Extra commands

The LG owner's manual documents a lot of things you can send to the TV over RS232. But there are many more that they didn't mention. I found that the command "MC" can send any button press that you could send via the IR remote, plus many more. e.g. MC 2 is VOL+, MC 3 is VOL-. Using the tv script from the TV hacks page, you'd do the following (assuming you've already set up your PC to talk to the TV over a null modem cable, etc):

Turn volume up a notch: ./tv.sh mc 2

I went ahead and tried the full range of values. There are many that work, some that return "err" from the TV and so don't work at all -- and yet a few that don't return error but also don't appear to do anything either. Still researching that (you know, it's open source firmware maybe I should go read the source? nah....) The ones labeled "Self diag" all present the same OSD screen listing self-test results, but now I can't get them to show. They didn't seem very useful anyway.

It's interesting there is no MC command to set the aspect ration to "Just scan" -- but you can do this with "kc 9" so it's not a big deal for me.

One final note: "mc 5b" (exit) is a very useful command because it will immediately hide any OSD that pops up. So if you want to adjust something but not have an OSD obscuring your screen for long you can send this command to get the display back more quickly.

If you look in the source provided by LG, there are a number of these listed in kernel_src/drivers/kdriver/micom/titania3/firmware/Source/IR/IR_CUS03_DTV.h

Supposedly the IN_STOP, IN_START and EZ_ADJUST are FA, FB and FF -- but I don't have any luck with them.

Here's what I've found so far of the MC codes:

0 Ch +

1 Ch -

2 Vol +

3 Vol -

6 Right

7 Left

8 power (toggle

9 mute (toggle)

a SAP

b Input menu (toggle)

e Sleep Timer

f Tuner (tv input)

10 #0

11 #1

12 #2

13 #3

14 #4

15 #5

16 #6

17 #7

18 #8

19 #9

1a Recent Channels (flashback)

1e Favorites list

28 Back

30 Picture mode?

39 Captions on/off (quick menu)

40 Up

41 Down

43 Menu

44 OK/Select/Enter

45 Quick Menu

4d Picture mode (quick menu)

52 Sound mode

53 Channel list (not confirmed)

5a Input: AV1

5b Exit

61 Blue button

63 Yellow button

71 Green button

72 Red button

76 Aspect 4:3

77 Aspect 16:9

79 Aspect Quick Menu

7c My Media

7e Simplink Menu

84 Vol80

85 Vol30

86 Vol50

87 Vol100

88 Sets serial port to 115200 baud, not sure what else? (avoid if in doubt!)

8e FF (not confirmed)

8f REW (not confirmed)

95 Energy Saving Toggle

98 next input

a4 Self Diag

a5 Self Diag

a8 Storage function?

aa Full info

ab EPG (not confirmed)

ad Self Diag

af Zoom

bc Self Diag

bd Stop

be Self Diag

bf Input: Comp

c5 Power off

c6 Input: HDMI1/2

c8 My media / exit

ca USB Device (quick menu)

cb Adjust (not confirmed)

cc Input: HDMI2

ce Input: HDMI1

d0 Input: AV2

d1 Info (brief)

d4 Info (brief)

d5 Input: VGA

d6 Input: Tuner (toggle antenna)

d7 Input: VGA

d9 Info (brief)

da Info (brief)

e9 Info (brief)

f0 Input: Tuner (toggle antenna -- source calls this tv_radio)