My JVC is fairly old so it uses this 3-step sequence for all commands. =12.0ptFirst I hit connect (192.168.1.33, port 20554) The projector responds with PJ_OK
=12.0ptThen I enter the command “PJREQ” to which the projector responds “PJACK”
=12.0ptAt this time, within 5 seconds, I can send a hex command or in fact any number of hex commadns as long as i don't delay more than 5 seconds between commands. For example, the “ON” command is “21 89 01 50 57 31 0A” and the projector turns on. It will continue to listen for 5 seconds past any command and then it closes the connection. To issue another command after that, you must go back to the beginning and open the communication again. I don't know if the newer JVC projectors act this way.
There is a program called Hercules which you can use to pre-enter these commands and test it out. Works great. look up hw-group.com
Oh, and thank you Dave!
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