Important:
This document is applicable to the following products and models.
NovoDisplay DK4 series DK434, DK554, DK654, DK754 and DK854.
Serial Port Settings
| Item | Value |
| Baud Rate | 115200 |
| Data Bits | 8 |
| Stop Bits | 1 |
| Parity | None |
| Communcation interface | HEX |
RS232 Command List
| Function | Mode | Code | Remark |
| Power | On | 55 00 8E 00 E3 | Power on |
| POWER | OFF | 55 00 8E 0F F2 | Power off |
| Menu | Input Source | 55 00 80 00 D5 | Open input source menu |
| Navigation | Up | 55 00 00 01 56 | Up |
| Navigation | Down | 55 00 00 02 57 | Down |
| Navigation | Left | 55 00 00 03 58 | Left |
| Navigation | Right | 55 00 00 04 59 | Right |
| Navigation | OK | 55 00 00 05 5A | OK(confirm) |
| Source Info | Display | 55 00 18 00 6D | display source information |
| Audio | Mute | 55 00 1A 00 6F | Mute |
| set up sleep mode | 15 minutes | 55 00 20 00 75 | |
| set up sleep mode | 30 minutes | 55 00 20 01 76 | |
| set up sleep mode | 45 minutes | 55 00 20 02 77 | |
| set up sleep mode | 60 minutes | 55 00 20 02 79 | |
| set up sleep mode | off | 55 00 20 03 78 | disable sleep mode |
| Sound Mode | Standard | 55 00 22 00 77 | |
| Sound Mode | Customize | 55 00 22 02 79 | |
| Sound Mode | Movie | 55 00 22 03 7A | |
| Picture mode | Standard | 55 00 28 00 7D | |
| Picture mode | Warm | 55 00 28 01 7E | |
| Picture mode | Vivid | 55 00 28 02 7F | |
| Picture mode | Customize | 55 00 28 03 80 | |
| Aspect ratio | 16:9 | 55 00 4C 00 A1 | |
| Aspect ratio | Point to Point | 55 00 4C 01 A2 | |
| Aspect ratio | 4:3 | 55 00 4C 02 A3 | |
| Volume | Up | 55 00 0C 00 61 | |
| Volume | Down | 55 00 0C 00 63 | |
| Set Volume (%) | 0% | 55 00 0F 00 64 | |
| Set Volume (%) | 20% | 55 00 0F 14 78 | |
| Set Volume (%) | 40% | 55 00 0F 28 8C | |
| Set Volume (%) | 60% | 55 00 0F 3C A0 | |
| Set Volume (%) | 80% | 55 00 0F 50 B4 | |
| Set Volume (%) | 100% | 55 00 0F 64 C8 | |
| Back | 55 00 0A 00 5F | ||
| Switch to input source | HDMI 1 | 55 00 80 08 DD | switch to HDMI input 1 |
| Switch to input source | HDMI 2 | 55 00 80 09 DE | switch to HDMI input 2 |
| Switch to input source | OPS | 55 00 80 0B E0 | switch to OPS |
| Set Backlight (%) | 0% | 55 00 89 00 DE | |
| Set Backlight (%) | 20% | 55 00 89 14 F2 | |
| Set Backlight (%) | 40% | 55 00 89 28 06 | |
| Set Backlight (%) | 60% | 55 00 89 3C 1A | |
| Set Backlight (%) | 80% | 55 00 89 50 2E | |
| Set Backlight (%) | 100% | 55 00 89 64 42 |
