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Thread: Rdm dmx

  1. #1
    Junior Member fdu's Avatar
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    Rdm dmx

    Dear

    I search some sample with RDM .


    Thanks

  2. #2
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    This link might be useful? http://www.mathertel.de/Arduino/DMXSerial2.aspx

    For those not in the know, DMX512 is an RS485 based theatre lighting control bus, and RDM is the extensions for
    readback from devices on the bus (originally DMX512 was send-only)

  3. #3
    Junior Member fdu's Avatar
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    Quote Originally Posted by MarkT View Post
    This link might be useful? http://www.mathertel.de/Arduino/DMXSerial2.aspx

    For those not in the know, DMX512 is an RS485 based theatre lighting control bus, and RDM is the extensions for
    readback from devices on the bus (originally DMX512 was send-only)
    In Adruino version , there are no problem , i have library for this . I search in teensy version .

    thanks

  4. #4
    Senior Member PaulS's Avatar
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    TeensyDMX.

    Paul

  5. #5
    Junior Member fdu's Avatar
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    Quote Originally Posted by PaulS View Post
    TeensyDMX.

    Paul


    In the TEENSY DMX there are no RDM . I use it .

    thanks

  6. #6
    Senior Member PaulS's Avatar
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    Here is some info on RDM using TeensyDMX: https://forum.pjrc.com/threads/54660-Teensy-DMX-RDM
    Or perhaps this library? With this additional info.

    Paul

  7. #7
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    Itís possible to do complete implementations of RDM with TeensyDMX as well (by writing your own `Responder` implementation), but I havenít released any examples. I do that more in the commercial end of things. Thereís other free libraries out there that other people have mentioned; I just wanted to add that it is possible.

  8. #8
    I read somewhere (link lost in 1Gb bookmarks) that RDM is difficult if not impossible on the Teensy hardware due to the timing required to send RDM in the space/time after dmx512 main message. You need to receive and send on the same port, sending within the proper time slot of the protocol.
    That, and running out of time b4 jumping into a production gig, put a stop to my DMX explorations.

    Seeing the FlexIO announced under Teensyduino 1.54, i wonder if there are hooks now to do the proper magic.

    (Gig was installing led neon for vapid reality tv show. got to work with 24v leds, long runs etc. Paid well, but hard work under Hawaii sun.)

  9. #9
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    I have working RDM code, both controller and responder, on a Teensy (3 and 4).

    The Responder class (in TeensyDMX) takes care of setting the timings for you, if you look at that header. (But writing an RDM responder isnít trivial.)

    Iíd love to hear more about your Hawaii tasks sometime. (Feel free to msg me.)
    Last edited by shawn; 07-13-2021 at 09:45 PM.

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