ESC/POS Printer driver for node
$ npm i escpos --save
if you use usb as an adapter :
libudevto build libusb.
sudo apt-get install build-essential libudev-dev.
Otherwise you will get
LIBUSB_ERROR_NOT_SUPPORTED when attempting to open devices.
const escpos = ;// Select the adapter based on your printer typeconst device = ;// const device = new escpos.Network('localhost');// const device = new escpos.Serial('/dev/usb/lp0');const printer = device;device;
Claims the current device USB, if the printer is already in use by other process this will fail.
By default, the USB adapter will set the first printer found .
Triggers the callback function when done.
Closes the current device and releases its USB interface.
Escpos inherits its methods to the printers. the following methods are defined:
Prints raw text. Raises TextError exception.
Carrier feed and tabs.
align is a string which takes any of the following values:
Set text properties.
align set horizontal position for text, the possible values are:
font type could be A or B. Default: A width is a numeric value, 1 is for regular size, and 2 is twice the standard size. Default: 1 height is a numeric value, 1 is for regular size and 2 is twice the standard size. Default: 1
Prints a barcode.
code is an alphanumeric code to be printed as bar code barcode_type must be one of the following type of codes:
width is a numeric value in the range between (1,255) Default: 64 height is a numeric value in the range between (2,6) Default: 3 position is where to place the code around the bars, could be one of the following values:
font is one of the 2 type of fonts, values could be:
Raises BarcodeTypeError, BarcodeSizeError, BarcodeCodeError exceptions.
mode set a full or partial cut. Default: full Partial cut is not implemented in all printers.
*** Don't foget this, because cut will flush buffer to printer ***
Sends a pulse to the cash drawer in the specified pin.
pin is a numeric value which defines the pin to be used to send the pulse, it could be 2 or 5. Raises `CashDrawerError()``
Copyright (c) 2015 lsong
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