[Interest] QtBluetooth Low Energy: How to find my peripheral?

[Prashant Vaibhav]

Oops, pasted wrong bug report link.
I meant this: https://bugreports.qt.io/browse/QTBUG-46008 <https://bugreports.qt.io/browse/QTBUG-46008>


Kind Regards,
Prashant Vaibhav



> On 12 Oct 2016, at 16:34, Prashant Vaibhav <prashant.vaibhav at tobyrich.com> wrote:
> 
> Hi Alexander,
> 
> Comments inline below. Thanks.
> 
> Kind Regards,
> Prashant Vaibhav
> 
> 
> 
>> On 12 Oct 2016, at 15:45, Alexander Blasche <alexander.blasche at qt.io <mailto:alexander.blasche at qt.io>> wrote:
>> 
>> 
>> 
>>> -----Original Message-----
>>> From: Interest [mailto:interest-bounces+alexander.blasche=qt.io <http://qt.io/>@qt-
>>> project.org <http://project.org/>] On Behalf Of Prashant Vaibhav
>>> Sent: Wednesday, 12 October 2016 13:45
>>> To: interest at qt-project.org <mailto:interest at qt-project.org>
>>> Subject: [Interest] QtBluetooth Low Energy: How to find my peripheral?
>>> 
>>> Hi all,
>>> 
>>> I’m using QtBluetooth low energy API on Qt 5.7 / Android 5/6. Targeting API level
>>> 19 (android 4.4+).
>> 
>> What are you using Qt 5.6 or 5.7?
> 
> I’m using Qt 5.7.0.
> 
>> 
>>> My problem is that I cannot find a way to decide which of the BLE devices
>>> returned during scan is mine:
>>> 
>>> - The advertising data is inaccessible (no API).
>>> - The QBluetoothDeviceInfo.serviceUuids() function returns nothing (apparently
>>> it’s for classic bluetooth)
>>> - The QBluetoothDeviceInfo.name() function is null (empty string)
>> 
>>> So the only information I have is the rssi (QBluetoothDeviceInfo.rssi()), which is
>>> not enough to figure out the scanned device is ours. Furthermore, I cannot show
>>> a list to the user to pick the device manually, since all it will have is the signal level
>>> (and perhaps MAC address).
>> 
>> 
>> I believe you may experience https://bugreports.qt.io/browse/QTBUG-54867 <https://bugreports.qt.io/browse/QTBUG-54867>.
>> 
>> It was fixed in Qt 5.6.2 and 5.7.1. Alternatively you may cherry-pick the referenced patches into your Qt build.
> 
> Thanks for the link, I checked and it doesn’t seem relevant to my issue. Our BLE device doesn’t have major/minor numbers in its advertising packet. It does have the primary service UUID (128 bit) which we are using to identify it on iOS (native code).
> 
> Perhaps you meant https://bugreports.qt.io/browse/QTBUG-54867 <https://bugreports.qt.io/browse/QTBUG-54867> ?
> 
>> 
>> --
>> Alex

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