Cyrillic

[Denis Zakharenko]

Thanks for the nice library.
There is one question.
How to send Russian characters for printing?
If you write a text in Russian, incomprehensible characters come out, apparently a conversion is needed.

[Hendrik Fellerhoff]

Thats a good question. Could you check if its enough to set the character code table to cyrillic?

To do that execute the following command before you call p.Write():

p.WriteRaw([]byte{0x1B, 0x74, 0x11})

If it does not work, could you provide me with an example code snippet and your printer model number?

[Denis Zakharenko]

At the same time, this printer correctly prints Cyrillic from other programs
Sam4S ELLIX50D printer model

Test code

package main

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

func main() {
	socket, err := net.Dial("tcp", "10.10.4.31:6001")
	if err != nil {
		println(err.Error())
	}
	defer socket.Close()

	p := escpos.New(socket)
	p.Size(2, 2).Write("TEST ROW 1")
	p.LineFeed()
	p.Size(2, 2).WriteRaw([]byte{0x1B, 0x74, 0x11})
	p.LineFeed()

	p.Size(2, 2).Write("TEST ROW 3")
	p.LineFeed()
	p.Size(2, 2).Write("TEST ROW 4")
	p.LineFeed()
	p.Size(2, 2).Write("TEST ROW 5")
	p.LineFeed()
	p.LineFeed()
	p.LineFeed()
	p.LineFeed()
	p.LineFeed()

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

[Denis Zakharenko]

Any other suggestions on how to use the Russian text?

[Hendrik Fellerhoff]

I will have time to dig deeper into this at the weekend.. Could you clarify one more thing, cause I am not that familiar with cyrillic.. In your example you used latin alphabet characters, do you expect them to get printed in cyrillic, or is it supposed to be cyrillic letters in the code -> cyrillic letters out of the printer?

[Denis Zakharenko]

I will have time to dig deeper into this at the weekend.. Could you clarify one more thing, cause I am not that familiar with cyrillic.. In your example you used latin alphabet characters, do you expect them to get printed in cyrillic, or is it supposed to be cyrillic letters in the code -> cyrillic letters out of the printer?

I inserted English words in the lines as an example, so that you could see exactly where the Cyrillic should be

[Denis Zakharenko]

I found another code like this on github
https://github.com/bamarni/escpos/blob/master/charset.go

Page 17 [PC866: Cyrillic #2]
Page 34 [PC855: Cyrillic]
Page 46 [WPC1251: Cyrillic]

Perhaps there is an answer to the application of the desired encoding, only the question of how to apply

[Denis Zakharenko]

As I found on the Internet, it is necessary to send in 866 encoding, but I could not check it

[Hendrik Fellerhoff]

based on the link, I build a working solution, I will need to think about how to integrate it elegantly in the library but you could use this code for now:

package main

import (
        "github.com/hennedo/escpos"
        "golang.org/x/text/encoding/charmap"
        "net"
)

func main() {
        socket, err := net.Dial("tcp", "192.168.8.41:9100")
        if err != nil {
                println(err.Error())
        }
        defer socket.Close()

        p := escpos.New(socket)
        p.Size(2, 2).WriteRaw([]byte{0x1B, 0x74, 0x11})
        p.LineFeed()

        enc := charmap.CodePage866.NewEncoder()
        a, e := enc.String("ТЕСТОВЫЙ РЯД 3") // thanks google translate
        if e != nil {
                println(e)
        }
        p.Size(2, 2).Write(a)
        p.LineFeed()

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

This works at least for my EPSON TM 20II

[Denis Zakharenko]

This is just wonderful! Everything works and is displayed correctly. You may need to add this to your README.

[Denis Zakharenko]

Thank you very much!