#define S0 4 // Connect sa digital pin 2 sa Arduino Nano
#define S1 5 // Connect sa digital pin 3 sa Arduino Nano
#define S2 6 // Connect sa digital pin 4 sa Arduino Nano
#define S3 7 // Connect sa digital pin 5 sa Arduino Nano
#define ANALOG A0 // Connect sa analog pin A0 sa Arduino Nano

const int numChannels = 16; // Number of channels
int sensorValues[numChannels]; // Array to store sensor readings

void setup() {
  pinMode(S0, OUTPUT);
  pinMode(S1, OUTPUT);
  pinMode(S2, OUTPUT);
  pinMode(S3, OUTPUT);
  pinMode(ANALOG, INPUT);

  Serial.begin(9600);
}

void readSensor(int channel) {
  digitalWrite(S0, (channel & 0x01) ? HIGH : LOW);
  digitalWrite(S1, (channel & 0x02) ? HIGH : LOW);
  digitalWrite(S2, (channel & 0x04) ? HIGH : LOW);
  digitalWrite(S3, (channel & 0x08) ? HIGH : LOW);
  
  sensorValues[channel] = analogRead(ANALOG);
}

void loop() {
  for (int channel = 0; channel < numChannels; channel++) {
    readSensor(channel);
    Serial.print("Sensor "); 
    Serial.print(channel); 
    Serial.print(" : "); 
    Serial.println(sensorValues[channel]);
  }
  
  Serial.println("****************");
  delay(100);
}