modify readme

Author: lsongdev

README.md

@@ -157,9 +157,18 @@ Raises `CashDrawerError()``
 
 ----
 
+## Screencast
+
+![IMG_1031.JPG](./screencasts/IMG_1031.JPG)
+
+----
+
 ## Thanks
 
 + Part of code from [@taoyuan](https://github.com/taoyuan)
++ [Jose Vera](https://github.com/jor3l)
++ [Sébastien Vidal](https://github.com/Psychopoulet)
++ [Yu Yongwoo](https://github.com/uyu423)
 
 ----
 

adapter/usb.js

@@ -76,32 +76,22 @@ util.inherits(USB, EventEmitter);
  * @return {[type]}            [description]
  */
 USB.prototype.open = function (callback){
-
   let self = this, counter = 0, index = 0;
   this.device.open();
-
   this.device.interfaces.forEach(function(iface){
-
     (function(iface){
-
       iface.setAltSetting(iface.altSetting, function(){
-
         // http://libusb.sourceforge.net/api-1.0/group__dev.html#gab14d11ed6eac7519bb94795659d2c971
         // libusb_kernel_driver_active / libusb_attach_kernel_driver / libusb_detach_kernel_driver : "This functionality is not available on Windows."
         if ("win32" !== os.platform()) {
-
           if(iface.isKernelDriverActive()) {
-
             try {
               iface.detachKernelDriver();
             } catch(e) {
               console.error("[ERROR] Could not detatch kernel driver: %s", e)
             }
-
           }
-
         }
-
         iface.claim(); // must be called before using any endpoints of this interface.
         iface.endpoints.filter(function(endpoint){
           if(endpoint.direction == 'out' && !self.endpoint) {
@@ -114,15 +104,11 @@ USB.prototype.open = function (callback){
         } else if(++counter === this.device.interfaces.length && !self.endpoint){
           callback && callback(new Error('Can not find endpoint from printer'));
         }
-
       });
-
     })(iface);
-
   });
-
   return this;
-  
+
 };
 
 /**

examples/index.js

@@ -1,13 +1,12 @@
 'use strict';
 const escpos = require('../');
 
-const device  = new escpos.USB();
+const device  = new escpos.USB(0x0416, 0x5011);
 // const device  = new escpos.Network('localhost');
 // const device  = new escpos.Serial('/dev/usb/lp0');
-
 const printer = new escpos.Printer(device);
 
-device.open(function(){
+device.open(function(err){
 
   printer
   .font('a')

package.json

@@ -1,6 +1,6 @@
 {
   "name": "escpos",
-  "version": "2.4.2",
+  "version": "2.4.3",
   "description": "ESC/POS Printer driver for nodejs",
   "main": "index.js",
   "scripts": {
@@ -17,7 +17,8 @@
   "author": "lsong",
   "contributors": [
     "Jose Vera <[email protected]>",
-    "Sébastien Vidal <[email protected]>"
+    "Sébastien Vidal <[email protected]>",
+    "Yu Yongwoo <[email protected]>"
   ],
   "license": "MIT",
   "bugs": {