluetoothLEExplorer I see ShortenedLocalName and CompleteLocalName with section values 0x08 and 0x09 respectively.

I tested ShortenedLocalName and CompleteLocalName but they didn't work

I review the code of BluetoothLEExplorer and find it use both DeviceWatcher and BluetoothLEAdvertisementWatcher.

The name is in DeviceInformation from DeviceWatcher. Advertisement is added afterwards

The logic is too complicated. I could use either BluetoothLEAdvertisementWatcher or DeviceWatcher but not both.

DeviceWatcher is necessary if you'd like to show name
BluetoothLEAdvertisementWatcher is necessary if you'd like to show manufacturerData

Mar 19 '22 14:03 Sunbreak

#71 is a simple workaround. We could use DeviceWatcher if not feasible. Looking forward to your guys feadback

Mar 20 '22 10:03 Sunbreak

I only had partial success with this. Only some devices report their name back and some others just report a generic "Bluetooth" name.

Mar 21 '22 11:03 fotiDim

I would try DeviceWatcher later.

But don't expect too much. C++/WinRT is too complicated for a plugin.

Bluetooth example from win32 may be a better solution: https://github.com/timsneath/win32/blob/main/example/bluetooth.dart

Mar 21 '22 12:03 Sunbreak

@srtonz Do you have an idea why the name is empty?

Maybe we could learn some from device-name-testing of https://github.com/JRHarrison167/flutter_reactive_ble?

Mar 28 '22 01:03 Sunbreak

@Sunbreak, it's been a while that I looked at it.

Purely from memory I think the BLE spec doesn't require for the device name to be included in the advertisement packet, but it does require a Device Name characteristic. See https://www.bluetooth.org/DocMan/handlers/DownloadDoc.ashx?doc_id=521059 sections 3.2.2.1 and 12.1 for details.

If I remember correctly the implementation in https://github.com/JRHarrison167/flutter_reactive_ble/commit/5af9ab42f3814f39c7a3602a75ec635b8d93cfba#diff-70fd061af48289fdc73361282bf0f58d42283cc57b84a00c170697ee2f2f17c8R127-R155 is naive and slow, but did correctly fetch the device name.

I think we ended up using DeviceWatcher to solve this issue, but that of course comes with a different set of challenges :-)

Mar 28 '22 01:03 srtonz

Thanks a lot. I'll try https://github.com/timsneath/win32/pull/392 first

If not feasible I would try DeviceWatcher later

Mar 28 '22 04:03 Sunbreak

Hi, Is this PR a fix for this issue? If so, I was hoping you could issue a new quick_blue release, are you thinking about it? Thanks

Aug 06 '23 09:08 nunof