Unable to Read QRcode

[hakyung9712]

Hi, I want to try reading QRcode with your code. But I have some problems.

Before showing the situation, I get the code from your "openxr" branch. And print QRcode in your blog. When I turn off the app, the green box shows above the QRcode.

When I build the Scene1, the text don't change after the "Initializing QR tracker attempt 1". And when I build the Scene2, the airplane and tracker shows, but the QR displayer doesn't show the QRCode information like link .. or something.

I am trying to this so much time and I really want your help... Thanks

[LocalJoost]

Hello! I just built the app with Scene 1 and deployed, and it worked fine:

What you might need to do is move the QR code a bit closer to your head, a bit further away, and look at it from a straight angle. Also, I have found out that the smaller the QR code, the harder it is to recognize for the HoloLens. Finally, remember the HoloLens cameras are basically sitting on your forehead. So if you hold the code before your eyes, you might be holding them too low.

Good luck. I am sure it works. The fact you can show the airplane proves it.

[Patsufr]

Hi, i have the same problem. When i try to detect your Qr this happening with visual studio : When I try without visual studio nothing happens like hakyung9712. Do you have any ideas ? Thanks you.

[LocalJoost]

• What branch did you pull?
• What version of Unity do you use?
• Did you build for Master?

I can tell you, running from Visual Studio does not make any sense. You are now debugging a generated C++ application.

If deploy and build Scene 1, I get this: If I deploy and build Scene 2, I get this: https://user-images.githubusercontent.com/47092708/154894557-66d44c0d-05d6-45d0-9c89-47dd1479d978.jpg

From what you send me I can tell nothing

[Patsufr]

I tried your main branch and your blog1 branch. I used 2019.4.34f1 I build for release.

Thank you about Visual Studio i'm beginner in this domain.

[LocalJoost]

So the best branch to pull is https://github.com/LocalJoost/QRCodeService/tree/slightly_improved_version

Have you read my blog post about this? and then especially the end. It has very specific build instructions.

• Build with Unity 2019.4.17 LTS or higher 2019 LTS version but not Unity 2020 or 2021
• Make sure you have selected Target SDK and Minimum platform version 18362
• Make sure you have selected Universal Windows Platform
• Make sure you have selected ARM64 and D3D.
• Target Platform versions are set to 18632 or higher
• Deploy to HoloLens 2 using Visual Studio 2019, platform toolset 142 and build settings Master/ARM64

[Patsufr]

I will try that ! Thanks I come back to you

[hakyung9712]

I found I was using Unity 2020. I will try and come back. Thanks!

Also, I have a question. Can only one QR code be recognized? I found "Local Qr Value" in Qr Tracker Controller.

[LocalJoost]

@hakyung9712 If you want to use Unity 2020, pull branch https://github.com/LocalJoost/QRCodeService/tree/openxr and read this follow up article