Ensemble Designs BrightEye NXT 410 Clean HDMI Router - Manual (Page 106)

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BrightEye NXT 410/415/430 Compact Router Installation, Configuration and Operations Guide
Message Structure
This section describes the message structure supported in the GV Performer ASCII Protocol.
A message consists of a Message Header followed by Command Data (Cmd Data). The Message
Header consists of 5 bytes of information (described below). The Command Data portion can vary in
size depending on which commands and how many commands are included within it.
The general message structure is as follows:
Syntax: <CR><Adr High><Adr Low><Len High><Len Low><Cmd Data>
<CR> Carriage return (0DH).
Part of the Message Header.
<Adr High> High byte of Performer Switch 1 Address.
Part of the Message Header.
This is ignored, but must be valid ASCII hex digit.
(E.g. ‘0’ to ‘9’ or ‘A’ to ‘F’).
<Adr Low> Low byte of Performer Switch 1 Address.
Part of the Message Header.
This is ignored, but must be valid ASCII hex digit.
(E.g. ‘0’ to ‘9’ or ‘A’ to ‘F’).
<Len High> High byte of byte count for Cmd Data.
Part of the Message Header.
Must be valid ASCII hex digit.
(E.g. ‘0’ to ‘9’ or ‘A’ to ‘F’).
<Len Low> Low byte of byte count for Cmd Data.
Part of the Message Header.
Must be valid ASCII hex digit.
(E.g. ‘0’ to ‘9’ or ‘A’ to ‘F’).
<Cmd Data> Zero or more commands consisting of valid ASCII
characters.
Commands
This section describes the commands in the GV Performer ASCII Protocol that are supported by the
BrightEye NXT Router. Commands in the original protocol that are not supported by the BrightEye NXT
Router will simply be ignored.
The commands described here fit into the <Cmd Data> field of the message described in “Message
Structure” above on this page.
Note that multiple commands may be sent in a single message up to a maximum of 251 bytes.