Hue Reference?

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1

Yes, I know this is a silly question but the Plasma2040 board example code mostly uses hue to define colors. I’ve been looking around in the GitHub repo and the tutorials but I can’t find a reference for how to use hue values.
Can anyone point me to a reference guide or something?

The NeoPixel Uber guide has a section on Hue: Arduino Library Use | Adafruit NeoPixel Überguide | Adafruit Learning System but it’s a HSV value which seems to be different than what Pimoroni uses in their libraries.

3

OK, I think I get it now. So here’s an example that shows the use of HSV, just assuming 1 for saturation and brightness.

while True:
    for i in range(NUM_LEDS):
        # the if statements below use a modulo operation to identify the even and odd numbered LEDs
        if (i % 2) == 0:
            led_strip.set_hsv(i, HUE_1 / 360, 1.0, BRIGHTNESS)
        else:
            led_strip.set_hsv(i, HUE_2 / 360, 1.0, BRIGHTNESS)
    time.sleep(SPEED)

    for i in range(NUM_LEDS):
        if (i % 2) == 0:
            led_strip.set_hsv(i, HUE_2 / 360, 1.0, BRIGHTNESS)
        else:
            led_strip.set_hsv(i, HUE_1 / 360, 1.0, BRIGHTNESS)
    time.sleep(SPEED)
4

This Learn article contains a basic explanation of how HSV works: Make rainbows with Unicorn HAT