README
¶
About escpos
This is a simple Golang package that provides ESC-POS library functions to help with sending control codes to a ESC-POS capable printer such as an Epson TM-T82 or similar.
These printers are often used in retail environments in conjunction with a point-of-sale (POS) system.
Installation
Install the package via the following:
go get -u github.com/knq/escpos
Example epos-server
An example EPOS server implementation is available in the epos-server subdirectory of this project. This example server is more or less compatible with Epson TM-Intelligent printers and print server implementations.
Usage
The escpos package can be used similarly to the following:
package main
import (
"bufio"
"os"
"github.com/knq/escpos"
)
func main() {
f, err := os.Open("/dev/usb/lp3")
if err != nil {
panic(err)
}
defer f.Close()
w := bufio.NewWriter(f)
p := escpos.New(w)
p.Init()
p.SetSmooth(1)
p.SetFontSize(2, 3)
p.SetFont("A")
p.Write("test ")
p.SetFont("B")
p.Write("test2 ")
p.SetFont("C")
p.Write("test3 ")
p.Formfeed()
p.SetFont("B")
p.SetFontSize(1, 1)
p.SetEmphasize(1)
p.Write("halle")
p.Formfeed()
p.SetUnderline(1)
p.SetFontSize(4, 4)
p.Write("halle")
p.SetReverse(1)
p.SetFontSize(2, 4)
p.Write("halle")
p.Formfeed()
p.SetFont("C")
p.SetFontSize(8, 8)
p.Write("halle")
p.FormfeedN(5)
p.Cut()
p.End()
w.Flush()
}
TODO
- Fix barcode/image support
- Update code to be idiomatic Go
- Fix example server implementation
Documentation
¶
Index ¶
- Constants
- type Escpos
- func (e *Escpos) Barcode(barcode string, format int)
- func (e *Escpos) Cash()
- func (e *Escpos) Cut()
- func (e *Escpos) CutPartial()
- func (e *Escpos) End()
- func (e *Escpos) Feed(params map[string]string)
- func (e *Escpos) FeedAndCut(params map[string]string)
- func (e *Escpos) Formfeed()
- func (e *Escpos) FormfeedN(n int)
- func (e *Escpos) Image(params map[string]string, data string)
- func (e *Escpos) Init()
- func (e *Escpos) Linefeed()
- func (e *Escpos) Pulse()
- func (e *Escpos) Raster(width, height, bytesWidth int, imgBw []byte)
- func (e *Escpos) ReadRaw(data []byte) (n int, err error)
- func (e *Escpos) ReadStatus(n byte) (byte, error)
- func (e *Escpos) SendEmphasize()
- func (e *Escpos) SendFontSize()
- func (e *Escpos) SendMoveX(x uint16)
- func (e *Escpos) SendMoveY(y uint16)
- func (e *Escpos) SendReverse()
- func (e *Escpos) SendRotate()
- func (e *Escpos) SendSmooth()
- func (e *Escpos) SendUnderline()
- func (e *Escpos) SendUpsidedown()
- func (e *Escpos) SetAlign(align string)
- func (e *Escpos) SetEmphasize(u uint8)
- func (e *Escpos) SetFont(font string)
- func (e *Escpos) SetFontSize(width, height uint8)
- func (e *Escpos) SetLang(lang string)
- func (e *Escpos) SetReverse(v uint8)
- func (e *Escpos) SetRotate(v uint8)
- func (e *Escpos) SetSmooth(v uint8)
- func (e *Escpos) SetUnderline(v uint8)
- func (e *Escpos) SetUpsidedown(v uint8)
- func (e *Escpos) Text(params map[string]string, data string)
- func (e *Escpos) Write(data string) (int, error)
- func (e *Escpos) WriteNode(name string, params map[string]string, data string)
- func (e *Escpos) WriteRaw(data []byte) (n int, err error)
Constants ¶
const ( // DLE ASCII DLE (DataLinkEscape) DLE byte = 0x10 // EOT ASCII EOT (EndOfTransmission) EOT byte = 0x04 // GS ASCII GS (Group Separator) GS byte = 0x1D )
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Escpos ¶
type Escpos struct {
// contains filtered or unexported fields
}
Escpos container
func (*Escpos) CutPartial ¶
func (e *Escpos) CutPartial()
CutPartial send cut minus one point (partial cut)
func (*Escpos) FeedAndCut ¶
FeedAndCut feed and cut based on parameters
func (*Escpos) ReadStatus ¶
ReadStatus Read the status n from the printer
func (*Escpos) SendEmphasize ¶
func (e *Escpos) SendEmphasize()
SendEmphasize send emphasize / doublestrike
func (*Escpos) SetFontSize ¶
SetFontSize set font size
Source Files
Directories