LED strip DMX fixture - how to address individual LEDs

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MR-HH-GER
Posts: 2
Joined: Fri Apr 04, 2025 9:19 am

LED strip DMX fixture - how to address individual LEDs

Post by MR-HH-GER »

Hi,

I have a self built dmx fixture that I want to be controlled by a Wolfmix W1. This fixture is a LED strip with 13 RGB LEDs and each RGB LED is represented with 3 DMX channels (1x R, 1x G, 1x B). So in total that is a fixture with 39 channels.

When I use the Wolfmix W1 I would like to treat the whole RGB strip as a fixture with the following channel mapping:

Code: Select all

channel 1: R (first LED)
channel 2: G (first LED)
channel 3: B (first LED)

channel 4: R (second LED)
channel 5: G (second LED)
channel 6: B (second LED)

.
.
.

channel 37: R (13th LED)
channel 38: G (13th LED)
channel 39: B (13th LED)

However, setting up a fixture like that in the Wolfmix W1 results only in the first LED to be controllable. All remaining LEDs go into some random color that do not represent what is set in the Wolfmix W1.

With some experiments I found that when I treat each LED as its own fixture with 3 channels, I was able to correctly controll all LEDs.

Is this intended behaviour? Or is there a way to setup my LED strip as a single fixture with 13 RGB sets = 39 channels?

Thanks for any help on this.
MR-HH-GER
Posts: 2
Joined: Fri Apr 04, 2025 9:19 am

Re: LED strip DMX fixture - how to address individual LEDs

Post by MR-HH-GER »

In case that helps in this discussion:

I found that my problem described above may be connected with DMX protocol timings. Another person with a self-built fixture and same µC-firmware experienced a similar problem when using low latency DMX gear ([url]see here for details[https://github.com/MoonModules/WLED-MM/issues/153]).

Is it possible to show some DMX timings that are used by Wolfmix W1? Especially the lengths in msecs for these parameters:
  • Break
    Mark-After-Break
    Post-Start
    Interbyte
    Interpacket
Thanks for help.
axell
Posts: 475
Joined: Sat Feb 12, 2022 8:52 am

Re: LED strip DMX fixture - how to address individual LEDs

Post by axell »

What you want to do is exactly why there is the "beams" option, to separate the multi (13) RGB segments from each other and use the Wolfmix control whether to use individually LEDs are "all-in-one" set.

1. step: before create your profile with channels, make it aware of "beams" usage and assign the amount of "beams" you want to use - obviously 13
(using WEB Profile Builder this is in the Properties page - in the Beams tab
2. step: inContent page, select "Template" and only create 3 channels: R G B
3. now switch to unnamed Mode and ADD CHANNELS
4. in upper right corner set REPEAT to 13
5. now in Beams select INCREMENTAL (Start from beam 1)
6. Add

done. You automatically created a profile with 13x RGB ( = 39 channels).
Now use Wolfmix static Color to vary between ALL LEDs ONE Color (set Mode to SINGLE) or "many" different Colors (set Mode to "Alternate"" or other). Same at ColorFX: PHASE = 0% - all LEDs change to same Colors / PHASE 100% - LEDs will have different Color changes between 13 LEDs.
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