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  1. One more quick tip. If you do use an...

    One more quick tip. If you do use an oscilloscope, the trick to making it work for this use is the "hold off time", and make sure triggering (on rising edge) is "normal" rather than "auto".

    Set...
  2. For every byte you send, hardware serial...

    For every byte you send, hardware serial transmits a start and a stop bit. Every 8 bit byte you transmit becomes 10 actual bit times transmitted, where 2 of the bits are fixed. That's simply how...
  3. Please try to read this page again. It has the...

    Please try to read this page again. It has the answers to all those questions.

    https://www.pjrc.com/non-blocking-ws2812-led-library/

    Especially this:
  4. You should try to modify the WS2812Serial...

    You should try to modify the WS2812Serial library, rather than go down this deep rabbit hole of using the PWM hardware with DMA!

    https://github.com/PaulStoffregen/WS2812Serial

    Here is a blog...
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