DotStar - Maximum controllable LED count?

[war4peace]

I have been searching on the forums and the Wiki, and there's no definitive answer.
The Duet 3 6HC says "LED strip support: RGB Neopixel (max. 60 LEDs) or DotStar"
The wording makes me think the 60 LED limitation only applies to NeoPixel, but not DotStar. Am I correct in my assumption?

[dc42]

@war4peace said in DotStar - Maximum controllable LED count?:

I have been searching on the forums and the Wiki, and there's no definitive answer.
The Duet 3 6HC says "LED strip support: RGB Neopixel (max. 60 LEDs) or DotStar"
The wording makes me think the 60 LED limitation only applies to NeoPixel, but not DotStar. Am I correct in my assumption?

You are correct. There is firmware limit for DotStar, but it is very high. A more serious limit is the power needed to drive a long LED strip.

The limit for Neopixel is increased to 80 in firmware 3.3.

[war4peace]

@dc42
The DotStar LEDs are going to be powered by external PSU.
Could you please define "very high"? Hundreds of LEDs? Thousands? I am trying to plan lighting for my 3D printer and ordering PSUs and LED strips accordingly. And yes, I plan on using thousands in the end

[dc42]

@war4peace I just checked the code again. The maximum number of DotStar LEDs in RRF 3.3 on Duet 3 MB6HC would be 61440.

[war4peace]

@dc42
Thank you very much, that definitely answers my question
One little thing, you might want to add that limit to the Wiki - maybe there's another strange guy like me who wants to know in the future

[dc42]

I have updated the wiki page.

[war4peace]

@dc42 Thank you very much