python-escpos/examples/qr_code.py

import sys

from escpos.printer import Usb


def usage():
    print("usage: qr_code.py <content>")


if __name__ == '__main__':
    if len(sys.argv) != 2:
        usage()
        sys.exit(1)

    content = sys.argv[1]

    # Adapt to your needs
    p = Usb(0x0416, 0x5011, profile="POS-5890")
    p.qr(content, center=True)
Ensure QR codes have a border large enough (#235) * Ensure QR codes have a border large enough (The QR code spec requires a border at least 4box_size thick but we can't just set border=16 because that results in a QR code more than 255px tall and I'm not yet ready to use fullimage() as a backend for it) This fix was originally commited by Stephan Sokolow on 2014-05-22 Let the user print stuff using qr example * fix tests 2017-07-24 13:04:54 +00:00			`import sys`

			`from escpos.printer import Usb`


			`def usage():`
			`print("usage: qr_code.py <content>")`


			`if __name__ == '__main__':`
			`if len(sys.argv) != 2:`
			`usage()`
			`sys.exit(1)`

			`content = sys.argv[1]`

			`# Adapt to your needs`
			`p = Usb(0x0416, 0x5011, profile="POS-5890")`
First attempt at centering images and QRs (#250) This was tested on ZJ-5890 with success. By default centering is deactivated for backward compatibility. Trying to center a QR code in native mode will raise an exception as we do not know ATM if the native rendering is centered by default or not. * Added basic tests for center feature * Check image size before centering 2017-08-31 07:25:35 +00:00			`p.qr(content, center=True)`