JohnHuntington Posted March 11, 2018 Report Share Posted March 11, 2018 There's a bunch of info on the forum, but it took me a while so I wrote up my notes on controlling a Panasonic projector using PJLink: http://controlgeek.net/blog/2018/3/11/controlling-the-shutter-on-a-panasonic-pt-dz21k2-projector-using-pjlink John 0 Quote Link to comment Share on other sites More sharing options...
Jonas Dannert Posted March 12, 2018 Report Share Posted March 12, 2018 Thanks for the info John, great work! /jonas 0 Quote Link to comment Share on other sites More sharing options...
Mike Fahl Posted March 12, 2018 Report Share Posted March 12, 2018 One tricky aspect with the PJLink protocol is that you may NOT send any command to the projector until after its initial handshake. If there's no password set, this is the "PJLINK 0" string received initially from the projector. There's no easy way to make WATCHOUT wait for this initial handshake before sending its command, which is probably why the first attempt after a disconnect sometimes fail and a second command may succeed (because by then the handshake has been sent by the projector). As a side note, PIXILAB's recently introduced control system named BLOCKS provides "intelligent" drivers for projectors and other devices. Our PJLink driver manages this initial handshake before it starts sending commands to the projector. This makes for a more robust implementation than just blindly banging out the commands. Mike 0 Quote Link to comment Share on other sites More sharing options...
cowboyclint Posted March 12, 2018 Report Share Posted March 12, 2018 I have used these PJLink for a long time and have always had to put in 2-3 cues into the aux timeline to send a command into in case the first one fails. For this show I am currently doing, we made an looping aux timeline that sends a carriage return every 20 seconds to all projectors. This has reduced our failed to send data message rate by easily 95%. 0 Quote Link to comment Share on other sites More sharing options...
Mike Fahl Posted March 13, 2018 Report Share Posted March 13, 2018 Your "trick", cowboyclint, likely avoids WATCHOUT closing the connection after a period of inactivity, thereby also avoiding any issues related to having to re-do the handshake. So it makes sense. Mike 0 Quote Link to comment Share on other sites More sharing options...
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