Printing Barcodes

Last Reviewed:2016-07-31

Most ESC/POS-printers implement barcode-printing. The barcode-commandset is implemented in the barcode-method. For a list of compatible barcodes you should check the manual of your printer. As a rule of thumb: even older Epson-models support most 1D-barcodes. To be sure just try some implementations and have a look at the notices below.

barcode-method

The barcode-method is rather low-level and orients itself on the implementation of ESC/POS. In the future this class could be supplemented by a high-level class that helps the user generating the payload.

CODE128

Code128 barcodes need a certain format. For now the user has to make sure that the payload is correct. For alphanumeric CODE128 you have to preface your payload with {B.

from escpos.printer import Dummy, Serial
p = Serial()
# print CODE128 012ABCDabcd
p.barcode("{B012ABCDabcd", "CODE128", function_type="B")

A very good description on CODE128 is also on Wikipedia.