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Controlling multiple WS2812B via UNO

bassslapme

So I have been asked to install a bunch of LED's into a friends fight stick as he knows nothing about them whilst I have a little experience with them. I have used WS2812B's as a backlight for my TV and used a HM-10 for it so i could make an app for it.

I wanted to reuse the app I made as it would mean cutting down the coding process, but I can't get my head around how I would control multiple sets of the strips. I would daisy chain each strip together via the DIN and DO, but when I put this in practice it just lights up the whole strip with whatever I set the first strip to. I believe maybe defining the individual strips would work ( # define LED_STRIP_A)

and then defining how many led are in that strips and applying the code for the different effects or just the RBG value for each pixel would work but I would like some pre-mental breakdown advice before I plunge into this and fail.

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  • I've not yet used WS2812 on the Arduino but have built quite a few circuits using the Microchip PIC range. So, although I'm not familiar with any of the WS2812 Arduino libraries this is wha I'd have done in the PIC C code.....

     

    When you daisychain the strips together, is your code not pushing out just enough data to light the first strip ? Perhaps then, when it wants to refresh that strip it pushes that data further on out through Dout and into Din - and so illuminates the second strip (as you are seeing) ?

     

    You could: Set up an array to hold the RGB data and ensure it is long enough to hold data for all the elements you require daisychained. To do something specific to the nth strip you would manipulate the array contents directly. Then at regular intervals (say 50ms)  - push the whole array out on a single Arduino pin to the daisychained WS2812.

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  • I've not yet used WS2812 on the Arduino but have built quite a few circuits using the Microchip PIC range. So, although I'm not familiar with any of the WS2812 Arduino libraries this is wha I'd have done in the PIC C code.....

     

    When you daisychain the strips together, is your code not pushing out just enough data to light the first strip ? Perhaps then, when it wants to refresh that strip it pushes that data further on out through Dout and into Din - and so illuminates the second strip (as you are seeing) ?

     

    You could: Set up an array to hold the RGB data and ensure it is long enough to hold data for all the elements you require daisychained. To do something specific to the nth strip you would manipulate the array contents directly. Then at regular intervals (say 50ms)  - push the whole array out on a single Arduino pin to the daisychained WS2812.

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