Open kavinRkz opened 5 years ago
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!
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)); } ); }