Forums > MaxMSP

dmxusb external queries

September 22, 2006 | 6:55 am

Hi has anyone come across any problems with this object? Im trying to connect an Enttech open dmx interface the my PC running windows XP. Its running via a usb 1.1 port.

I get the following error when clicking the ‘open COM3′ message box in the dmxusb help file: ‘error: dmxusb: could not set params to control dcb of device’.

I have gone into the device manager in XP to change the com port to COM3 but its still not working.

Has anyone else come across this?

Thanks.


September 22, 2006 | 3:31 pm

i now get the message ‘unable to detect device’.


September 22, 2006 | 4:30 pm

hi kit!

i haven’t been working on a win-pc with the device yet, we problems
using it on a mac as well.
it probably is not the device. try using a shorter and/or high
quality usb-cable instead of the one shipped with the device!
this solved the problem in my case. if you still have problems try
contacting the developer: nullmedium.de
if you are using a laptop be sure the device gets enough power. it
needs about 300mA in peak.

greets, jens

Am 22.09.2006 um 17:31 schrieb Kit Webster:

>
> i now get the message ‘unable to detect device’.


September 22, 2006 | 4:38 pm

jens ewald wrote:

> hi kit!
>
> i haven’t been working on a win-pc with the device yet, we problems
> using it on a mac as well.

Hi Jens, you are using the DMX USB PRO interface, this guy is talking
about the Open version which is nothing else than a USB to RS485
converter without any processor inside.

> it probably is not the device. try using a shorter and/or high quality
> usb-cable instead of the one shipped with the device!
> this solved the problem in my case. if you still have problems try
> contacting the developer: nullmedium.de

He already did and is still writing to the list his encrypted short
messages in case I don’t reply to his emails within 30 minutes.

Olaf


September 22, 2006 | 10:38 pm

Hi…I just wanted to add myself to this list of questions…

Olaf, I just wondered if you had any hope of getting the Enttec OpenDMX widget working on OS X…

I’d e-mailed you a while ago and it sounded like you were still working on it, but I haven’t heard since.

I really appreciate your hard work (I’m using the widget under XP successfully now)…but I’d really love (and be willing to pay you like $60 if it worked in the next few weeks) for the ability to use it under OSX. I know I can buy the Pro version and your external for that, but it’s a lot of $$ when the cheaper one almost does what I want.

Please let me know if there’s any hope, I have a project coming up that I’d love to use a widget for, but it’s Mac only so I’m looking for other solutions.

Thanks again!

i@seanstevens.com


September 23, 2006 | 4:13 am

did you eventually get the dmxusb external to work on a mac?


September 23, 2006 | 8:41 am

Sean Stevens wrote:

> Hi…I just wanted to add myself to this list of questions…
>
> Olaf, I just wondered if you had any hope of getting the Enttec OpenDMX widget working on OS X…
>
> I’d e-mailed you a while ago and it sounded like you were still working on it, but I haven’t heard since.

I’m no longer working on it.

> I really appreciate your hard work (I’m using the widget under XP successfully now)…but I’d really love (and be willing to pay you like $60 if it worked in the next few weeks) for the ability to use it under OSX. I know I can buy the Pro version and your external for that, but it’s a lot of $$ when the cheaper one almost does what I want.

I stopped worrying about getting the Open going under OS X becasue I saw
how it was eating my CPU power. I have a home-made version of it that
should be the same as the one from Enttec and mine is working under OS
X, the Enttec is not (although I used their published schematic to build
mine). Due to all the trouble with the Open and people asking whether
they could use it to receive DMX (which won’t work) I dropped my
interface into the trashcan and stopped working on the Open’s software.
I think it’s really a bad idea to rely on the OS to pump out DMX data at
250kbps as a continous data stream where timing between bytes is used by
the receiver to identify channel numbers.

Olaf


September 24, 2006 | 1:07 pm

If anyone was wondering I eventually got the external to work. My computer wasnt recognising the interface as a VCP port. Thanks Olaf for creating this!


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