Any successful RS232 Serial control of a projector via a Mac?

Discussion in 'Multimedia, Projection, and Show Control' started by Mark Neisser, Oct 14, 2015.

  1. Mark Neisser

    Mark Neisser Member

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    I have been bashing my head against the wall trying to control any of my 15 projectors via serial commands and my macbook pro.

    I am using a USB serial interface with CoolTerm and a cross over serial cable. I see the usb serial driver and looping back pin 2 & 3 shows the exact hex code that should work coming back from the pin. However it doesn't work to turn on the projector.

    Power on cmd is:
    0x06 0x14 0x00 0x04 0x00 0x34 0x11 0x00 0x00 0x5D
    but tech support said to run it as:
    06 14 00 04 00 34 11 00 00 5D

    Anyone doing this successfully on a Mac with any projector. View Sonic said they didn't have one to test it on!!!

    Help me Obewon Kanobee, you're my only hope!!!!

    Screen Shot 2015-10-14 at 9.37.25 AM.png Screen Shot 2015-10-14 at 9.38.29 AM.png
     
  2. Chris15

    Chris15 CBMod CB Mods Premium Member Departed Member

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  3. Mark Neisser

    Mark Neisser Member

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    Have you gotten it to work on a Mac?
     
  4. Mark Neisser

    Mark Neisser Member

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    My pin set up seems odd. There is NO GROUND (no tone on pin 5 from ANY PIN) that connects and my pin out set up seems strange.
    Null Modem.jpg
     
  5. Mark Neisser

    Mark Neisser Member

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    OK, so now I think the pin out may be correct, but the volt meter on 2 gives me nothing. Is the current sent all the time or only when data is sent?
     
  6. FMEng

    FMEng Well-Known Member Fight Leukemia

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    For troubleshooting RS232, there are two things I routinely do. First, get yourself a "null modem." It's an adapter with a DB9F and DB9M. All it does is swap pins 2 and 3, but it allows a quick test to see if the cable doesn't match the equipment. Radio Shack used to have them, but not sure now.
    http://www.cablewholesale.com/produ...o DB9 Female&gclid=COTZ9IydyMgCFU9ffgodFfcJOw

    Secondly, get a DB9F and wire pin 2 to pin 3 to make a loopback adapter. Turn local echo off on the terminal program. If the port is working, you will see what you type on the screen with the loopback plugged in, and it'll stop when you unplug it. That confirms whether the driver and port is working.

    Make sure The bits per second (baud rate), number of bits, parity, and number of stop bits match the projector. Turn OFF flow control (handshaking).
     
  7. Mark Neisser

    Mark Neisser Member

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    Great advice. I have done all those things and even see the data looping back correctly still no joy. I ordered a couple other cables with lights and other options hopefully this will solve it. Are you controlling a projector with a Mac?
     
  8. Chris15

    Chris15 CBMod CB Mods Premium Member Departed Member

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  9. ThomasL

    ThomasL Member

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    Don't have a Mac, but in my experience, the serial port is just a number, eg. 1, 2, 3...
    I see a weird Port name in your attachment pic. Perhaps that is why communication to the Projector is not going through.

    ThomasL
     
  10. vman

    vman Member

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  11. Joshualangman

    Joshualangman Active Member

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    [never mind; didn't realize it was you, Mark]
     
  12. vman

    vman Member

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