I don't understand how setting channels project DMX512-RGBW

[JCAK]

Hello, I'm sorry for my stupid question, but I don't understand how setting channels using the DMX512-RGBWLED.

I have two circuit boards and both take the same configuration, channels 1 to 4. How can I do for take channels 1 to 8?

Could some one help me please?

thank you

[Martin3182]

Hey,

if i understood the information correctly, one DMX512-RGBWLED should take 4 Channels.

So you could set your first Device to 1-4 and your second to 5-8.

How you can set the Address you can read on http://pcdimmer.de/index.php/dmx512-har ... 512-rgbled

Best Regards, Martin

[JCAK]

Yes Martin, I read this but I don't understand. I'm using a language translator because I don't speak deutsche and may be the translation is not all good.

I push the switch and I hold it for about 3 seconds, my first circuit board take channels 1 to 4, then I do the same with my second circuit board but takes the same channels.

I'm sorry but I dont understand what I'm doing wrong.

Could some one tell me what i'm doing wrong?

Thank you very much!!

[Martin3182]

Hey,

you have to set the Start Address via the DMX Channels 511 and 512.


For Address 1 you set DMX Channel 511 to 0 and 512 to 0.
Then you hold the button on your first device.
After that you have to reset Channels 511 and 512.
For Address 5 you set DMX Channel 511 to 4 and 512 to 0.
Then you hold the button on your second device.

Hope this helped, Martin

[JCAK]

Thank you Martin, I think I understand

You mean 4 is the 511 channel level?
I have 255 levels, how I do if I want set the address 460?
What happen when I need set the receiver like channel 512?

[Martin3182]

Hey,

DMX Addresses are binary encoded, typically they are set by dip switches.
One DMX Channel can take 256 Values which can be represented by 8 bits (00000000 = 0; 11111111 = 255)
But you need to set 9 Bits to get an address range from 0 to 511.

So you take DMX Channel 511 as Bit 2 - 9 and the DMX Channel 512 represents the first bit, so it only matters if it is 0 or larger than zero.

When you want Address 460 you should first see which bits you should set.

460dec = 111001100
Where the Bits 2 to 9 are represented by the Channel 511 and the first bit is Channel 512.
So you have to set 512 to any value that equals 1 or larger.
DMX Channel 511 you have to set to the Decimal Value of the bits 2 - 9, in this case 204 (= 11001100),

regarding your second question, if you try to get the device running from 512 on, i have to tell you that this isnt possible.
The Address alway specifies the first Channel for the Device to listen on, so the Address of a device must be smaller or equal 512 channels - the number of channels the fixture takes + 1, so in this case the largest possible start address can be 509
then the Channels are
509 - R
510 - G
511 - B
512 - W

Hope i could help you.

Best regards, Martin

[JCAK]

THANK YOU VERY MUCH Martin
I understood the concept now.
I appreciate a lot your help.

Just one more doubt.

Is there any way to use any other address instead 511/512?
I ask you this because some transmitters have only 128 channels or less.
CurrentDmxByte==511
CurrentDmxByte==512
Changing these lines is all that I need to do for change the channels?

Kind regards

Julio

[Martin3182]

hey,

Yes you just need to change those two lines afaik.

Have Fun,
Martin

[JCAK]

Hi Martin

A lot of time from my last question. I'm very happy with your project and thanks to him I could do some things.
Now I try to do something with your code but I'm not realy sure how.
For example, actually when I set a start address 4 the reception start address begin in 5. What line of code would be changed for when I send a start address 4 realy will set 4 instead of 5?

Could you help me please?

Thank you very much

Kind regards

Julio