Greetings and thank you very much for the amazing Receiptline!

We are building an F&B POS and hope to incorporate ReceiptLine. I have a general question. We wish to provide receipt templates for customization. This requires that, at runtime, we merge data fields into the ReceiptLine markdown. Visually:

We can do this now with the:

{ OURFIELDID }

Is that the intended use? Do you have any other suggestions for this general process?

Good morning, I love your package however I can't seem to get the cash drawer to open? Printing however works fine*

I know the Star TSP143III only supports raster images without a driver hence the following workflow:

• Connect to printer using WebUSB -> Create receiptline SVG -> Convert SVG to png -> Send png to printer

Example repo: https://github.com/selenecodes/webusb-printer
Example website running said repo: https://webusb-printer.vercel.app/

This is my input string:

{image: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}

Ichigaya Terminal
1-Y-X Kudan, Chiyoda-ku
02-07-2021 21:00
{border:line; width:30}
^RECEIPT
{border:space; width:*,2,10}
BEER                   | 2|     13.00
CHIDORI                | 2|    172.80
-------------------------------------
{width:*,20}
^TOTAL             |          ^185.80
CASH               |           200.00
CHANGE             |            14.20
{code:20210207210001; option:48,hri}
{command:\x07}
{command:\x1b\x07\x0b\x37\07}

Hi, I was wondering if it is possible to print more text sizes between 1x and 2x with the correct aspect ratio.

The font size steps are extremely big.
2x font size (^^^) is about as big as I will ever print. Therefore it would be really nice to be able to print 1.5x

Could I achieve this by setting the default text size to 0.5x?

Then I would have the following result:
(none) = 0.5x
^^^ = 1x
^^^^ = 1.5x
^^^^^ = 2x
^^^^^^ = 2.5x
^^^^^^^ = 3x

Where in the code can I change this? I tried setting "textScale" to 0.5x but with no luck

Optimally I would want the following font sizes:
1x
1.25x
1.5x
1.75x
2x
2.5x
3x

Do you have support for this, or any tips?

Thanks

Some of my Menu Item Modifiers contain sizing information such as 12" or 14". But when printing with Star CloudPRNT in TastyIgniter it prints as 12" or 14". Is there anyway to print this as intended?

I can't put images and "images and text" side by side in designer:

|1
|{c:test;o:qrcode}
|2
|{c:test;o:qrcode}|
|3
{c:test;o:qrcode}|
|4
{c:test;o:qrcode}|{c:test;o:qrcode}
|5
{c:test;o:qrcode} | {c:test;o:qrcode}
|6
 a | {c:test;o:qrcode}
|7
 {c:test;o:qrcode} | a

Is this a specification?

お世話になっております。
receiptlineを使って、店舗タッチパネル発券機能を開発したいと考えております。
一点確認させてください。
店舗タッチパネルで発券すると、情報をリモートnode.jsサーバに送って、そこで処理したデータを店舗側のレシートプリンタに印刷させるということを実現できますでしょうか。サンプルを確認したところ、プリンタ情報はnode.jsサーバに存在し、リモートネットワークに存在しているプリンタを印刷させることは無理ではないかと思います。
また、receiptlineにプリンタコマンドを生成する機能があり、上記の場合、この機能を使って、店舗側のプリンタのプリンタコマンドを生成し、店舗タッチパネルに返して、そのコマンドでプリンタに印刷させるという手段があるかと思いますが、認識があってますでしょうか。
長々と失礼しました、ご確認を宜しくお願い致します。

Hi,

It would be super helpful if you would implement word wrap functionality, is that something you will implement?

Thanks

Would it be possible to send back commands buffer to the library and reverse the process to generate an SVG ?
It would be awesome if we can save some paper (♻️)

I want to generate a Test case for the library and would like to send commands back to the library and see what the print would look like if i sent the commands to the printer

for E.G,
The general use-case is like this,
[Client] -> [receiptline] -> [Commands] -> [Printer]

I would like to achieve the following,
[Client] -> [receiptline] -> [Commands] -> [receiptline] -> [SVG / Text]

This would allow me to run test cases to check the client properly,
I also append some other commands present here that are not present in the receiptline library

Could you please help me to be able to specify the baud rate with the Serial-LAN Converter?

I am using the Fujitsu FP-510 serial port model.
The default baud rate for this model is 115200 BPS.
On the other hand, the baud rate in the Serial-LAN Converter seems to be hard coded at 9600 BPS.

https://github.com/receiptline/receiptline/blob/e9da70931442d771db01a94384ba57bb66eda0ca/designer.js#L49C63-L49C63

I am now using my FP-510 with the setting changed to 9600BPS.

Additionally, the ReceiptIO project seems to be hard coded at 115200BPS.
https://github.com/receiptline/receiptio/blob/371fed0c9215f7c20275f77ee97a3827242facc5/lib/receiptio.js#L505C41-L505C41

I am now using my FP-510 settings switched.

It would be useful if the baud rate could be set in servers.json.

Thank you.

Hi! Thanks for this amazing open source project!
I use https://receiptline.github.io/designer/ to design my bill. When I downloaded the receiptline.txt and i checked it with a text editor, It' was just fine!

But!

When i used it with node.js like that:

  const doc = fs
    .readFileSync("/home/zaki/Downloads/receiptline.txt", { encoding: "utf-8" })
    .toString();

  const display = {
    cpl: 48,
    encoding: "cp437",
  };

  const svg = receiptline.transform(doc, display);
  fs.writeFileSync("/home/zaki/Documents/receiptline.svg", svg);

The image logo included in my bill is was disappeared!

I opened the SVG file with a text editor, It doesn't have the image (base64)!
It seems Like the receiptline.transform parser ignore it!
Why?

Hi @receiptline,

Things worked pretty well with Star-MC printers and the receiptline works perfect.

I tried to test on Star TSP100IIILAN or TSP143IIILAN and it did not work and it may be due to no support for ESC commands for Star 100/143 printers.

Is it possible that you could please add support for Star TSP100IIILAN? Like Epson TM-220, the Start TSP100 is also widely used by restaurants.

Could there be a work-around so that I could still use receiptline and send the print to Star-100/143? I looked at other libraries but I am very reluctant to use other library as we have already invested on reciptline for the printing.

It will be very helpful to us as we have developed everything using receiptline for local and web printing.

I really appreciate your help on this the way you helped on Epson Impact Printers.

Looks like a great library, but missing TypeScript typings.

Would be great to have them, and they can be easily maintained in a .d.ts file.

Hi @receiptline again!

Previously I would send the following command as bytes directly to kick the cash drawer:
[0x1b, 0x70, 0x00, 0x19, 0xfa]

According to the receiptline docs, the equivalent receiptine doc would be like this:
{command:\x1b\x70\x00\x19\xfa}

However, this doesn't successfully kick the cash drawer.
Am I missing something? Is there a better recommended way to do this?

PS: I'm testing on an Epson TM-T82X printer, using the following receiptline printer configuration

{
      encoding: 'gb18030', // Chinese
      command: 'escpos',
};

Dear receiptline / receiptio:

This project looks great. But as a non-node.js developer, it is difficult to get things running. A step-by-step example would be great.

I have a Epson TM-T88IV and a Star TSP100(USB version, not network version) here. I try to print on it with receiptline, but no success. I am using Ubuntu 20.04 on x86-64, the printers are on /dev/lp0 and /dev/lp1.

Could you guide me, how I can print on the Epson or Star with receiptline or receiptio? I have the designer running on localhost:8080, but I dont know where to enter the /dev/lp0 or lp1. Or even better, printing from the command line.

Thanks and Merry Christmas,

Good evening,

Is there an example on how to open the cash register via receiptline command for starsbcs?
I tried Star's built in header for opening register, but it will only work if the specified content type is "text/plain". Even so, it will print a piece of blank paper that does effectively nothing.

Code:
const starPrinterRouter = express.Router(); const printer: Printer = { cpl: 48, encoding: 'cp437', upsideDown: true, spacing: true, command: 'starsbcs', }; const order = () => {width:}
^^^Online Order
${new Date().toLocaleString('en')}
{width:4,}

|^^^2|^^Hamburger
| |Tomato, Onion, Meat sauce, Mayonnaise
| |`"Mustard
|^^^2|^^Clam chowder
| |Oyster cracker

{code:1234567890; option:code128,2,72,hri}`;

let data = order();
console.log(data);

const command = receiptline.transform(data, printer);
// remove ESC @ (command initialization) ESC GS a 0 (disable status transmission)
const bin = Buffer.from(command.slice(6), 'binary');
// const bin = Buffer.from(command, 'binary');
console.log(bin);

// res.end();
res
  .set({
    'Content-Type': 'text/plain',
    'X-Star-CashDrawer': 'start',
  })
  .status(200)
  .send(bin);`

Thanks!

Hi,

I am creating a design using the receiverline designer. However, alignment does not work properly. I am using Epson tm-t88vi thermal printer. I'm using "escpos" command.

This is my design.

`^^^^^^^^100

|"SHOP-NAME"|
|SHOP-ADDRESS-SHOULD-BE-HERE|
|SHOP-CITY|
|SHOP-COUNTRY|

|"ID | ORDER-ID|
|"DATE | ORDER-DATE|
|"TABLE | ORDER-TABLE|
|"SERVER | ORDER-SERVER|
|"TYPE | ORDER-TYPE|

|"CUSTOMER
|CUSTOMER-NAME

|X |NAME | AMOUNT|
|1 |Gazpacho (Medium Portion) | 15.65|

|"Notes
|The quick brown fox jumps over the lazy dog.

|SUBTOTAL | 30.50|
|TAX | 2.50|
|TOTAL | 33.00|`

and this is the result.

note: also divider not working properly. If I use the receiptline's own divider, emoji-like characters appear in the line.

Imagine I have this template:

const doc = `
Item | Qty | Amount
${item} | ${qty} | ${amount}
`

Now what if item has | or any other special symbol inside? The whole document is broken.

I imagined there would be a helper function like receiptline.escape(mytext) but there isn't one.

Hi

I have tested encoding with gb18030, cp936, cp949, ksc5601, cp950, big5.
It's not working,but working at cp866,cp863,cp860.
Please tell me how to fix it

"printer1": {
    "host": "127.0.0.1",
    "port": 9100,
    "asImage": false,
    "cpl": 48,
    "encoding": "gb18030", //  cp936, cp949, ksc5601, cp950, big5
    "gradient": true,
    "gamma": 0.1,
    "threshold": 1,
    "upsideDown": false,
    "spacing": true,
    "cutting": true,
    "command": "escpos"
},

Thanks!

Is there anything else suitable other than .txt?

Hello Receiptline,

I would like to use the ESC/POS printers integrated small-font.
With the small font I get 42 characters per line instead of 32 characters.
However, I would only use this small font for a certain part, the rest should remain CPL: 32 with the normal font.

With {command:\x1b\x4d\x01} I can activate the small font
when I'm done I switch back to normal font with {command:\x1b\x4d\x00}.

Now I have the problem that the text in the line is cut off after 32 characters.

Do you see a simple solution to change the CPL in between?

Thank you!

I have issues using svg-to-png and the underlying pupperteer modules due to a proxy issue. I also did not like the size and overhead that these modules bring with them.

As a result of this, I started to investigate processing the generated SVG with regular image processing tools like imagemagick, or the npm package sharp, but found these had subtle issues with processing the SVG.

I was able to resolve these issues with the following custom command, which allowed me to use sharp in the following manner:

import sharp from 'sharp'
const svg = receiptline.transform(...)
const png = await sharp(svg).png().toBuffer()

Not only is this significantly quicker than puppeteer, it is also comes with a much smaller dependency size.

My custom command is as below:

const custom = {
  ...receiptline.commands.svg,
  ...{
    close: function() {
      return receiptline.commands.svg.close.bind(this)()
        .replace('>', '><rect width="100%" height="100%" fill="white"/>')
        .replace('<filter id="receiptlineinvert" x="0" y="0" width="100%" height="100%">', '<filter id="receiptlineinvert" x="-1%" y="-15%" width="102%" height="150%">')
    },
    text: function (text, encoding) {
      let p = this.textPosition;
      const attr = Object.keys(this.textAttributes).reduce((a, key) => a + ` ${key}="${this.textAttributes[key]}"`, '');
      this.textElement += `<text${attr}>`
      for (const character of Array.from(text)) {
        const q = this.measureText(character, encoding) * this.textScale;
        const r = (p + q / 2) * this.charWidth / this.textScale;
        p += q;
        this.textElement += `<tspan x="${r}">${character.replace(/[ &<>]/g, r => ({' ': '&#xa0;', '&': '&amp;', '<': '&lt;', '>': '&gt;'}[r]))}</tspan>`;
      }
      this.textElement += `</text>`
      this.textPosition += this.measureText(text, encoding) * this.textScale;
      return '';
    },
  }
}

Most of these changes are transparent to the output, and will work fine in a browser, as well as with generic image processing tools. The only exception to this for which I have been unable to find a workaround for is the receiptlineinvert filter. Whilst what I have provided above seems to work well in an image processor or sharp, in chrome there is just a bit too much "padding" around the element.

Is there some way to incorporate these changes so that generic image processing tools can be used to process the svg?

Installing the project with npm or cloning master gives me the following error when trying to run the designer:

/mnt/d/Tools/receiptline-master$ node designer.js
node:internal/modules/cjs/loader:936
  throw err;
  ^

Error: Cannot find module 'receiptline'
Require stack:
- /mnt/d/Tools/receiptline-master/designer.js
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)
    at Function.Module._load (node:internal/modules/cjs/loader:778:27)
    at Module.require (node:internal/modules/cjs/loader:999:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (/mnt/d/Tools/receiptline-master/designer.js:23:21)
    at Module._compile (node:internal/modules/cjs/loader:1099:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:975:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/mnt/d/Tools/receiptline-master/designer.js' ]
}

Node.js v17.9.1

Is there any planning to support other programming languages!
Like Go python, dart C++, rust, ruby, php etc ...
The good thing of ReceiptLine is the use of Markdown! So the portability is fulfilled here.
You just have to remake the parser to the other programming languages!

in my opinion you have just to support SVG rendering, then the developer convert it to PNG image and print it easily, That's what i did in nodejs

An imagination example code (python):

import receiptline as rc

doc = '{code:2012345678903;option:ean,hri}'
display = (cpl: 42, encoding: 'cp437')
svg = rc.transform(doc, display)

Hello receiptline,
I have printer mC-Print2 and integration with it through AWS Lambda at node js
Here is the code

 const printer = {
            cpl: 42,
            encoding: 'cp865',
            upsideDown: true,
            spacing: true,
            command: 'starmbcs2'
        };

 res.status(200).type('application/vnd.star.starprntcore').send(Buffer.from(receiptline.transform(job, printer).slice(6), 'binary'));
 res.end()

here is the print job

{border: space; width: * 4 8}
-
|ITEM|QTY|AMOUNT|
-
Boiled salted peanuts | 1| 5.00
Tanashi cabbage with salted flavor | 1| 5.00
Shinshu lettuce salad | 1| 5.00
Ishigaki strawberry rolled cake | 1| 5.00
Peach juice from Date | 1| 5.00
-

I have tried few different config sets, but the result it's still not the best :(
With starmbcs2 it's somehow works, but not all of formatting

I've attached a photo with results

Can you please provide tips to print it correctly?
Thanks!

Hi,
i just bought star MC3-printer, i would like to send a print job with an Hebrew letters.

Additionally i need some help with the printer setup so if it's possible to get some help.

TNX.

i am using a non popular brand i can print it through official chrome printer driver.will this work for that

Updated 2022-11-09: With the latest version 1.13.0, you may not run into these issues any more, just check out receiptio and add an option -p generic, everything should be normal now.

Hi team, thanks for the great work in advance!

I would like to report a bug here, check below as a reproduction repository:

https://github.com/Ynewtime/receiptline-report

Basic description: I copied the code directly from https://github.com/receiptline/receiptio and tried to print out something, but there is always an A0 characters in the first line:

const receiptio = require('receiptio');

const receiptmd = `^^^RECEIPT

12/18/2021, 11:22:33 AM
Asparagus | 1| 1.00
Broccoli  | 2| 2.00
Carrot    | 3| 3.00
---
^TOTAL | ^6.00`;

receiptio.print(receiptmd, '-d 192.168.192.168 -p escpos -c 42').then(result => {
    console.log(result);
});

I switched another printer model but it appeared again.

So I suspect if it was related to the receiptline codebase.

Thanks again for the great work!

Hi receiptline team!

Really appreciate what you guys have done so far.

Are there any plans to support Zebra printers? (https://www.zebra.com/content/dam/zebra/manuals/printers/common/programming/zpl-zbi2-pm-en.pdf)

Hello receiptline,

I have been printing to my Bluetooth thermal printer PT-210 from my website for a long time. So far I had not done any formatting and just printed text.

Now I came across this project and I think it's great. I would like to customize my receipts and also use QR codes and a logo.

With browserify I created and integrated the receiptline-full.js.

For my first test i want to print the following:

^^^^RECEIPT

12/18/2021, 11:22:33 AM
-
|Asparagus | 1| 1.00|
|Carrot    | 3| 3.00|
-
^TOTAL | ^6.00
{code:https://receiptline.github.io/designer/; option:qrcode,3,L}

When I print out this example, the lines are not displayed correctly and the QR code is missing entirely.

I use this code and deliver the content of escPos to the BT printer

const printerEscPos = {
    cpl: 32,
    encoding: 'utf-8',    // utf-8, multilingual
    spacing: false,
    cutting: false,
    gamma: 1.0,
    command: 'impact'     // impact, escpos
};

const escPos = receiptline.transform(reader.result, printerEscPos);

BluetoothPrinter.connect()
  .then(() => {
  BluetoothPrinter.print(escPos);
});

...
    print(command) {
      var encoder = new TextEncoder("utf-8");
      var commandEnc = encoder.encode(command + '\x0a');

      console.log(commandEnc);
      console.hex(commandEnc);

      const maxLength = 100;
      let chunks = Math.ceil(commandEnc.length / maxLength);
      if (chunks === 1) {
        this._queue(commandEnc);
      } else {
        for (let i = 0; i < chunks; i++) {
          let byteOffset = i * maxLength;
          let length = Math.min(commandEnc.length, byteOffset + maxLength);
          this._queue(commandEnc.slice(byteOffset, length));
        }
      }
    }
...

Here is the console output for console.log(commandEnc) and console.hex(commandEnc)

I guess it's an ecoding problem, maybe you could give me a hint please?

Hi,

First - Thank you San for your work and sharing. This is very helpful.

We are using Star - MC3 printer and using its CloudPrint facility to send print through the REST API server as we need to print directly on the printer without any intermediate device. After looking through your markup language, I am reluctant to use Star proprietary markup language. We would like to follow a standard, that you are developing.

I ran your sample code and it works fine if I send the print commands directly to my printer in the local subnet using its IP address and port 9100. The prints are as advertised and seen through the designer - which is really very useful to visualize.

But, when I send the same command through the REST API through our API server to the printer, everything prints OK except the line.

Here is the sample code:

printCommands.js file

var doc = `
{width:auto}
|^^^^Pizza Station^^^^|

-
{width:5 *}
|^^2 @^^ |^^Royal Special Pizza |
|   |Olive, Spinach, Asparagus, Tomato  | 
|^^1 @^^ |^^12 inch Subway with basil |
-

-
{width:auto}
Delivery Station
{width:5 *}
|2 @|French Fries |
|1 @|Diet Coke |
-


{code:2012345678903;option:ean,hri}


`;
...
async function ticket() {
	// printer example
	const printer = {
		cpl: 42,
		encoding: 'cp437',
		upsideDown: false,
		gamma: 1.8,
		command: 'starmbcs'
	};
	return receiptline.transform(doc, printer); ;
}
...

The above is called in the REST API GET request sent by the printer to my API server.

var printer = require("./printCommands");
app.get('/api/v1/cloudprint', (req, res) => {
    printer.ticket().then((buffer) => {
        res.status(200).type("application/vnd.star.starprnt").send(buffer);
        toPrint = false;
    }).catch((err) => {
        console.log("Getting error in sending commands to the printer", err);
        res.status(200).end();
    });
}

I have tried starsbcs and various supported input methods from Star Link but I was not able to get the line printing properly.

I am attaching here both the prints - one sent directly to the printer (works perfectly) and another sent through REST API using CloudPrint of Star Printer.

Can you please provide tips or hacks for the time being so that I am able to print it correctly?

Thank-You San!

Hi receiptline team! I'm really loving what you guys are building so far.

I'm trying to print Simplified Chinese characters onto using escpos command on an Epson TM-T82X printer, but I'm getting gibberish instead.
For context, I'm using this in a React-Native app.
Also, it seems like Chinese printing is supported from the official docs for this specific printer model.
https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=364

Chinese

receiptline document

敏捷的棕色狐狸跳过懒狗

Printer config

const printer = {
  encoding: 'gb18030', // and cp936
  command: 'escpos',
};

Japanese

I tried printing the Japanese sample afterwards to test it and there was a similar problem

receiptline document

敏捷的棕色狐狸跳过懒狗

Printer config

const printer = {
  encoding: 'cp932', // and shiftjis
  command: 'escpos',
};

English

Here's the working English sample for comparison.

Thank you team in advance!

I would like to use my own open() for a ESC/POS printer that I work with.

However, all implementations live in a closure and there is no way to extend or provide an override.

I would expect at least something simple as:

const receipt_data = receiptline.transform(doc, {
	encoding: "cp866",
	command: "escpos",
	commands: {
		open: function (printer) { return "..." }
	},
})

Would like to know is there any possibility to have other Asian languages (e.g. Traditional Chinese) support?

If it can be done where should I get started so I could contribute a PR?

Thanks!

First of all Thanks for this amazing project!
Is there any planning to support inline images? Like this example below:
(This is an SVG printed as image)

Is there some way to send the output directly to the printer or is there some plan to implement it? It'd be too usefull. Currently, Node environment doesn't have good choices for that. Actually, I just know a lib called printer for that which has some problems and limitations.
Thank you so much.

I want to change the output font to something other than the font that is currently being used

default:
                    p.font = `'Courier Prime', 'Courier New', 'Courier', monospace`;
                    p.size -= 2;
                    p.style = '@import url("https://fonts.googleapis.com/css2?family=Courier+Prime&display=swap");';
                    break;

I am trying to make this work with a TM-T88v

While I am able to start the designer and create receipts there, I am still puzzled about how this library actually is able to send anything to a printer. In one terminal window I have this :

Virtual printer running at 127.0.0.1:19100
Server running at http://127.0.0.1:8080/

I also looked at example receiptes. Those render nicely in designer, but not sure how we would use them. Base templates?

Then I am copying the example code and running it in separate project and nothing seems to happen.

I modified the example code here with my printer IP as well as the Virtual Printer + port

const printer = {
        "host": "127.0.0.1",
        "port": 19100,   
    cpl: 42,
    encoding: 'cp437',
    upsideDown: false,
    gamma: 1.8,
    command: 'escpos'
};

When I run node testprint.js where testprint contains my code. Nothing happens.
Is this library supposed to send anything to the TM-T88v?

In short, is there a direct example that I can follow that show how I can send something to the printer via IP to print?

In contrast this library made this fairly easy:
https://www.npmjs.com/package/node-thermal-printer
I was able to run the example command and it printed an example directly to the printer
node examples/example.js tcp://x.x.x.x

Any insight is appreciated.