unable to print the Qrcode in epson TMp20 model

[kavinRkz]

unable to print the Qrcode any one give an better sollution for this

window.DatecsPrinter.listBluetoothDevices( function (devices) { window.DatecsPrinter.connect(devices[0].address, function() { printMyQRCode(); }, function() { alert(JSON.stringify(error)); } ); }, function (error) { alert(JSON.stringify(error)); } );

function printMyQRCode() { window.DatecsPrinter.printQRCode( 4, // qr code size 4, // qr code error correction 'http://www.datecs.bg', // barcode data function() { alert('success!'); }, function() { alert(JSON.stringify(error)); } ); }

[csleeds]

if your case happens to be print out the text alone, it might due to your printer is not supported to print by this way, try this instead which i amended based on the sample from read me file:

//Create QR Code with node-qrcode package
//https://github.com/soldair/node-qrcode

var QRCode = require('qrcode');

//Generate the QR image
QRCode.toDataURL('http://www.datecs.bg/', { errorCorrectionLevel: 'H', width: 250 }, function (err, url) {

    var canvas = document.createElement('canvas');
    canvas.height = 250;
    canvas.width = 250;
    var context = canvas.getContext('2d');
    var image = new Image();
    image.src = url;

    image.onload = function () {
        context.drawImage(image, 0, 0);
        var imageData = canvas.toDataURL('image/jpeg').replace(/^data:image\/(png|jpg|jpeg);base64,/, ""); //remove mimetype
        window.DatecsPrinter.printImage(
            imageData, //base64
            canvas.height,
            canvas.width,
            //align
            1,
            function () {
                //alert("Print Qrcode cmd sent!");
            },
            function (error) {
                alert(JSON.stringify(error));
            }
        );
    };
});

Let me know if it works for you too, cheers!