ESC/POS Printer driver for node
$ npm i escpos
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, if you have multiple printers use
getDevices to switch between printers.
Triggers the callback function when done.
Claims all the printers connected to the machine, one by one. When done, sets the first printer found as the default device and triggers the callback function.
Returns the number (N) of printers connected, if open is called you must open each device in order to use it.
The ID of the printer will be the number you want to set from 0 to N-1.
Sets the index passed as the current device, N must be higher than 0 and lower than
This must be called before printing if you want to swtich between multiple printers connected to the same device.
Closes the current device and releases its USB interface.
close() but loops through all the devices connected and closes them all.
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.
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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