LG RL-JT10 Owner's Manual page 52

External control device setup
RS-232 Protocol
Communication Parameter
• Baud Rate : 19200 bps
• Data bit:8
• Parity : none
• Stop bit : 1
• Flow Control : none
• Communication code : Hexa code
• COM Port : COM1, COM2, COM3, COM4
Command List
Key-code List
01. POWER
02. MENU
03. SOURCE
04. ENTER
05. E
06. F
07. G
08. D
09. -
10. +
11. AUTO
Operating List
01. RGB Video Contrast
Brightness
Red
Green
Blue
02. AV Video
Contrast
Brightness
Color
Tint
03. Setup Keystone
Flip Horizontal
04.Audio Volume
Protocol
Packet header
[Magic Number][Type][Payload Size][CRC]
[Magic Number] : It's a default value to confirm packet
line up of 2 byte (0xEFBD-Set ID).
[Type] : 1 byte. It shows type of packet (key-code
or operation).
[Payload Size] : 2 byte. It shows a data byte of Command
Data (Packet Payload).
[CRC] : 2 byte. It shows CRC (Cyclic Redundancy
Check). The CRC includes packet header and
packetpayload.
51
12. STILL
13. ZOOM -
14. ZOOM +
15. MUTE
16. BLANK
17. MOUSE L
18. MOUSE R
19. MOUSE DRAG
20. RESIZE
21. KEYSTONE -
22. KEYSTONE +
0~100
0~100
0~100
0~100
0~100
0~100
0~100
0~100
0~100
78~178
Toggle
0~100
Packet payload
- Keycode packet type
[Input Type][Input Action]
[Input Type] : 2 byte. It displays IR input or Keypad input.
[Input Action] : 2 byte. It shows a Keycode.
Example : 0x25 shows left arrow button operation.
- Operation packet type
[Operation Action][Operation][Value]
[Operation Action]: It sets Set, Get, Initialize, Increment,
Defrement, Execute.
[Operation] : It shows GUI operation ,such as
Brightness, Contrast.
[Value] : It shows a value for set command which doesn't
use other operation action.
key-code list
01.Power
[Magic Number][Type][Payload Size][CRC]
[Input Type][Input Action]
Magic Number : 0xEFBD-Set ID
Type 2 : Keycode Type
Payload Size 4 : 4byte Payload size
Input Type 1 : IR Input
Input Action 18 : Power On/Off
02.Menu
[Magic Number][Type][Payload Size][CRC]
[Input Type][Input Action]
Magic Number : 0xEFBD-Set ID
Type 2 : Keycode Type
Payload Size 4 : 4byte Payload size
Input Type 1 : IR Input
Input Action 17 : Menu On/Off