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Thread: PropController - sACN (E1.31) to DMX Node

  1. #11
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    Default Re: PropController - sACN (E1.31) to DMX Node

    so your looking at a prop based ecg-dr4? it does the same thing along with renard and hyper dmx.
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  2. #12
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    Default Re: PropController - sACN (E1.31) to DMX Node

    Quote Originally Posted by pmscientist View Post
    Ahh, that's what I get for not reading the data sheet. I suppose you could use an SPI or I2C to MCU bridge, but that adds a couple bucks to the component cost, and the code probably gets a bit more complex too.
    There are three ways to overcome this "problem":

    1. Make strategic design choices and compromises
    2. Sacrifice I/O pins to gain functionality of WIZ830MJ (would require a rework of the board)
    3. Create an an alternative Ethernet interface that uses the WizNet pinout

    Right now option one is the right choice, however in the future if there is need I would suggest option three. The third option would require someone to design an ethernet module that is pin compatible (or at least the pins I'm using) to the Wiznet but offers additional functionality that the Wiznet lacks. I suspect this wouldn't be that hard to do with a modern PIC processor which could be teamed up wit a PCB that matches the WizNet footprint.
    DMX, RDM, ArtNet, sACN, and RDMnet...the future of DIY Christmas.
    Designer of the PropController an open source single-board hardware platform designed for lighting and prop control.

  3. #13
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    Default Re: PropController - sACN (E1.31) to DMX Node

    Quote Originally Posted by steve_hirst View Post
    so your looking at a prop based ecg-dr4? it does the same thing along with renard and hyper dmx.
    I have some untested Renard code but nothing for hyperDMX. Is hyperDMX a published protocol?
    DMX, RDM, ArtNet, sACN, and RDMnet...the future of DIY Christmas.
    Designer of the PropController an open source single-board hardware platform designed for lighting and prop control.

  4. #14
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    Default Re: PropController - sACN (E1.31) to DMX Node

    There's documentation somewhere over at AusChristmasLighting.
    As for the Renard code, I'll be able to put it through it's paces when my board comes.
    Check out what the [URL="http://www.extremelightingproducts.com/shop"]Extreme Lighting Products Shop[/URL] is selling!

  5. #15
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    Default Re: PropController - sACN (E1.31) to DMX Node

    I just finished laying out a board for an 8-universe E1.31 bridge using the WIZ830. It takes 16 I/O pins for the 830. With 4 taken up by the prog port and eeprom, and 3 more for a pushbutton and a couple of LEDs, I have 9 left over. 8 of those will be DMX outputs. This will be a one-way only board, E1.31 in, DMX, HYPERDMX, or PIXELNET out.

    The big unknown is how much tweaking will have to be done to the 812 drivers to work with the 830. It may very well turn out to be more trouble than it's worth. I haven't compared the data sheets enough to know how much they differ.

    I don't think it's feasible to try to get 8 universes out of an 812 in spi mode. IIRC, it takes just under 4ms to acquire an E1.31 packet using SPI mode of the WIZ. at 44 hz, 6 universes would be the theoretical limit. And with raw mode you have to receive and examine every udp packet that comes down the network.

    An 812 using indirect mode might be fast enough to use raw mode to do more than 4 universes. I still have my original bridge board that is laid out for the indirect interface. I don't remember how long it took to process each packet, but I know it was quite a bit faster than the SPI version.

    The other issue is, to do 8 universes of DMX, one cog would have to be able to handle 2 universes. Probably do-able at 250kbps. Or maybe limit it to 7 universes of DMX, or 2 of hyper-dmx, or 1 of pixelnet.
    The Sandevices E680/E681/E682 Pixel Controllers, part of the[SIZE=3] [COLOR=red]P[/COLOR][COLOR=orange]I[/COLOR][COLOR=blue]X[/COLOR][COLOR=lime]E[/COLOR][COLOR=magenta]L[/COLOR] [COLOR=red]P[/COLOR][COLOR=lime]R[/COLOR][COLOR=blue]O[/COLOR][COLOR=red]J[/COLOR][COLOR=magenta]E[/COLOR][COLOR=cyan]C[/COLOR][COLOR=red]T[/COLOR]
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  6. #16
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    Default Re: PropController - sACN (E1.31) to DMX Node

    2 and 4 DMX outputs per ethernet node is a fairly common configuration in the lighting world. It's a rare case that you need 8 universes of DMX all in one location and in those situations it's often easier to just place two nodes there.

    If 8 outputs are required then it will be a pretty dramatic change in design and concept. Which could include switching to a different micro, using multiple micros, or being really creative with the code (IE two DMX outs per cog). Is 8 something I should be considering for future or is 4 good for now?
    DMX, RDM, ArtNet, sACN, and RDMnet...the future of DIY Christmas.
    Designer of the PropController an open source single-board hardware platform designed for lighting and prop control.

  7. #17
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    Default Re: PropController - sACN (E1.31) to DMX Node

    I think I agree with you. 8 DMX outputs is a lot. My main reason for doing this is to get a chance to play with the 830. Strictly looking at it as a protocol converter, having 8 available universes would let you do 2 hyper-dmx outputs (2k chans ea I think) or 1 pixelnet output (4k channels).
    The Sandevices E680/E681/E682 Pixel Controllers, part of the[SIZE=3] [COLOR=red]P[/COLOR][COLOR=orange]I[/COLOR][COLOR=blue]X[/COLOR][COLOR=lime]E[/COLOR][COLOR=magenta]L[/COLOR] [COLOR=red]P[/COLOR][COLOR=lime]R[/COLOR][COLOR=blue]O[/COLOR][COLOR=red]J[/COLOR][COLOR=magenta]E[/COLOR][COLOR=cyan]C[/COLOR][COLOR=red]T[/COLOR]
    [URL="http://www.sandevices.com"]www.sandevices.com[/URL][/SIZE] <-email jim at

  8. #18
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    Default Re: PropController - sACN (E1.31) to DMX Node

    For clarity for others reading this thread, the PropController can have as many DMX outputs as you want. The limitation is the number of sockets available which is 4. So you could have 8 DMX outputs but you would only be able to source 4 universes of data which would mean that 1/2 of the outputs would output duplicate data, sort of like a DMX splitter.
    DMX, RDM, ArtNet, sACN, and RDMnet...the future of DIY Christmas.
    Designer of the PropController an open source single-board hardware platform designed for lighting and prop control.

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