Make a QR code with braille characters.

qr-braille.js

const qr = require('qrcode');
const Canvas = require('drawille');

qr.drawBitArray(process.argv[2], (err,bits,width) => {
  if(err){
    console.error(err);
    return;
  }

  let height = Math.ceil(bits.length / width);
  let canvas = new Canvas(width, height);

  for (let x = 0; x < width; ++x) {
    for (let y = 0; y < height; ++y) {
      if(bits[y * width + x]){
        canvas.set(x, y);
      }
    }
  }

  process.stdout.write(canvas.frame());
});