Thanks for your article on abusing spi for ws2812b! I'm trying to adapt what I learned from your article and perhaps you have time to comment. I'm using a Seeed Studio ESP32-C3 board at 5v to VUSB.

The controller that came with my led strip of ws2812bs still works fine to control the strip, so I haven't broken anything yet. But I'm not getting the lights working from my code (although basics like println() are working fine). I haven't gotten yours to compile yet - I think I'm using a different set of libraries and I'm pretty new to embedded development - but I'll probably revisit trying to get yours to build and run.

I've tried with or without the external 220Ω resistor and it doesn't seem to make a difference on the signal. Wowki doesn't have a capacitor (100uF) that I can show between my VCC and GND, nor the grounding of the WS2812b, but it's there.

https://github.com/JasonKleban/navlights/blob/49f5adadc44c9ecb2de9d67f810f5aba8e47aa66/src/main.rs#L66C1-L86C6

Every 5 seconds (that's my loop delay), I can capture this picture on the scope I barely know how to use:

I expect to see wider pin-high durations. These seem to be 1us pulses. Unless the scope is just showing me edges for some reason.

The LED strip controller looks different on the scope, but it does fast animations of the full strip, so I can't really compare.

Reference pinout. I'm using VUSB, GND and MOSI/GPIO10/D10

Not your problem, of course - just reaching out.