gistfile1.js

var usb = require('usb');

var my_drive = usb.findByIds(4901, 49193);

my_drive.open();

interfaces = my_drive.interfaces[0];

interfaces.claim()

inEndpoint = interfaces.endpoints[0];

outEndpoint = interfaces.endpoints[1];

var data_sent = new Buffer('100300', 'hex');

inEndpoint.transferType = 2;
inEndpoint.startStream(1, 64);
inEndpoint.transfer(64, function (error, data) {
    if (!error) {
        console.log(data);
    } else {
        console.log(error);
    }
});
inEndpoint.on('data', function (data) {
    console.log(data);
});
inEndpoint.on('error', function (error) {
    console.log(error);
});
outEndpoint.transferType = 2;
outEndpoint.startStream(1, 64);
outEndpoint.transfer(new Buffer('d\n'), function (err) {
    console.log(err);
});

//ep_out.transfer('  ', function(err) {
  //if(err) {
    //console.log(err);
  //}
  //else {
    //console.log('success');
  //}
//});
//
//var data = new Buffer('100300', 'hex');
//
//interf.write(data)
//
//interf.transfer(10, function(err, data) {
  //console.log(data);
//});
//
//my_drive.close();