[leptons]

Been using ESP32 to drive WS2812b LEDs for years. You need to use the SPI peripheral to drive the LEDs, using a driver that outputs the data format the LEDs understand. The SPI peripheral uses DMA and does not glitch when wifi is accessed at the same time.

[bryal]

Another alternative is to use the RMT (remote control module). I've had success with that. There's a driver for it in Rust: https://lib.rs/crates/ws2812-esp32-rmt-driver

[leptons]

RMT glitches when wifi is accessed. I started with RMT, it was a big fail for me.