// defining constants
const int d1_pin = 3;
const int d2_pin = 4;
const int ol_pin = 2;
const int rly1 = 7;
const int rly2 = 8;
const int flt_led = 13;

// defining variables
int d1_current=0;
int d1_last=0;
int d2_current=0;
int d2_last=0;
int ol_state=0;
int flt_cond=false;
int actuating=false;
int i = 0;



void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(d1_pin, INPUT);
pinMode(d2_pin, INPUT);
pinMode(ol_pin, INPUT);
pinMode(rly1, OUTPUT);
pinMode(rly2, OUTPUT);
pinMode(flt_led, OUTPUT);
}


void loop() {
 
  d1_current = digitalRead(d1_pin);
  d2_current = digitalRead(d2_pin);
  ol_state=digitalRead(ol_pin);

  /*Serial.print("d1-current= ");
  Serial.print(d1_current);
  Serial.print("    ");
  Serial.print("d1-last= ");
  Serial.print(d1_last);
  Serial.print("    ");
  Serial.print("Overload = ");
  Serial.print(ol_state);
  Serial.print("    ");
  Serial.print("Counter = ");
  Serial.print(i);
  Serial.print("    ");
  Serial.print("Actuate = ");
  Serial.println(actuating);*/
    

  if (d1_current == HIGH && d2_current == HIGH){
    flt_cond=true;
    actuating = 0;
    digitalWrite(flt_led, HIGH);
    digitalWrite(rly2, LOW);
    digitalWrite(rly1, LOW);
  }
    
    if (d1_current != d2_current){
    flt_cond=false;
    digitalWrite(flt_led, LOW);
  }
  if (d2_last == HIGH && d2_current == LOW && d1_current == HIGH){
    i = 0;
  }


  if (d1_current != d1_last && flt_cond != true) {
    if (d1_current == HIGH){
      actuating = 1;
    }
    if (d1_current == LOW){
      delay(50);
      i = 0;
      d1_last = d1_current;
    }
  }

            if (actuating == 1 && ol_state == LOW && flt_cond != true){
                
              digitalWrite(rly2, LOW);
              digitalWrite(rly1, HIGH);
            }
            if (actuating == 1 && (ol_state == HIGH | i>=200)) {
              digitalWrite(rly1, LOW);
              actuating = 0;
              i=0;
              delay(50);
              d1_last = d1_current;

            }
     

      
    
      


   if (d2_current != d2_last && flt_cond != true) {
    if (d2_current == HIGH){
      actuating = 2;
    }
    if (d2_current == LOW){
      delay(50);
      i = 0;
      d2_last = d2_current;
    }
   }
      
    if (actuating == 2 && ol_state == LOW){
      digitalWrite(rly1, LOW);
      digitalWrite(rly2, HIGH);
    }
    if (actuating == 2 && (ol_state == HIGH | i>=200)) {
    digitalWrite(rly2, LOW);
    actuating = 0;
    i=0;
    delay(50);
    d2_last = d2_current;
    }
    

   
    if (actuating == 1 | actuating == 2){
      i=i+1;
      delay(50);
      d2_last = d2_current;
    }
    
} 
  
  
  // put your main code here, to run repeatedly: