multiplexed_4067.ino

#include "EncoderTool.h"
using namespace EncoderTool;

constexpr unsigned encoderCount = 16; // number of attached encoders

constexpr unsigned S0 = 0;    // address pin 0
constexpr unsigned S1 = 1;    //...
constexpr unsigned S2 = 2;    //...
constexpr unsigned S3 = 3;    // address pin 3
constexpr unsigned SIG_A = 4; // output pin SIG of multiplexer A
constexpr unsigned SIG_B = 5; // output pin SIG of multiplexer B
                              // breakout:  https://www.sparkfun.com/products/9056
                              // datasheet: https://www.ti.com/lit/gpn/CD74HC4067

EncPlex4067 encoders(encoderCount, S0, S1, S2, S3, SIG_A, SIG_B);

void setup()
{
    encoders.begin();
}

void loop()
{
    encoders.tick();

    for (unsigned i = 0; i < encoderCount; i++)
    {
        if (encoders[i].valueChanged())
        {
            Serial.print("Encoder:");
            Serial.print(i);
            Serial.print(" value:");
            Serial.println(encoders[i].getValue());
        }
    }
}