lyhourchhen/thermal-driver

🖨️ ESC/POS Printer driver for Node.js.

@node-escpos

🖨️ ESC/POS Printer driver for Node.js.

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demo.mp4

[📢 RFC] Recently I'm working on a new workflow that prints the receipt. HTML+CSS will customize the content. Theoretically, we can print anything that we want. The workflow is like this:

1. 🎨 rendering

<div id="label-dom"> Label/Receipt </div>

2. 📸 capturing

const screenshort = await capture(document.getElementByID("label-dom"))

3. 🧾 printing

const printer = await printer.image(screenshort, "s8")
printer.cut().close()

But my full-time job is very busy. So the progress is slow, And any sponsorship will encourage me to work more actively in the open-source community.

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Improvements

• 🛠 TypeScript.
• 📦 pnpm.
• 🟢 vitest.
• 🚀 More stable maintenance.
• 🔴 Printing by HTML+CSS(WIP).
• 💡 More ideas.
• ...

Packages

• @node-escpos/core

• @node-escpos/adapter

• @node-escpos/console

• @node-escpos/screen

• @node-escpos/server

• @node-escpos/network-adapter

• @node-escpos/usb-adapter

• @node-escpos/serialport-adapter

• @node-escpos/bluetooth-adapter

Example

import { Printer, Image } from "@node-escpos/core";
// install escpos-usb adapter module manually
import USB from "@node-escpos/usb-adapter";
// Select the adapter based on your printer type
import { join } from "path";

const device = new USB();

device.open(async function(err){
  if(err){
    // handle error
    return
  }

  // encoding is optional
  const options = { encoding: "GB18030" /* default */ }
  let printer = new Printer(device, options);

  // Path to png image
  const filePath = join("/PATH/TO/IMAGE");
  const image = await Image.load(filePath);

  printer
    .font("a")
    .align("ct")
    .style("bu")
    .size(1, 1)
    .text("May the gold fill your pocket")
    .text("恭喜发财")
    .barcode(112233445566, "EAN13", { width: 50, height: 50 })
    .table(["One", "Two", "Three"])
    .tableCustom(
      [
        { text: "Left", align: "LEFT", width: 0.33, style: "B" },
        { text: "Center", align: "CENTER", width: 0.33 },
        { text: "Right", align: "RIGHT", width: 0.33 },
      ],
      { encoding: "cp857", size: [1, 1] }, // Optional
    )
    
  // inject qrimage to printer
  printer = await printer.qrimage("https://github.com/node-escpos/driver")
  // inject image to printer
  printer = await printer.image(
    image, 
    "s8" // changing with image
  )

  printer
    .cut()
    .close()
});

• See ./examples/demo/test for more examples.

Sponsors

License

MIT License © 2022 Dohooo