artnet

thats a massive help and clarifies loads of issues.
i'll get back to you about the artnet box if i need to buy one...
thanks
mark

On 6 Jun 2007, at 23:35, Joost Rekveld wrote:

> Hi,
>
> a couple of years ago i tried using an artnet to dmx box in order
> to control multiple led light fixtures ( i needed someting like 600
> dmx channels and artistic license had one box with two dms
> universes out).
> The whole of Artnet can do more than just dmx over ethernet, but if
> you are interested in only the dmx part their protocol is really
> simple: it is basically a list of all the dmx data plus an artnet
> header.
>
> If you use aka.datagram to format your data you can use udpsend
> (read the CNMAT compatibility thingie in the helpfile) to send them
> to your artnet box. No need for new externals.
> For receiving you'd need to decode packets received by udpreceive,
> don't remember now whether aka.datagram can do that too.
>
> Below the abstraction I made at the time to send dmx values to an
> artnet box, I made it a couple of years ago, you should replace
> ot.udp by udpsend since times have changed and perhaps change the
> patch a bit accordingly.
>
> For the project I was working on at the time (see: http://
> www.lumen.nu/rekveld/wp/?p=121 ) I ended up buying two lanboxes
> under pressure of a deadline, and later it turned out that the
> artnet box I had was a faulty one. (They repaired it and I've never
> used it since, want to buy one ? it's a Net-Lynx O/P, i'll take any
> reasonable offer....)
> The lanboxes are great, by the way, they use a similar (but
> slightly more clever) dmx over ethernet protocol if you only want a
> ethernet-to-dmx converter, and the boxes can do much more. (You
> could even program them in forth and make them standalone
> controllers...) And they now come with max objects. They do not
> receive dmx, however.
>
>
> hope this helps,
>
>
> Joost.
>
>
>
>
> On Jun 6, 2007, at 11:06 , mark@markfell.com wrote:
>
>> my understanding is that the advantage of artnet over OSC is that
>> there are hardware units that can convert from artnet to dmx and
>> also increasingly many fixtures now come with artnet onboard. if i
>> was using OSC i would have to have a computer receiving it, and
>> then some from of dmx unit attached to the computer. but im not an
>> expert in lighting systems so if you know otherwise please let me
>> know.
>> m
>>
>
>
> max v2;
> #N vpatcher 243 254 1086 859;
> #P origin -5 0;
> #N comlet write return (ints);
> #P outlet 292 542 15 0;
> #P window setfont "Sans Serif" 9.;
> #P newex 233 510 69 196617 aka.datagram;
> #N comlet write return (symbol);
> #P outlet 233 542 15 0;
> #P newex 184 321 27 196617 / 2.;
> #P newex 184 368 27 196617 << 1;
> #P newex 184 344 24 196617 ceil;
> #P message 184 392 51 196617 length $1;
> #P newex 184 298 30 196617 + 18;
> #P newex 579 439 65 196617 prepend host;
> #P newex 14 79 29 196617 t b b;
> #P message 511 392 45 196617 offset 0;
> #P newex 242 349 27 196617 t l b;
> #P newex 242 325 75 196617 pack 0 0 0;
> #P message 650 439 85 196617 tellmeeverything;
> #N comlet write return (ints);
> #P outlet 73 533 15 0;
> #P newex 14 501 69 196617 aka.datagram;
> #P newex 14 54 55 196617 route bang;
> #P newex 14 476 165 196617 otudp write 10.255.255.255 6454;
> #P newex 14 441 69 196617 aka.datagram;
> #P newex 532 65 89 196617 t b b b;
> #P message 532 87 33 196617 reset;
> #P newex 274 297 38 196617 & 255;
> #P newex 242 297 27 196617 >> 8;
> #P newex 301 191 27 196617 0;
> #P newex 99 369 30 196617 + 18;
> #P newex 242 260 27 196617 int;
> #P newex 121 259 27 196617 int;
> #P newex 121 230 52 196617 maximum;
> #P newex 121 196 44 196617 +;
> #P newex 121 172 33 196617 zl len;
> #P newex 60 135 49 196617 buddy;
> #P newex 59 108 50 196617 zl slice 1;
> #P message 99 393 51 196617 offset $1;
> #P newex 532 43 45 196617 loadbang;
> #P newex 610 123 35 196617 int $2;
> #P newex 571 123 35 196617 int $1;
> #P newex 375 161 27 196617 t b i;
> #P newex 338 191 64 196617 &;
> #P newex 338 161 27 196617 << 8;
> #P message 242 392 264 196617 65 114 116 45 78 101 116 0 80 0 0 14
> 0 0 0 $3 $1 $2;
> #N comlet write return (symbol);
> #P outlet 14 533 15 0;
> #P newex 264 124 269 196617 route clear reset subnet universe ip
> channels tellmeotudp;
> #N comlet clear , reset , subnet , universe , ip , channels ,
> tellmeotudp;
> #P inlet 264 29 15 0;
> #N comlet bang(stuurt dmx) , list(offset , data1 data2..);
> #P inlet 14 30 15 0;
> #P comment 337 339 199 196617 Art-Net0 (8) opcode (2inv) revisionnr
> (2) seq(1) phys(1) universe(2) length(2);
> #P comment 423 296 100 196617 opcode niet inv;
> #P connect 2 0 29 0;
> #P connect 29 0 36 0;
> #P fasten 15 0 27 0 65 419 19 419;
> #P fasten 39 0 27 0 189 427 19 427;
> #P connect 36 0 27 0;
> #P fasten 35 0 27 0 516 435 19 435;
> #P fasten 6 0 27 0 247 431 19 431;
> #P fasten 13 0 27 0 104 423 19 423;
> #P connect 27 0 28 0;
> #P fasten 37 0 28 0 584 464 19 464;
> #P fasten 32 0 28 0 655 469 19 469;
> #P connect 28 0 30 0;
> #P connect 30 0 5 0;
> #P connect 29 1 14 0;
> #P connect 14 1 15 0;
> #P connect 30 1 31 0;
> #P connect 14 0 15 1;
> #P connect 15 1 21 0;
> #P connect 21 0 13 0;
> #P fasten 15 0 16 0 65 163 126 163;
> #P connect 16 0 17 0;
> #P connect 17 0 18 0;
> #P connect 18 0 19 0;
> #P fasten 15 1 17 1 104 158 160 158;
> #P fasten 22 0 18 1 306 215 168 215;
> #P fasten 19 0 18 1 126 282 178 282 178 221 168 221;
> #P fasten 20 0 38 0 247 288 189 288;
> #P connect 38 0 42 0;
> #P connect 42 0 40 0;
> #P connect 40 0 41 0;
> #P connect 41 0 39 0;
> #P connect 27 0 44 0;
> #P connect 44 0 43 0;
> #P fasten 36 1 20 0 38 102 247 102;
> #P connect 20 0 23 0;
> #P connect 23 0 33 0;
> #P connect 33 0 34 0;
> #P connect 34 0 6 0;
> #P fasten 18 0 20 1 126 253 264 253;
> #P connect 3 0 4 0;
> #P fasten 25 0 4 0 537 114 269 114;
> #P fasten 20 0 24 0 247 288 279 288;
> #P connect 24 0 33 1;
> #P connect 44 1 45 0;
> #P connect 4 1 22 0;
> #P fasten 8 0 33 2 343 319 311 319;
> #P fasten 4 5 22 1 454 155 323 155;
> #P connect 4 2 7 0;
> #P fasten 10 0 7 0 576 149 343 149;
> #P fasten 9 0 8 0 380 185 343 185;
> #P connect 7 0 8 0;
> #P connect 4 3 9 0;
> #P connect 9 1 8 1;
> #P fasten 11 0 8 1 615 184 397 184;
> #P fasten 34 1 35 0 264 382 516 382;
> #P connect 12 0 26 0;
> #P connect 26 0 25 0;
> #P connect 26 1 10 0;
> #P fasten 4 4 37 0 417 199 584 199;
> #P connect 26 2 11 0;
> #P fasten 4 6 32 0 491 164 655 164;
> #P pop;
>

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