Bluetooth Low Energy example doesn't work

Ashi · 31 Dec 2017, 19:54

Hello,
I'm new in Qt, and I want to develop a program with BLE connection. I started to run "Bluetooth Low Energy Scanner" example and some other examples from the examples list. But it doesn't work correctly. The list of devices always empty.
I am using windows 10 and Qt 5.10.0
Can anyone help me please?

Ashi · 30 Dec 2017, 12:49

Can anyone help me?
I found this but still confused!
Does Qt supports Bluetooth API on Windows 10?
If yes, could you please tell me how to use it?

aha_1980 · A Ashi 30 Dec 2017, 11:51

@Ashi said in Bluetooth Low Energy example doesn't work:

Can anyone help me?
I found this but still confused!
Does Qt supports Bluetooth API on Windows 10?

By reading the docs, no. At least not until someone provides a suitable driver.

SGaist · wrote on 30 Dec 2017, 22:46

Hi and welcome to devnet,

IIRC, the wip/win branch of the module provides preliminary support for BLE. However you have to build it yourself.

Ashi · 31 Dec 2017, 11:39

Thanks @SGaist ,

I tried to do the following:
git clone git://code.qt.io/qt/qtconnectivity.git
cd qtconnectivity
git checkout wip/win

But still the same problem. The devices list is empty.
Did I do something wrong? or miss something?
Thank you very much!

mrjj · 31 Dec 2017, 12:50

@Ashi
Hi and you did also build it ?

Ashi · 31 Dec 2017, 17:41

@mrjj yes I did.

mrjj · A Ashi 31 Dec 2017, 12:50

@Ashi
and make install ?
so its installed into Qt ?

Ashi · A Ashi 27 Dec 2017, 04:24

@Ashi How can I make install?? Could you please explain?
Thanks in advance!

SGaist · 1 Jan 2018, 07:01

nmake install in the build folder if you are using Visual Studio and mingw32-make install if you are using MinGW

Ashi · wrote on 1 Jan 2018, 07:01

This post is deleted!

Ashi · 1 Jan 2018, 13:28

@SGaist After made make install I got the following:

C:\Qt\Qt5.10.0\Examples\Qt-5.10.0\qtconnectivity>nmake install

Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        cd src\ && ( if not exist Makefile C:\Qt\Qt5.10.0\5.10.0\msvc2015_64\bin\qmake.exe -o Makefile C:\Qt\Qt5.10.0\Examples\Qt-5.10.0\qtconnectivity\src\src.pro ) && "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f Makefile install

Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        cd bluetooth\ && ( if not exist Makefile C:\Qt\Qt5.10.0\5.10.0\msvc2015_64\bin\qmake.exe -o Makefile C:\Qt\Qt5.10.0\Examples\Qt-5.10.0\qtconnectivity\src\bluetooth\bluetooth.pro ) && "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f Makefile install
Project MESSAGE: perl -w C:\Qt\Qt5.10.0\5.10.0\msvc2015_64\bin\syncqt.pl -module QtBluetooth -version 5.10.1 -outdir C:/Qt/Qt5.10.0/Examples/Qt-5.10.0/qtconnectivity C:/Qt/Qt5.10.0/Examples/Qt-5.10.0/qtconnectivity
'perl' is not recognized as an internal or external command,
operable program or batch file.
Project ERROR: Failed to run: perl -w C:\Qt\Qt5.10.0\5.10.0\msvc2015_64\bin\syncqt.pl -module QtBluetooth -version 5.10.1 -outdir C:/Qt/Qt5.10.0/Examples/Qt-5.10.0/qtconnectivity C:/Qt/Qt5.10.0/Examples/Qt-5.10.0/qtconnectivity
NMAKE : fatal error U1077: 'cd' : return code '0x3'
Stop.
NMAKE : fatal error U1077: 'cd' : return code '0x2'
Stop.

And still after running the example again, the devices list is empty.

SGaist · wrote on 1 Jan 2018, 19:27

As the error suggests: you are missing Perl. Install it.

It’s normal noting changed, the module wasn’t even built.

Ashi · 1 Feb 2018, 07:06

@SGaist During installation process of QT this problem occurred:

So I clicked 'Ignore'.
Then I tried to install "C:\Qt\Qt5.10.0\Tools\Perl52213_32\strawberry-perl-5.22.1.3-32bit.msi
but nothing changed.
I tried to reinstall it and disabled Antivirus and the same error appeared.
Is there anyway to overcome this problem?

SGaist · 2 Jan 2018, 09:53

Did it install successfully ?
If so did you try to call perl from a new command prompt ?

Ashi · 2 Jan 2018, 12:58

@SGaist I restarted the Qt command line and the error that related to Perl disappeared and I got the following:


C:\Qt\Qt5.10.0\Examples\Qt-5.10.0\qtconnectivity>nmake install

Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        cd src\ && ( if not exist Makefile C:\Qt\Qt5.10.0\5.10.0\msvc2015_64\bin\qmake.exe -o Makefile C:\Qt\Qt5.10.0\Examples\Qt-5.10.0\qtconnectivity\src\src.pro ) && "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f Makefile install

Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        cd bluetooth\ && ( if not exist Makefile C:\Qt\Qt5.10.0\5.10.0\msvc2015_64\bin\qmake.exe -o Makefile C:\Qt\Qt5.10.0\Examples\Qt-5.10.0\qtconnectivity\src\bluetooth\bluetooth.pro ) && "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f Makefile install

Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f Makefile.Release install

Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /OPT:REF /INCREMENTAL:NO /DLL /SUBSYSTEM:WINDOWS /VERSION:5.10 /MANIFEST:embed /OUT:..\..\lib\Qt5Bluetooth.dll @C:\Users\kacst\AppData\Local\Temp\nm98A.tmp
Qt5Core.lib(Qt5Core.dll) : fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\link.EXE"' : return code '0x458'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe"' : return code '0x2'
Stop.
NMAKE : fatal error U1077: 'cd' : return code '0x2'
Stop.
NMAKE : fatal error U1077: 'cd' : return code '0x2'
Stop.


C:\Qt\Qt5.10.0\Examples\Qt-5.10.0\qtconnectivity>

Thanks for your response!

jsulm · A Ashi 2 Jan 2018, 09:53

@Ashi Shouldn't you "nmake install" what you cloned from the repository before?

git clone git://code.qt.io/qt/qtconnectivity.git
cd qtconnectivity
git checkout wip/win
...
nmake
nmake install

SGaist · wrote on 2 Jan 2018, 13:43

You should also use the correct command line prompt for building especially if you start with the one provided by Visual Studio.

Abdurahman_Gulamkadirov · A Ashi 27 Dec 2017, 04:24

@Ashi Sorry, I'm too late to answer this post. I think you should try with msvc compiler, not mingw