Comments: SparkFun ESP32 DMX to LED Shield

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  • I'm new to DMX. Trying to get this shield to connect to a series of DMX PAR lights I got online that had decent reviews.

    The 3-pin XLR cables have a female and a male connector on each end. The DMX-IN port on each light takes a female cable connector. The DMX-OUT port from the Sparkfun board also takes a female connector. Is something backward or should I pick up a female-to-female XLR adapter?

    I've tried all the possible male/female port configurations and run the code that changes brightness from 0-255 but nothing happens. This seems like it would be a pretty common configuration.

    EDIT: got my hands on a 3-pin female-female adapter. So now the DMX-OUT from Sparkfun board goes into DMX-IN of the light. Still no go. The program sets all R/G/B and brightness channel values to 255. Nothing happens.

    Any tips appreciated.

    • LukeW / yesterday / 1

      The two connectors on the SparkFun board are directly connected to each other so it doesn't really matter which you use for input or output.

      Do you have another DMX controller that you can use to test the fixture?

      It is also possible that there is an address on the fixture that can't be above 00 or it will put it in a different mode, etc...or an address that has to be at a specific value? A link to the datasheet/manual for the fixture would be helpful.

      Lastly, eliminate as many connections as possible. Connect a single cable to a single fixture. Try terminating that fixture's output with a 120 ohm resistor.

      • We actually ended up solving this issue over on Github, updating Arduino and recompiling everything seemed to fix the issue if I remember correctly.

        • LukeW / yesterday / 1

          Cool! Thanks for the update. I received my board but an Easter production has kept me away from it. Hoping to play with it over the next few weeks.

  • LukeW / last month / 1

    "Typically, the female XLR connector on the slave is the input while the male is the output."

    Incorrect. DMX outputs use a female connector and inputs on a male. https://en.wikipedia.org/wiki/DMX512#Connectors

    • Totally correct, sometimes typos make it through, fixed now

      • LukeW / last month / 1

        Thanks! I'm excited about this product. Price/features and from a reputable source...should be a winner!


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