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Comment by StavrosK | Hacker News Reader

It has, yes (at least the ones I posted). I can definitely open source the code if there's interest, I didn't initially just because there's a password committed in the firmware. The BOM isn't interesting at all, it's just a WeMos D1 mini with a microSD shield, and the LED strip is connected to that and powered by two 18650 batteries in parallel.

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I'd love to see your code. In particular, I'd like to see what you did with "I could just directly assign the data I read from the SD card to the internal buffer of the LED library instance and display it."

Oh, that's just this:

    self._np.buf = column
    self._np.write()

Where column is a list of RGB (or RBG) pixel values like [128, 255, 0, 255, 0, 0, 128, 15, 200].

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