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.
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."
