EP739 RS232 protocol function list
Copyright © 2004 Optoma Inc.
V.C04
Interface
3 wires RS-232C Protocol
Baud Rate : 9600
Data Bits: 8
Parity: None
Stop Bits: 1
Flow Control : None
Command Sequence
Write
Header :
Address Code :
Basic Protocol
‘*’
‘0’ fixed
Command Code : ASCII Text
Data : Fixed 3 digits
Terminator Code : Carriage Return
Delimiter : Space Carriage Return
Command Sequence
Read
Basic Protocol
Header
Address Code
Command Code
Data
‘*’
‘0’ fixed
ASCII Text
‘?’ fixed
Terminator Code Carriage Return
Delimiter
Carriage Return
Acknowledgement
Basic Protocal
Receive OK
˝*000<CR>˝
˝*255<CR>˝
˝*001<CR>˝
Unknown Command
Invalid Command
In current source
Data value out of range
Data response
˝*002<CR>˝
As Write Command Format
Function List
Basic(Original)
Basic (Update)
OKOKOKOKOK
* 0 IR 002
* 0 IR 003
* 0 IR 004
Power On
Power Off
Source PC
Keystone
Zoom (*3)
Mute
* 0 IR 001
* 0 IR 002
* 0 IR 003
* 0 IR 004
* 0 IR 005
* 0 IR 006
* 0 IR 005
* 0 IR 006
1
To further enhance the viewing experience of the audience – more precise commands
are added to minimize the disruption during a source change.
Furthermore, to avoid confusion with old RS232 commands and possible software
maintenance problem the silent OSD are implemented using new RS232 commands.
The side benefit of this implementation is user choose silent OSD or non-silent OSD
just by invoking different RS232 commands
IR 030
IR 031
IR 032n
source lock on
source lock off
source select n=1 is DVI-D
n=2 is DVI-RGB (*1)
n=3 is DVI-YPbPr (*1)
n=4 is D-sub RGB
n=5 is D-sub YPbPr (include 480i, 480p, 720p, 1080i, 576i, 576p)
n=6 is D-sub SCART
n=7 is RCA YPbPr (include 480i, 480p, 720p 1080i, 576i,
576p)(*2)
n=8 is composite
n=9 is S-video
IR 033n
aspect ratio n=1 is 4:3
n=2 is 16:9
n=3 is window = 4:3 inside 16:9
n=4 is letterbox
IR 034nn brightness
IR 035nn contrast
IR 036nn volume
IR 037nn zoom
nn= 00-99, 99 is the brightest
nn=00-99, 99 is highest contrast
nn=00-99, 99 is loudest
nn=0-31, 31 is maximum zoom
IR 038n
color temperature n=1 is low
n=2 is medium
n=3 is high
New read commands (not related to silent mode)
ID ?
returns ID x
x= any unique ID such as serial no.
Hour?
returns “HR nnnn\r” nnnn= lamp hours in 4 digits
*1: select to DVI
*2: Not support
3
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