Python library to manipulate ESC/POS Printers.
In order to start getting access to your printer, you must ensure you have previously installed the following python modules:
Python ESC/POS is a library which lets the user have access to all those printers handled by ESC/POS commands, as defined by Epson, from a Python application.
The standard usage is send raw text to the printer, but in also helps the user to enhance the experience with those printers by facilitating the bar code printing in many different standards, as well as manipulating images so they can be printed as brand logo or any other usage images migh have.
Text can be aligned/justified and fonts can be changed by size, type and weight.
Also, this module handles some hardware functionalities like, cut paper, carrier return, printer reset and others concerned to the carriage alignment.
Before start create your Python ESC/POS printer instance, you must see at your system for the printer parameters. This is done with the 'lsusb' command.
First run the command to look for the "Vendor ID" and "Product ID", then write down the values, these values are displayed just before the name of the device with the following format:
xxxx:xxxx
Example: Bus 002 Device 001: ID 1a2b:1a2b Device name
Write down the the values in question, then issue the following command so you can get the "Interface" number and "End Point"
lsusb -vvv -d xxxx:xxxx | grep iInterface lsusb -vvv -d xxxx:xxxx | grep bEndpointAddress | grep OUT
The first command will yields the "Interface" number that must be handy to have and the second yields the "Output Endpoint" address.
By default the "Interface" number is "0" and the "Output Endpoint" address is "0x82", if you have other values then you can define with your instance.
The following example shows how to initialize the Epson TM-TI88IV *** NOTE: Always finish the sequence with Epson.cut() otherwise you will endup with weird chars being printed.
from escpos import *
""" Seiko Epson Corp. Receipt Printer M129 Definitions (EPSON TM-T88IV) """ Epson = escpos.Escpos(0x04b8,0x0202,0) Epson.text("Hello World") Epson.image("logo.gif") Epson.barcode Epson.barcode('1324354657687','EAN13',64,2,'','') Epson.cut()
The following example sets the printer page code to Portuguese (cp860).
from escpos import *
Epson = escpos.Escpos(0x04b8,0x0202,0) Epson.setPageCode(constants.CP_PORTUGUESE)
Currently supported page codes are:
CP_ENGLISH - PC437 (USA: Standard Europe)
CP_KATAKANA - Katakana
CP_MULTILINGUAL - PC850 (Multilingual)
CP_PORTUGUESE - [PC860 (Portuguese)]
CP_FRENCH - PC863 (Canadian-French)
CP_NORDIC - PC865 (Nordic)
CP_WINDOWS - WPC1252
CP_CYRILLIC - PC866 (Cyrillic #2)
CP_LATIN2 - PC852 (Latin 2)
CP_EURO - PC858 (Euro)If your printer support a different code page, you can send the command directly to the printer.
Command is written in the format : ESC t n , where n stands for the printer code for the code page
from escpos import *
CUSTOM_CODEPAGE = '\x1b\x74\x24' # \x1b\x74 stands for ESC t
Epson = escpos.Escpos(0x04b8,0x0202,0)
Epson.setPageCode(CUSTOM_CODEPAGE)In this case it is very important to setup the encoding which escpos will use to send strings to the printer. You can do this by:
Epson.setOutputEncoding(customEncoding)For a list of available encodings, visit http://docs.python.org/library/codecs.html
Fork with support for international code pages added by
Juliano Bittencourt juliano.bittencourt@gmail.com
https://github.com/jbittencourt/python-escpos
Original Code by
Manuel F Martinez manpaz@bashlinux.com
Please visit project homepage at: http://repo.bashlinux.com/projects/escpos.html