Write DMX from Raspy serial with OLA as backend

[Benni Graf]

Hi everyone!

I'm doing some research and wanted to ask if anyone already did this: 

The Raspberry PI can write serial data over it's GPIOs, so it should be possible to output a dmx signal (using some converter to get rs485). Did someone build and document this? Is there a plugin/driver for OLA to support that?

(The Raspberry would make a cheap ArtNet node with this ;-), although I understand the circuits should be isolated and there would be problems with operating system interrupts...)

Side question: I'm looking for a relatively cheap Artnet node which supports multiple universes and can involve some DIY. I know of the Radig Artnet node, but are there other similar projects going on, preferably with multiple universes?

Thanks and best,

Benni.

[Simon Newton]

On Mon, Jul 14, 2014 at 8:10 AM, Benni Graf <benn...@gmail.com> wrote:
> Hi everyone!
>
> I'm doing some research and wanted to ask if anyone already did this:
>
> The Raspberry PI can write serial data over it's GPIOs, so it should be
> possible to output a dmx signal (using some converter to get rs485). Did
> someone build and document this? Is there a plugin/driver for OLA to support
> that?

Yes, it's the uartdmx plugin. Richard has a write up at

http://eastertrail.blogspot.co.uk/2014/04/command-and-control-ii.html

Simon

>
> (The Raspberry would make a cheap ArtNet node with this ;-), although I
> understand the circuits should be isolated and there would be problems with
> operating system interrupts...)
>
> Side question: I'm looking for a relatively cheap Artnet node which supports
> multiple universes and can involve some DIY. I know of the Radig Artnet
> node, but are there other similar projects going on, preferably with
> multiple universes?
>
> Thanks and best,
> Benni.
>

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[Santi]

> Side question: I'm looking for a relatively cheap Artnet node which
> supports multiple universes and can involve some DIY. I know of the
> Radig Artnet node, but are there other similar projects going on,
> preferably with multiple universes?

http://www.deskontrol.net/blog/arduino-based-dmx-artnet-node/

3 universes on Arduino Mega + ethershield + dmx shield

Cheers.

[Benni Graf]

Thanks Simon and Santi, just what I was looking for!

Best, Benni.