139 lines
3.2 KiB
ReStructuredText
139 lines
3.2 KiB
ReStructuredText
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*****
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Usage
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*****
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Define your printer
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-------------------
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USB printer
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^^^^^^^^^^^
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Before start creating your Python ESC/POS printer instance, you must see
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at your system for the printer parameters. This is done with the 'lsusb'
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command.
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First run the command to look for the "Vendor ID" and "Product ID", then
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write down the values, these values are displayed just before the name
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of the device with the following format:
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::
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xxxx:xxxx
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Example:
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::
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# lsusb
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Bus 002 Device 001: ID 04b8:0202 Epson ...
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Write down the the values in question, then issue the following command
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so you can get the "Interface" number and "End Point"
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::
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# lsusb -vvv -d xxxx:xxxx | grep iInterface
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iInterface 0
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# lsusb -vvv -d xxxx:xxxx | grep bEndpointAddress | grep OUT
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bEndpointAddress 0x01 EP 1 OUT
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The first command will yields the "Interface" number that must be handy
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to have and the second yields the "Output Endpoint" address.
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**USB Printer initialization**
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::
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Epson = printer.Usb(0x04b8,0x0202)
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By default the "Interface" number is "0" and the "Output Endpoint"
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address is "0x01", if you have other values then you can define with
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your instance. So, assuming that we have another printer where in\_ep is
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on 0x81 and out\_ep=0x02, then the printer definition should looks like:
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**Generic USB Printer initialization**
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::
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Generic = printer.Usb(0x1a2b,0x1a2b,0,0x81,0x02)
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Network printer
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^^^^^^^^^^^^^^^
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You only need the IP of your printer, either because it is getting its
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IP by DHCP or you set it manually.
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**Network Printer initialization**
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::
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Epson = printer.Network("192.168.1.99")
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Serial printer
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^^^^^^^^^^^^^^
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Must of the default values set by the DIP switches for the serial
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printers, have been set as default on the serial printer class, so the
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only thing you need to know is which serial port the printer is hooked
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up.
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**Serial printer initialization**
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::
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Epson = printer.Serial("/dev/tty0")
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Other printers
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^^^^^^^^^^^^^^
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Some printers under /dev can't be used or initialized with any of the
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methods described above. Usually, those are printers used by printcap,
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however, if you know the device name, you could try the initialize
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passing the device node name.
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::
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Epson = printer.File("/dev/usb/lp1")
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The default is "/dev/usb/lp0", so if the printer is located on that
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node, then you don't necessary need to pass the node name.
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Define your instance
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--------------------
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The following example demonstrate how to initialize the Epson TM-TI88IV
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on USB interface
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::
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from escpos import *
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""" Seiko Epson Corp. Receipt Printer M129 Definitions (EPSON TM-T88IV) """
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Epson = printer.Usb(0x04b8,0x0202)
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# Print text
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Epson.text("Hello World\n")
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# Print image
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Epson.image("logo.gif")
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# Print QR Code
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Epson.qr("You can readme from your smartphone")
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# Print barcode
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Epson.barcode('1324354657687','EAN13',64,2,'','')
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# Cut paper
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Epson.cut()
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How to update your code for USB printers
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----------------------------------------
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Old code
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::
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Epson = escpos.Escpos(0x04b8,0x0202,0)
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New code
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::
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Epson = printer.Usb(0x04b8,0x0202)
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Nothe that "0" which is the interface number is no longer needed.
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