brother-pt-labeler v0.1.2

brother-pt-labeler

A node.js library to print labels on a Brother label printer using the Internet Printing Protocol (IPP).

• Tested on Brother PT-P750W.
• Although poorly written, Brother's PT-E550W/P750W/P710BT Raster Command Reference documentation is useful for implementation details.

How to print a PNG file

First, you will need the IP address of your printer. The port for IPP is usually 631 and the path is usually /ipp/print. Please refer to your printer's manual for further information. Next, you will need a PNG file to print. Currently, PNG is the only file format supported by this library.

Existing PNG

const { printPngFile } = require('brother-pt-labeler');
const printerUrl = 'http://192.168.178.71:631/ipp/print';
const tapeWidth = 12;

printPngFile(printerUrl, `./samples/name-tag-${ tapeWidth }mm.png`, { 
  tapeWidth,
  highResolution: false,  
});

Create PNG using node-canvas and print using printBuffer command:

const { printBuffer } = require('brother-pt-labeler');
const { createCanvas, Image } = require('canvas');
const util = require('util');
const pngparse = require('pngparse');

const printerUrl = 'http://192.168.178.71:631/ipp/print';
const tapeWidth = 18;
const tapeWidthDots = 128; // 18mm
  
const canvas = createCanvas(400, tapeWidth);
const ctx = canvas.getContext('2d', { pixelFormat: 'A1' });
ctx.antialias = 'none';
ctx.font = `50px Arial`;
ctx.fillStyle = 'rgba(0,0,0,1)';
ctx.fillText('This is a test', 0, 0);
const palette = new Uint8ClampedArray([
  255, 255, 255, 255,
  0,  0,  0, 255,
]);
printBuffer(printerUrl, canvas.toBuffer('image/png', { palette },
  { 
    tapeWidth,
    highResolution: false,  
  },
));

See the samples folder example png's.

PNG height vs Tape Width

Considerations

Since this library is based on IPP it needs (raw, i.e. TCP) network access. This limitation implies that you cannot use this library in a web browser, where Javascript can only do HTTP/WebSocket requests. You can use this library on the server-side or in an ElectronJS desktop application.