Does RS-232 send commands with DC voltage?
So I am in a bit of a bind to get a Crestron system that was programmed to control a Sony VPL-HFZ64 to now control a VPL-FHZ131 to replace it. I have contacted Sony and a local vendor we use to verify that it will work with the "old" serial codes. Out of the box it doesn't as the FHZ131 has a Serial port that runs too fast. They are the same commands verified by Sony but the original projector was at 9600 baud and the new one is not.
The FHZ131 will take the rs232 commands via the HDBT port as well as video if setup for commands that way. So I did try the HDBT port with a Extron in1608ix to inject the rs232 into it. I got the video to show up but no control. I tried swapping the Rx/Tx lines into it. I check the Extron rs232 injection setting and still nothing.
So my guess there is some other commands attached to the original Crestron programming is not allowing this to work or the new projector is not responding/polling back right to the controller.
So I am getting desperate so I was looking to see if anyone knows if that RS-232 signals produce enough voltage that I might be able to have a Extron IPCP box with a Flex or Digitial IO ports to look/detect for a signal being generated from the Crestron commands via rs232 for the Sony to turn on/off. Then use that to trigger a macro on the Extron controller to send a on/off command directly to the Sony Projector.
Please let me know if I am crazy or if there is something else I can try. Thank you all.