Well, I think I've well and truly had my idea of controlling this projector via RS232 kicked into touch.
I spent quite a bit of time playing around with different comm speed settings and just using a default gml to send garbage to the projector to get any kind of response but no joy.
I managed to get an email address from someone at Yamaha and have been writing to them (very politely) for the last 6 weeks and finally got a reply this morning. The wording was along the lines of "What are you trying to do? We only use RS232 to update the firmware"
I replied that I had seen a post on the Crestron newsgroup of someone who had successfully controlled an LPX500 via RS232, and included a link to their own webpage listing RS232 protocols for their other projectors.
I finally got a response back from them and quote it as follows:
"Due to certain agreements, we are not allowed to release the RS-232
protocol set for the LPX-500. However, if your unit was purchased here
in the US, it can be sent to us and we can update the system to accept
extended IR commands.
Extended codes can be found here:
http://www.yamaha.com/yec/customer/c...X500_IRxls.pdf
Regards,
XXXXX"
(name hidden out of courtesy)
That wording in the first line I found very odd, but it's not likely to be a subject they will comment on.
I have already tried to contact the person on the Crestron group to obtain a copy of the protocols but, after doing a search, I note that he has not posted on that group for well over a year so I don't hold much hope of hearing from him. I've also posted a question to the Crestron group generally to see if anyone else has these codes but no joy yet.
Because I did not buy the projector in the States, I'm not able to send the unit back to them, and even if I did, it seems a little excessive to have to send the unit to them just to update the firmware in this way.
Anyway, I'm now assuming that I cannot control this unit via RS232 (unless someone on this forum knows otherwise) but I'm curious to know what these "extended IR" commands are - not that it matters because the tone of that email suggests that to use them I'd still have to send the unit into them to enable those functions, but I'm just curious.
Thanks anyway
Ross