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Questions tagged [qr-code]

QR Code is a 2D barcode that can be easily scanned using the most modern phones equipped with camera.

39 questions
132
votes
2 answers

Is it possible to create a QR code using text?

QR codes I have seen are mostly image files. But can you create QR codes using plain text? For example ASCII and UTF-8 have black boxes as characters. Can I use those together with spaces to create a QR code?
MCK
  • 1,185
31
votes
3 answers

How do you output a QR code to the linux cli terminal for scanning?

I want to be able to output a QR code to the ubuntu cli terminal where I can scan with my phone. I have a configuration file I want to convert to a QR code so I can scan it vs having to transfer it over a usb drive. Many of the google results only…
Patoshi パトシ
  • 3,219
23
votes
3 answers

How does a dynamic QR code work?

So there is this QR code that you apparently can always edit even after it has been printed. For example, see this website that offers dynamic QR codes: For example: When you make a QR code for plain text how can an independent QR code scanner see…
MCK
  • 1,185
13
votes
1 answer

WiFi QR Code format for WPA2/WPA3

I'm creating a new QR code for my WiFi guest network and with my new router it supports WPA2/WPA3 Personal (AES). I've tried multiple iterations of the auto-configuration format (which I can't find official documentation for?), but none works. I use…
Fëanorson
  • 175
5
votes
5 answers

WhatsApp web and desktop app displaying broken QR codes

I recently bought a new laptop and when I tried to set up the WhatsApp Desktop app, the QR code won't scan on my phone. The same is the case with WhatsApp Web as well. I tried doing the following things but still didn't work out: Trying WhatsApp…
Vedant Shah
  • 53
4
votes
4 answers

If I acquire a USB QR/barcode scanner, can I set it to automatically launch a browser upon reading a URL?

I'm considering purchasing a scanner such as the Esky™ Automatic USB (Bi-directional) Barcode Scanner. I've produced some QR codes (containing valid http URLs) which I'd like students at my school to scan. I'd like to use the machine as a terminal -…
turbonerd
  • 153
4
votes
2 answers

Why it is hard to read QR code displayed on CRT screen?

I created some QR code just for fun, then tried to read them with my phone. When I display them on laptops, my phone read them just fine. But when I tried to read the exact same codes displayed on CRT screen.. none of them succeeded, from the mini…
Martheen
  • 1,759
3
votes
0 answers

Pre-installed barcode/qr readers on mobile devices

There's an idea within my company to put QR codes in some of our marketing literature, and I'm trying to find some stats (or specific device info) to help me make the decision. My feeling is that, of those clients with a smartphone (BB, iOS,…
adam
  • 153
3
votes
2 answers

Text on QR barcode?

How do you get text inside of QR codes? I know i seen this more then once but here is an image from the latest example. UCM are the initials of that company.
user3109
3
votes
1 answer

QR Codes for Files on Google Code

When you download files from Google Code now (example), in addition to the text version of the SHA1 hash, it includes a QR code of it. The device that the file was downloaded to is the one that has to hash the file. But, if it can download the file…
Synetech
  • 69,547
2
votes
0 answers

save data on image that is hard to see by human but recognizable by device with camera

Anyone has any good idea to save data on image that is hard to see by human but recognizable by device with camera? Number on licence plate can be recognized by computer; QR code can be recognized by our smart phone. They are all visible to human…
Fangji Zhang
  • 21
2
votes
1 answer

Easily generating QR codes

What is the easiest way to generate QR codes? When I do a google search, lots of different sites pop up, but usually they have lots of things to fill in, and lots of options to go through. What I want is just to create a simple text-based QR code. I…
joeytje50
  • 320
2
votes
4 answers

2D barcode scanner for OS X?

What is the best QR bar code scanner for OS X?
Tesi Dolz
2
votes
2 answers

QR Code designed for print?

our company is looking to publish a desk calendar with a QR code. I know how to generate QR's, but do I need it to be a certain "resolution" or whatever if it's going to go through a professional printer? Thx!
ewitkows
  • 123
2
votes
1 answer

Can I have a QR code that will create a contact on the device?

Is it possible to create a QR code, that when scanned, will create a contact on the device? I tried NeoReader - it only scans the data (string value) I can print my Blackberry data, and that will add my BB to any other BB that scans it. Is it…
Saariko
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