About escpos

This is a Golang package that provides ESC-POS library functions to help with sending control codes to a ESC-POS thermal printer.

It was largely inspired by seer-robotics/escpos but is a complete rewrite.

It implements the protocol described in this Command Manual

Current featureset

• Initializing the Printer
• Toggling Underline mode
• Toggling Bold text
• Toggling upside-down character printing
• Toggling Reverse mode
• Linespace settings
• Rotated characters
• Align text
• Default ASCII Charset, Western Europe and GBK encoding
• Character size settings
• UPC-A, UPC-E, EAN13, EAN8 Barcodes
• QR Codes
• Standard printing mode
• Image Printing
• Printing of predefined NV images

Installation

Install the package via the following:

go get -u github.com/hennedo/escpos

Usage

The escpos package can be used as the following:

package main

import (
	"github.com/hennedo/escpos"
	"net"
)

func main() {
	socket, err := net.Dial("tcp", "192.168.8.40:9100")
	if err != nil {
		println(err.Error())
	}
	defer socket.Close()

	p := escpos.New(socket)

	p.Bold(true).Size(2, 2).Write("Hello World")
	p.LineFeed()
	p.Bold(false).Underline(2).Justify(escpos.JustifyCenter).Write("this is underlined")
	p.LineFeed()
	p.QRCode("https://github.com/hennedo/escpos", true, 10, escpos.QRCodeErrorCorrectionLevelH)



	// You need to use either p.Print() or p.PrintAndCut() at the end to send the data to the printer.
	p.PrintAndCut()
}