Unfortunately, there may be two different types of documentation: user docs and programmer docs. You need the programmer docs. Those are usually a bit harder to come by.

From the information you have provided, it looks like the you could probably use the Device::USB::Device::bulk_read method. Unfortunately, without the docs, you have quite a bit of reverse-engineering to make sense of the data in that packet.

Honestly, it would definitely be worth your time to check with the company to see if they have any programming documentation. Debugging a binary protocol is not always the best use of time.

I though you were the author

I am. That was supposed to be a little joke. (It turned out to be even smaller than expected.<shrug/>)

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.