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DaisyLink / MultiColour LED Module


#1

Hey guys,

I did some googling for this answer first, so forgive me if it has been covered many times and I just have not been able to find it, but:

How many devices can you have on the daisylink bus? ie. how many multicolourled modules can I chain together?

I added a whole bunch in the Visual Studio designer to see if I would eventually get an error from the software but it let me add about a dozen without any problems. Perhaps I did not hit the max?

I guess the other, related question is, does the visual studio designer enforce all the limits / restrictions of the hardware? ie. would it let me add so many modules (f.ex as above with the leds) that the actual project wouldn’t work when constructed?

Thank you!


#2

This was never in the specifications. The multicolor led module 1.1 worked with up to 8 modules. Then this was enhanced in version 1.2 where we tested 20 and it worked just fine. I think a lot more will still work but then you are overloading the power.

So the answer is, theoretically speaking, it is unlimited. In reality, the limit is a factor of what module is used and how good it is designed, but in general 10 should be just fine.


#3
  1. By design you should be able to add up to 126 per each socket. What is practical number, I guess that depends on the module itself.

  2. I am not sure there is a check like that. I haven’t seen that in code.


#4

Interesting, thanks again guys :slight_smile:


#5

Architect is right, there is a 7 bit address so the max theoretical limit is 126 (127?)


#6

Yes,it is 126. 127 (0x7F) is a special default address that every module responds to until it is assigned a new address from 1-126 range by the main board. Main board assigns addresses starting with 1 to the closest module in the chain on each socket. So the maximum theoretical number of modules is 126*(number of X and Y sockets).


#7

Again, great to know. Thanks for the clarification :slight_smile: