https://cpldcpu.wordpress.com/2014/01/14/light_ws2812-library-v2-0-part-i-understanding-the-ws2812/ https://wp.josh.com/2014/05/13/ws2812-neopixels-are-not-so-finicky-once-you-get-to-know-them/
| bit | high |
|---|---|
| 0 | <500ns ^ 100ns> |
| 1 | >625ns ! <6000 |
The total time should be at least 1000ns at most 5000ns
The reset time should be >280 us (https://blog.particle.io/2017/05/11/heads-up-ws2812b-neopixels-are-about-to-change/)
Try to do things in between low boundaries