QML Bluetooth Example Problem

ideadesigner · wrote on 19 Jun 2016, 16:31

Hello Everyone,

I'm a new developer on QT and I'm a student.
I want to create mobile applications but firstly trying to run "QML Bluetooth Scanner" example on desktop.
But, when I want to run this example,
QT Console says: "Dummy backend running. Qt Bluetooth module is non-functional"
and bluetooth scanner doesn't work. My bluetooth adapter is working smoothly.
How can I solve this problem ?

Platform: Windows 7 Pro
Qt Version: 5.7

SGaist · 20 Jun 2016, 09:31

Hi and welcome to devnet,

There's a WIP branch for Desktop Windows support in the QtConnectivity module that you can build and try.

ideadesigner · S SGaist 19 Jun 2016, 21:06

@SGaist
Which branch did you refer?
This link right or wrong?
And how can I integrate this branch to my qt creator ?

SGaist · 22 Jun 2016, 19:01

Yes, that's the one

Clone the module
Checkout the branch
Build it (you can open the project within Qt Creator)
Install it

And you should be good to go.

ideadesigner · 22 Jun 2016, 19:32

@SGaist
How can i clone or branch off the repo. Because there is no button on this page.

kshegunov · wrote on 22 Jun 2016, 19:32

@ideadesigner

How can i clone or branch off the repo. Because there is no button on this page.

This should cover it.

SGaist · wrote on 22 Jun 2016, 22:57

The links are on the summary page. Otherwise that's basic git

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

ideadesigner · wrote on 23 Jun 2016, 21:00

@kshegunov
I took git setup and installed.
@SGaist
I tried but gave me permission error:

$ git clone http://code.qt.io/cgit/qt/qtconnectivity.git/tree/
fatal: could not create work tree dir 'tree': Permission denied

Thanks for your helping guys.

SGaist · 24 Jun 2016, 03:51

Retry by copying the git command I wrote.

ideadesigner · S SGaist 23 Jun 2016, 22:05

@SGaist Same answer from Git with your URL

kuzulis · wrote on 24 Jun 2016, 05:31

git clone git://code.qt.io/qt/qtconnectivity.git

SGaist · 24 Jun 2016, 09:28

Because you added tree again at the end ? Don't do it, just clone the git repository.

ideadesigner · 24 Jun 2016, 10:21

@kuzulis I tried your URL in different computer and no problem.
@SGaist No, I didn't add the 'tree'. I think the problem is 'https://' because 'git://' is worked.

SGaist · wrote on 24 Jun 2016, 09:38

Strange… Anyway, the essential part is that you got the module and can continue to hack :)

kshegunov · wrote on 24 Jun 2016, 10:21

@ideadesigner @SGaist

I may be absolutely wrong and please correct me if I am, but I think https requires (gerrit) authentication to work ...

kuzulis · wrote on 24 Jun 2016, 11:19

requires (gerrit) authentication to work

yes

ideadesigner · wrote on 24 Jun 2016, 22:42

I can't understand, at my pc, 'git bash' gave me same error with 'git://...'.

$ git clone git://code.qt.io/qt/qtconnectivity.git
fatal: could not create work tree dir 'qtconnectivity': Permission denied

SGaist · 26 Jun 2016, 10:04

Permission denied ? Do you have write permission in the folder you're trying to clone in ?

ideadesigner · S SGaist 25 Jun 2016, 20:11

@SGaist I see. I understood my fault.
I worked respectively in pictures,
1.Wrong folder

2.Changed my folder

3.Changed my branch

4.Opened the qt project file and ran the btscanner example

5.Still same answer

kuzulis · wrote on 26 Jun 2016, 17:33

Still same answer

You should re-build && re-install QtConnectivity from the wip/win branch: make && make install, and only then try to use examples.

PS: A good idea it is cleanup all existing QtBluetooth stuff from your Qt-installed directory, before making-installing of wip/win branch.