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 | 19200 |
| Data Bits | 8 |
| Stop Bits | 1 |
| Parity | None |
RS232 Command List
| Function | Mode | Code | Remark |
| Power | Off | 69 71 25 | |
| Menu | 69 73 23 | ||
| Source switch | 69 75 21 | ||
| Source | HDMI 1 | 69 7F 17 | Introduced in firmware v5.0.3 |
| HDMI 2 | 69 80 16 | Introduced in firmware v5.0.3 | |
| OPS | 69 81 15 | Introduced in firmware v5.0.3 | |
| Volume | Up | 69 79 1D | |
| Down | 69 7A 1C | ||
| Volume level | 0 ~ 25 | 74 xx yy | xx: volume value from 0 to 25 (i.e. 0x00 ~ 0x19) yy: checksum so that xx + yy = 0x8A |
| Volume level | 26 ~ 100 | 75 xx yy | xx: volume value from 26 to 100 (i.e. 0x1A ~ 0x64) yy: checksum so that xx + yy = 0x8A |
| Mute/ Unmute | 69 85 11 | ||
| Backlight | On | 78 65 22 | |
| Backlight | Off | 78 64 23 |
