int id = 0;

int CTS = 2;
int sleep = 3;

int flag1 = 0;
int flag2 = 0;
int flag3 = 0;
int flag4 = 0;

unsigned long time=0;
unsigned long time_sleep=5000;


void setup()                    // run once, when the sketch starts
{
  Serial.begin(19200);
  pinMode(16, INPUT);   
  pinMode(17, INPUT);  
  pinMode(18, INPUT);  
  pinMode(19, INPUT);  
  pinMode(CTS, INPUT); 
  pinMode(sleep, OUTPUT); 
  Serial.print("RESET");
  time=millis();
  digitalWrite(sleep,LOW);
}

void loop()                     // run over and over again
{
  /*if (((millis()-time)>=time_sleep)&&(!flag1)&&(!flag2)&&(!flag3))
  {
    digitalWrite(sleep,HIGH);
  }
  else if (flag1||flag2||flag3) 
  {
    digitalWrite(sleep,LOW);
    time=millis();
  }*/

  if ((digitalRead(19))&&(flag1==0))
  {
    flag1=1;
    Serial.println("S5 ON");
  }
  else if((!digitalRead(19))&&(flag1==1))
  {
    flag1=0;
    Serial.println("S5 OFF");
  }

  if ((digitalRead(18))&&(flag2==0))
  {
    flag2=1;
    Serial.println("S4 ON");
  }
  else if((!digitalRead(18))&&(flag2==1))
  {
    flag2=0;
    Serial.println("S4 OFF");
  }

  if ((digitalRead(16))&&(flag3==0))
  {
    flag3=1;
    Serial.println("S2 ON");
  }
  else if((!digitalRead(16))&&(flag3==1))
  {
    flag3=0;
    Serial.println("S2 OFF");
  }
  
  if ((digitalRead(17))&&(flag4==0))
  {
    flag4=1;
    Serial.println("S3 ON");
  }
  else if((!digitalRead(17))&&(flag4==1))
  {
    flag4=0;
    Serial.println("S3 OFF");
  }
}