DMX is a lighting control signal sent using EIA485 levels at 250 kbps.
A packet consists of:

        1.  Break
        2.  Mark after break
        3.  Start Code (0x00 for most lighting devices)
        4.  Up to 512 bytes where each byte is a lighting level (0x00 to 0xff)

        Each byte is sent as:

        start bit
        8 data bits
        2 stop bits

Harold



On Tue, 31 Aug 1999 11:56:39 +0100 Nigel Orr <nigel.orr@NCL.AC.UK>
writes:
> At 22:21 30/08/99 -0700, you wrote:
> >"LIGHTNING" control--as in  thunder and lightening?
>
> No, lighting, as in stage lighting ;-)
>
> >Would appreciate a little more information on DMX.  Sounds
> Interesting.
>
> Not much to it, just a string of data sending channel numbers and
> dimming
> levels.  As it doesn't control lightning, I guess it doesn't sound
> so
> interesting any more  ;-P
>
> Nigel

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