const int MUX_S0 = 33;   // Multiplexer control pin S0
const int MUX_S1 = 32;   // Multiplexer control pin S1
const int MUX_S2 = 35;   // Multiplexer control pin S2
const int MUX_S3 = 34;   // Multiplexer control pin S3

const int MUX_SIG_PIN = 15; // Multiplexer signal pin connected to ESP32 analog input

const int NUM_POTENTIOMETERS = 5; // Number of potentiometers connected

void setup() {
  // Set up the multiplexer control pins as outputs
  pinMode(MUX_S0, OUTPUT);
  pinMode(MUX_S1, OUTPUT);
  pinMode(MUX_S2, OUTPUT);
  pinMode(MUX_S3, OUTPUT);
  
  // Initialize the Serial Monitor
  Serial.begin(115200);
}

void loop() {
  // Loop through the number of potentiometers
  for (int pot = 0; pot < NUM_POTENTIOMETERS; pot++) {
    // Set the multiplexer control pins to select the correct channel
    setMuxControlPins(pot);
    
    // Read the analog value from the selected channel
    int potValue = analogRead(MUX_SIG_PIN);
    
    // Print the value to the Serial Monitor
    Serial.print("Potentiometer ");
    Serial.print(pot);
    Serial.print(": ");
    Serial.println(potValue);
    
    // Delay before reading the next potentiometer
    delay(500);
  }
}

// Function to set the multiplexer control pins
void setMuxControlPins(int channel) {
  digitalWrite(MUX_S0, bitRead(channel, 0));
  digitalWrite(MUX_S1, bitRead(channel, 1));
  digitalWrite(MUX_S2, bitRead(channel, 2));
  digitalWrite(MUX_S3, bitRead(channel, 3));
}