Chrome extension can't find USB printer device - google-chrome

Question

I am building chrome application for POS Terminal printers. The problem that I have is that chrome application for some reason can't find USB device and I am not sure why it is not working. I tried few methods (converted hexadecimal vendor/product ID to decimal, used hexadecimal product/vendor id to connect to USB printer) and all of the reports that device can't be found...
EDIT:
I got this error from device log:
Failed to open device: Operation not supported or unimplemented on this platform
Does someone know where is the problem?
Here is details about printer (DATECS DPP 255):
Manifest:
{
"manifest_version": 2,
"name": "Thermal Printer Extension",
"description": "Thermal Printer Extension for ESC/POS Commands",
"version": "1.0",
"app": {
"background": {
"scripts": ["main.js"]
}
},
"permissions": ["usb", "notifications"],
"optional_permissions": [
{
"usbDevices": [
{
"vendorId": 65520, "productId": 98
}
]
}
],
"externally_connectable": {
"matches": ["http://localhost:3000/*"]
}
}
main.js
chrome.runtime.onMessageExternal.addListener(function (stuff) {
if(stuff){
function pad(n, width, z) {
z = z || '0';
n = n + '';
return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
}
var port = 0;
var endpoint = 0x01;
// needs to be set in optional permissions for each VID/PID pair
var device = {vendorId: 0xfff0, productId: 0x0062};
// var device = {vendorId: 65520, productId: 98};
String.prototype.toBytes = function() {
var arr = [];
for (var i=0; i < this.length; i++) {
arr.push(this[i].charCodeAt(0));
}
return arr;
}
// setting variables for printing, array for data, and calculations
var alignLeft = [0x01B, 0x061, 0];
var alignCenter = [0x01B, 0x061, 1];
var alignRight = [0x01B, 0x061, 2];
var endPrint = [0x01B, 0x064, 2];
// enter new line
var lineFeed = [0x00A];
var buzz = [07];
var drawLineMiddle = "________________________________________________".toBytes();
var drawLineSmall = "________________________________".toBytes();
var horizontalTab = [0x009];
var cutpaperFull = [0x01D, 0x056, 1];
var cutpaperPartial = [0x01D, 0x056, 0];
function createAnything() {
var anything = alignCenter;
anything = anything.concat("Awesome Chrome Extension".toBytes());
anything = anything.concat(lineFeed);
anything = anything.concat(drawLineMiddle);
anything = anything.concat(stuff.stuffToPrint.toBytes());
anything = anything.concat(lineFeed);
return anything;
}
function createReceipt(devices) {
var data = [];
data = data.concat(createAnything());
data = data.concat(endPrint);
data = data.concat(cutpaperPartial);
var buffer = new Uint8Array(data).buffer;
var transferinfo = {direction: "out", endpoint: endpoint, data: buffer };
chrome.usb.bulkTransfer({handle: devices[0].handle, vendorId: devices[0].vendorId, productId: devices[0].productId}, transferinfo, function(response) {
if (response.resultCode == 0) {
chrome.usb.closeDevice({handle: devices[0].handle, vendorId: devices[0].vendorId, productId: devices[0].productId}, chrome.notifications.create("4", {type: "basic", iconUrl: "icon.png", title: "Success!", message: "Printing receipt..."}, function() {console.log("Success!")}));
} else {
console.log("Error ", response);
}
});
}
var connect = function(callback) {
chrome.permissions.getAll(function(p) {
if (p.permissions.indexOf("usb") >= 0) {
//construct permission object for our device
var obj = { usbDevices: [device] };
//now request the permissions
chrome.permissions.request({ permissions: [obj] }, function(granted) {
if (granted) {
chrome.usb.findDevices(device, function(devices) {
if (devices && devices.length > 0) {
//use the first found device
var foundDevice = devices[0];
//now lets reset the device
chrome.usb.resetDevice(foundDevice, function() {
//perform some error checking to make sure we reset the device
if ( ! chrome.runtime.lastError) {
//now claim the interface using the port we specified
chrome.usb.claimInterface(foundDevice, port, function() {
if ( ! chrome.runtime.lastError) {
callback(devices);
} else {
throw chrome.runtime.lastError.message;
}
});
} else {
throw chrome.runtime.lastError.message;
}
});
} else {
chrome.notifications.create("1", {type: "basic", iconUrl: "icon.png", title: "Error", message: "Device not found!"}, function() {console.warn("Device not found!")});
console.warn("Device not found!");
}
});
} else {
chrome.notifications.create("2", {type: "basic", iconUrl: "icon.png", title: "Error", message: "USB Permission not granted."}, function() {console.warn("USB Permission not granted.")});
console.warn("USB Permission not granted.");
}
});
} else {
chrome.notifications.create("3", {type: "basic", iconUrl: "icon.png", title: "Error", message: "No USB permissions granted."}, function() {console.warn("No USB permissions granted.")});
console.warn("No USB permissions granted.");
}
});
}
connect(createReceipt);
}
});