Rs-232 Protocol Syntax; Requests - HP xp8010 series Reference

RS-232 protocol syntax

The following describes the general elements of RS-232 protocol syntax. For details
about a specific keyword, refer to the "RS-232 keyword listing" on page 10.
✎
This manual uses the symbols "<CR>" and "<LF>" to represent a carriage return and
line feed, respectively.

Requests

Commands are sent to the projector as "requests," which consist of an asterisk (*)
prefix, a command keyword, any needed parameter, and a carriage return <CR> as a
terminator:
* keyword = parameter <CR>
Requests can contain only ASCII alphanumeric characters. Blanks (spaces) are
allowed, except within keywords and numbers. Line feeds <LF> are ignored.
The following table shows the specific syntax to use for various requested tasks.
To perform this task...
Change a setting to a specified value
Query a setting
Increment a setting
Decrement a setting
Invoke an action (no parameter needed)
Some requests to modify a particular setting also modify other related settings. For
example, a request to modify the active input source might also modify settings such
as brightness or white intensity to suit the new source. This and other requests can
produce delayed (asynchronous) notifications — see page 9 for examples.
6
Use this request syntax
*keyword=value<CR>
*keyword=?<CR>
*keyword=+<CR>
*keyword=–<CR>
*keyword<CR>
RS-232 protocol reference