Is it possible to connect two ws2812b to Raspberry pi zerow?

  • Hi, I'm new and I hope I post this to the right section.


    I'm using a raspberry pi zero w with Hyperion.NG Alpha 9 with a ws2812b directly connected to it:


    This one works:
    LED Hardware 1:
    Type: ws281x
    RGB Byte order: GRB
    GPIO Number: 18
    DMA Channel: 5
    PWM Channel: 0


    My guess is, that I could add a second LED strip with the following settings:
    LED Hardware 2:
    Type: ws281x
    RGB Byte order: GRB
    GPIO Number: 13
    DMA Channel: 10
    PWM Channel: 1


    However, if I set it up like this, the first ledstrip starts to flicker and also the second.


    Is my thought for the second configuration somewhere wrong or can the raspberry not handle it? I assumed I can just use the second PWM channel and another DMA channel and it just works.

  • I suspect the Pi not being able to maintain a stable data signal (on your GPIO 13 and 18) when 2 ledstrips are connected.
    Sometimes it is already tricky to maintain only one...
    You may want to use a level shifter on both your GPIO to fix the problem.

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