New Feature!

[peterroe]

I want to do something with this nice repo: support config of size.

Such as:

$ qrcode-terminal https://github.com/peterroe -w 300
$ qrcode-terminal https://github.com/peterroe -w 100

It will output QRcode with different size.

[filimonic]

How it is expected to work?

QR codes have 40 standard sizes (called versions), each size have it's own dimensions in modules (squares).
Sizes vary from version 1 (21x21) to 40 (177x177).

Also each QR code has capacity, varying from 72 bits (code version 1, error correction level H) to 23648 bits (code version 40, error correction L)

The minimal size (version) of QR Code for specific data depends on error correction level only.
If you make QR code with higher version (size in modules) than it needs to be, it is just a waste of capacity.

So, on-screen QR code size may me scaled up only by multiplying by natural number (x2, x3,...) (make each module fill 1x1 on-screen cell, 2x2, 3x3 etc.)

[peterroe]

Well. Can we reduce the size of the QR code by reducing the error tolerance? My original claim is actually that my console is small enough to output the QR code on a single screen.

[filimonic]

Well. Can we reduce the size of the QR code by reducing the error tolerance? My original claim is actually that my console is small enough to output the QR code on a single screen.

When using command line mode, it seems that L (lowest) ErrorCorrection level is used. You can not specify EC level using command line now, and you can not drop EC level below L

[filimonic]

You can reduce QR code size by reducing dsts by changing alphabet used in data.

Sizing is Byte mode > Alphanumeric mode (A-Z upper, 0-9, some special chars) > Numbers only.

[peterroe]

Hi. Thanks for your reply. I have a question, Where I can do this:

Sizing is Byte mode > Alphanumeric mode (A-Z upper, 0-9, some special chars) > Numbers only.

[filimonic]

UPD My bad.
It SHOULD be switched automatically. Encoding phrases 1234567890, ABCDEFGHIJ, abcdefghij SHOULD give different amount of bits => this amount may fit different QR code sizes. 123... is encoded using Numerical, and it is smallest. ABC... is encoded using alphanumerical. abc... is encoded using Byte and is largest

But instead, author decided to use always Byte encoding, and this is why it is not working for this tool