5 ms·

I love my ESP32-S series. I use them in tons of LED projects[1]. Sadly it seems WS2812b are fundamentally incompatible, under FreeRTOS, with wifi due to timing

I love my ESP32-S series. I use them in tons of LED projects[1]. Sadly it seems WS2812b are fundamentally incompatible, under FreeRTOS, with wifi due to timing glitches from interrupts. In my next two project I'm going to have to run two 30ft cables because I can figure out how to get low latency wifi to work on a Raspberry Pi 2040 (where PIO is fabulous, but 500ms request latency is killing me) or without glitches on a ESP32. [1] https://anima.haus/events/seacompression https://anima.haus/events/seacompression

leptons 3y ago
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 3y ago
  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 https://lib.rs/crates/ws2812-esp32-rmt-driver
  - leptons 3y ago
    RMT glitches when wifi is accessed. I started with RMT, it was a big fail for me.