![](/images/new-backgrounds/1215263/215263135x1.webp)
RS-232C Communication
9 8 7 6
5 4 3 2 1
CONTROL port of the projector
1 | 2 | 3 | 4 | 5 |
6 | 7 | 8 |
| 9 |
|
| of the computer |
- (1) | (1) | CD |
RD (2) | (2) | RD |
TD (3) | (3) TD | |
- (4) | (4) | DTR |
GND (5) | (5) GND | |
- (6) | (6) | DSR |
RTS (7) | (7) | RTS |
CTS (8) | (8) | DTS |
- (9) | (9) | RI |
Connecting the cable
1. Turn off the projector and the computer.
Connect the CONTROL port of the projector with a
2. computer by a
Turn the computer on, and after the computer has started up turn the
3. projector on.
Communications setting
19200bps, 8N1
1. Protocol
Consist of header (7 bytes) + command data (6 bytes).
2. Header
BE + EF + 03 + 06 + 00 + CRC_low + CRC_high
CRC_low : Lower byte of CRC fl ag for command data
CRC_high : Upper byte of CRC fl ag for command data
3.Command data
Command data chart
byte_0 | byte_1 | byte_2 | byte_3 |
| byte_4 | byte_5 |
| |||
Action |
|
| Type |
| Setting code |
| ||||
low | high |
| low | high |
| low |
| high |
| |
Action (byte_0 - 1) |
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
| ||||
Action | Classifi cation |
|
| Content |
|
| ||||
1 | SET |
| Change setting to desired value. |
| ||||||
2 | GET |
| Read projector internal setup value. |
| ||||||
4 | INCREMENT |
| Increment setup value by 1. |
|
| |||||
5 | DECREMENT | Decrement setup value by 1. |
|
| ||||||
6 | EXECUTE |
| Run a command. |
|
|
6