Add script.

usb/blink-test-led.js

@@ -0,0 +1,35 @@
+#!/usr/bin/env node
+'use strict';
+
+var usb = require('usb');
+
+var vid = 0x16d3;
+var pid = 0x05ea;
+
+var device = usb.findByIds(vid, pid);
+device.open();
+
+var usbInterface = device.interface(0);
+if (usbInterface.isKernelDriverActive()) {
+    usbInterface.detachKernelDriver();
+}
+usbInterface.claim();
+
+var endpointIn = usbInterface.endpoints[0];
+var endpointOut = usbInterface.endpoints[1];
+
+var str = '0';
+console.log('Sending "%s"', str);
+endpointOut.transfer(str, function(err) {
+    if (err) {
+        console.error("USB error: %s", err);
+        process.exit(1);
+    }
+    endpointIn.transfer(64, function(err2, receivedStr) {
+        if (err2) {
+            console.error("USB error: %s", err2);
+            process.exit(2);
+        }
+        console.log('Received "%s"', receivedStr);
+    })
+});