cross-posted from: https://lemmy.ml/post/33289366
obligatory I know this is not a linux question, but you provide good information and alternatives
qr code is the squares code that, if used with a qr code scanner redirects me automatically to a website or to download a pkpass file, right?
after downloading said pkpass file to my android, any wallet application like fosswallet should recognize it and add it to the local library (on my android device), right?
what other formats do transportation authorities use?
To those residing in Germany, is pkpass use widespread there? What are common formats used there?
Exactly. No matter the y dimension. Barcode data is only stored in x. Whereas QR uses x and y for data.
They also use the corner squares and a few specific dots to allow scanning from greater angles. Basically allowing the data to be read in 3d space. Even though only 2d is used to store that data.
This is why QR can work well with cameras. Whereas bar codes are designed for very short range laser reflection.
PS lots of info on QR online including open source programs to make your own.
The same goes for bar codes. But readers involve some very simple maker skills. Making simple barcode readers was a common school science project in the early 90s.