On the same Arduino 2 programs for two different pins

[alto777]

@david_2018 Using millis timing with multiple strips of leds is going to be somewhat inaccurate

Word. I wrote a workaround for that, see this thread for ideas:

Make millis() accurate regardless of code (or alternative to it)

I had the same problem and solved it by simply watching a free-running counter. It's a kludge I call fakeMilcros(), I never did figure out how to make it run as micros or millis, but I can say it is accurate and is not affected by interrupts. Good for neopixels… The approach is sound, I was just too lazy to link the fakeMilcros to any particular real time increment like a millisecond or microsecond as report and used in delay() and delayMicroseconds(). I offer it as a point of departure. I us…

I have used this and variations on it as necessary on other microprocessors, basically find a peripheral timer counter to spare and set it up as a free running counter and consult that for assessment of the passage of real time.

a7