VideoReQuest Protocol Guide v1.1.2 - 5/18/04
Phone (518) 899-1254
•
Fax (518) 899-1251
•
www.request.com
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1 -
I
NTRODUCTION
This document describes how to communicate with the VideoReQuest via IR, Serial, or
Ethernet. For Serial and Ethernet, we will also explain how data feedback is formatted.
Serial and Ethernet protocol is identical in terms of commands sent to the VideoReQuest and
feedback received from the VideoReQuest. For the purpose of simplicity, Serial and Ethernet
communication will be referred to as Serial in this document.
C o n v e n t i o n s U s e d
1)
Throughout this document, we will use the lowercase ‘H’ (
h
) notation when we wish to
denote a Hexadecimal number. Multi-Byte strings will be written as “XX
h
, YY
h
, …”.
Examples:
•
The Hex number 39 will be written as 39
h
, which is 57 in ASCII, or the number 9
•
The Hex string 4AC5 will be written as 4A
h
, C5
h
.
2)
VRQ
and
VideoReQuest
will be used synonymously to describe the VideoReQuest line
of products.
