Hello all, let me explain what I'd like to do.
I have a device which controls a strip of 15 SK6812 RGBW LEDs. I would like to intercept the commands going to the LED strip and use it to control separate non-addressable LEDs. Using a WS2811 chip is not an option because it does not support RGBW commands (only RGB) and therefore the incoming data will cause unwanted behavior.
What I'd like to do is set up an arduino to act like a WS2812/SK6812 neopixel (the signal characteristics are here, courtesy of adafruit) and read the commands from the driving device. However I don't know where to start creating a program which reads commands with such short and seemingly crucial timing requirements. Can anyone point me in the right direction or maybe show me an example of a piece of code which receives a similar signal? Thank you!