void setup() {
  // put your setup code here, to run once:

#define S0 0
#define S1 1
#define S2 2
#define S3 3
#define MV A0
#define FV 4
#define EN1 5
#define EN2 6
#define EN3 7
#define EN4 8
#define EN5 9
#define EN6 10
#define EN7 11
#define EN8 12
#define EN9 13

double volt;

pinMode(S0, OUTPUT);
pinMode(S1, OUTPUT);
pinMode(S2, OUTPUT);
pinMode(S3, OUTPUT);
pinMode(MV, INPUT);
pinMode(EN1, OUTPUT);
pinMode(EN2, OUTPUT);
pinMode(EN3, OUTPUT);
pinMode(EN4, OUTPUT);
pinMode(EN5, OUTPUT);
pinMode(EN6, OUTPUT);
pinMode(EN7, OUTPUT);
pinMode(EN8, OUTPUT);
pinMode(EN9, OUTPUT);

//digitalWrite(EN1, HIGH);
//digitalWrite(EN2, HIGH);
//digitalWrite(EN3, HIGH);
//digitalWrite(EN4, HIGH);
//digitalWrite(EN5, HIGH);
//digitalWrite(EN6, HIGH);
//digitalWrite(EN7, HIGH);
//digitalWrite(EN8, HIGH);
//digitalWrite(EN9, HIGH);

Serial.begin(9600);

}

void loop() {

digitalWrite(FV, HIGH);

for (int EN=5; EN<14; EN++){

digitalWrite(EN, LOW);

for (int i=0; i<16; i++) {
  if (i==0){
    digitalWrite(S0, LOW);
    digitalWrite(S1, LOW);
    digitalWrite(S2, LOW);
    digitalWrite(S3, LOW);
  }
  else if (i==1){
    digitalWrite(S0, HIGH);
    digitalWrite(S1, LOW);
    digitalWrite(S2, LOW);
    digitalWrite(S3, LOW);
  }
    else if (i==2){
    digitalWrite(S0, LOW);
    digitalWrite(S1, HIGH);
    digitalWrite(S2, LOW);
    digitalWrite(S3, LOW);
  }
    else if (i==3){
    digitalWrite(S0, HIGH);
    digitalWrite(S1, HIGH);
    digitalWrite(S2, LOW);
    digitalWrite(S3, LOW);
  }
    else if (i==4){
    digitalWrite(S0, LOW);
    digitalWrite(S1, LOW);
    digitalWrite(S2, HIGH);
    digitalWrite(S3, LOW);
  }
    else if (i==5){
    digitalWrite(S0, HIGH);
    digitalWrite(S1, LOW);
    digitalWrite(S2, HIGH);
    digitalWrite(S3, LOW);
  }
    else if (i==6){
    digitalWrite(S0, LOW);
    digitalWrite(S1, HIGH);
    digitalWrite(S2, HIGH);
    digitalWrite(S3, LOW);
  }
    else if (i==7){
    digitalWrite(S0, HIGH);
    digitalWrite(S1, HIGH);
    digitalWrite(S2, HIGH);
    digitalWrite(S3, LOW);
  }
    else if (i==8){
    digitalWrite(S0, LOW);
    digitalWrite(S1, LOW);
    digitalWrite(S2, LOW);
    digitalWrite(S3, HIGH);
  }
    else if (i==9){
    digitalWrite(S0, HIGH);
    digitalWrite(S1, LOW);
    digitalWrite(S2, LOW);
    digitalWrite(S3, HIGH);
  }
    else if (i==10){
    digitalWrite(S0, LOW);
    digitalWrite(S1, HIGH);
    digitalWrite(S2, LOW);
    digitalWrite(S3, HIGH);
  }
    else if (i==11){
    digitalWrite(S0, HIGH);
    digitalWrite(S1, HIGH);
    digitalWrite(S2, LOW);
    digitalWrite(S3, HIGH);
  }
    else if (i==12){
    digitalWrite(S0, LOW);
    digitalWrite(S1, LOW);
    digitalWrite(S2, HIGH);
    digitalWrite(S3, HIGH);
  }
    else if (i==13){
    digitalWrite(S0, HIGH);
    digitalWrite(S1, LOW);
    digitalWrite(S2, HIGH);
    digitalWrite(S3, HIGH);
  }
    else if (i==14){
    digitalWrite(S0, LOW);
    digitalWrite(S1, HIGH);
    digitalWrite(S2, HIGH);
    digitalWrite(S3, HIGH);
  }
    else if (i==15){
    digitalWrite(S0, HIGH);
    digitalWrite(S1, HIGH);
    digitalWrite(S2, HIGH);
    digitalWrite(S3, HIGH);
  }

  delay(300);
  double volt = 5*(analogRead(MV))/1023;
  if (volt > 4.95){
  Serial.print("Bank ");
  Serial.print(EN);
  Serial.print(" Ch");
  Serial.print(i);
  Serial.print(" is OK ");
  Serial.println(volt);
  }
  else{
  Serial.print("Bank ");
  Serial.print(EN);
  Serial.print(" Ch");
  Serial.print(i);
  Serial.print(" is RESISTIVE. ");
  Serial.println(volt);  }
  
}

digitalWrite(EN, HIGH);

}

}