Do stuff for multiple pixelBus stripes.

pixelBusHelper.cpp

#include <Arduino.h>
#include <NeoPixelBus.h>
#include <NeoPixelAnimator.h>

const int amountLeds = 20;

// ggf. hier den generischen teil(<..,..>) von NeoPixelBus an deine stripes anpassen.
typedef NeoPixelBus<NeoRbgFeature, NeoEsp32BitBang800KbpsMethod> stripeDef;
stripeDef stripe1(amountLeds, 21);
stripeDef stripe2(amountLeds, 23);

typedef std::function<void(stripeDef *)> stripeFunctionType;
void forAllStripes(stripeFunctionType stripeFunction)
{
    stripeFunction(&stripe1); // Hier stripe 1 eintragen
    stripeFunction(&stripe2); // hier stripe 2 eintragen.
}

///////////////////////////////////////////
// Der Teil hierdrunter ist nur beispüiel.,.
///////////////////////////////////////////

void setup()
{
    forAllStripes([](stripeDef *stripe) {
        (*stripe).Begin();
        (*stripe).Show();
    });
}

int colorVal = 0;
bool flip = false;
void loop()
{
    delay(10); // Just for visibility.
    RgbColor color(colorVal, colorVal, colorVal);
    forAllStripes([color](stripeDef *stripe) {
        for (int i = 0; i < amountLeds; i++)
            (*stripe).SetPixelColor(i, color);
        (*stripe).Show();
    });

    if (colorVal >= 128)
        flip = true;
    else if (colorVal <= 1)
        flip = false;

    if (flip)
        colorVal--;
    else
        colorVal++;
}