my brother just bought multiple Gl-Inet Routers (Flint, Beryl AX, Brumme2) and was about to setup Wireguard. Here he was getting a reproducible bug.
If you are generating a WireGuard config at the flint web frondend and your browser is in dark mode, another device is not able to scan the code.
If you are switching to light mode, everything works well.
In my experience the quiet zone should have roundabout 2 modulus (the width of one line in a QR code is called modulus) and not less than 4 px.
I think this will be the same for other devices than the Flint, as well.
Thanks for the hint with the manual border. But my mobile browser got no console.
The behavior does not only depends on the Phone/Cam, it also depends on the scanning app. If the app is able to read inverse codes (I know some industrial scanners), it is most likely to read also without quiet zone. This is not standard!
Since there is a lot of malware around in the Play Store I recommend all users to use the standard apps as possible. Since Android 9 the standard android cam is able to read barcodes (if it is not replaced with something vendor specific). Even if the result will be ‘could not handle this file’.
Yes, you are right, the iPhone is more tolerant to scan. I have no Apple device with me, at the moment.
We don’t need to discus, because the ‘quiet zone’ is part of the QR Code Standard … But I’ll test:
Mobile
Android
App
dark
light
Sony Xperia IV 10
13
Standard
no
yes
Sony Xperia IV 10
13
WireGuard
no
yes
Motorola Moto G8 Plus
10
Standard
no
yes
Motorola Moto G8 Plus
10
Barcode Scanner (ZXing Team)
no
yes
Google Nexus 7
11 (Lineage 18.1)
Standard App
no
no
Google Nexus 7
11 (Lineage 18.1)
WireGuard
no
yes
For more tests I need to charge the phones.
I would be interested if it works in the WireGuard App on an iPhone.
I need to setup my lab network, to test with manual border.
Thanks for testing, we will add the border in the next version.
But I am a little worried that it may be due to color difference or other reasons, can you test it directly with this image? It added 4px border.