Optoma H56a 232

[Deleted User]

Hello, I'm Trying to control a H56a using the 232 port, the people from optoma said that the protocol is the same, but I'm not able to power on, if I switch it on manually every commands works fine except the power on.

Any idea.

thanks.

[Deleted User]

I just had the exact same problem with a projector.
Turned out the device I was working with needed to steal power
from the NI **only when it was turned off**. So, the
effect was that with a 3 wire cable (RX, TX, GND) everything
worked except the 'power on' command. When I used a 5 wire cable (added RTS and CTS) the power on command started working.

The other thing I've seen with projectors is a menu setting for
power saving or something similar, which if not set properly disables the control port.

Hope that helps.

[Deleted User]

Optoma 232

Hi, finailly I found a way to control it.

To power on set thge baud to 9600 and send "'OKOKOKOKOK',10,13"

The rest of the commands at 57600.

And now it's working.

Chip Moody

Re: Optoma 232

Originally posted by Manolo
To power on set thge baud to 9600 and send "'OKOKOKOKOK',10,13"

Good thing you're not programming on that C

---

platform, eh? (No baud rate change after compilation)

- Chip

[Deleted User]

What do you mean?
If before send the power on command I set the baudrate to 9600 it's works perefect and after that I setup the baudrate to 57600.