#define txEnable 2
#define K1 3
#define K2 4
#define K3 5
#define K4 6
#define K5 7
#define K6 8
#define K7 9
#define K8 10

const byte dip[] = {14, 15, 16, 17, 18};
int bin;

int Relay_1;
int Relay_2;
int Relay_3;
int Relay_4;
int Relay_5;
int Relay_6;
int Relay_7;
int Relay_8;

int address;
char data[64] = {0};
int y100;
int y200;
int y300;
int commandEStop = 91;
int typeIdent = 325;

// Timer_1 variables
int state;
unsigned int a;
int blink;
long offTime = 1000;
long onTime = 1000;
unsigned long previousMillis;
unsigned long currentMillis;

void setup() {
  pinMode(K1, OUTPUT);
  pinMode(K2, OUTPUT);
  pinMode(K3, OUTPUT);
  pinMode(K4, OUTPUT);
  pinMode(K5, OUTPUT);
  pinMode(K6, OUTPUT);
  pinMode(K7, OUTPUT);
  pinMode(K8, OUTPUT);

  digitalWrite(K1, LOW);
  digitalWrite(K2, LOW);
  digitalWrite(K3, LOW);
  digitalWrite(K4, LOW);
  digitalWrite(K5, LOW);
  digitalWrite(K6, LOW);
  digitalWrite(K7, LOW);
  digitalWrite(K8, LOW);

  pinMode(dip[0], INPUT_PULLUP);
  pinMode(dip[1], INPUT_PULLUP);
  pinMode(dip[2], INPUT_PULLUP);
  pinMode(dip[3], INPUT_PULLUP);
  pinMode(dip[4], INPUT_PULLUP);

  delay(1000);

  Serial.begin(9600);
  previousMillis = 0;
  currentMillis = millis(); 
  a = HIGH;

  bin = 101;
  if(digitalRead(dip[0]) == LOW) {
    bin = bin + 1;
  }
  delay(10);
  if(digitalRead(dip[1]) == LOW) {
    bin = bin + 2;
  }
  delay(10);
  if(digitalRead(dip[2]) == LOW) {
    bin = bin + 4;
  }
  delay(10);
  if(digitalRead(dip[3]) == LOW) {
    bin = bin + 8;
  }
  delay(10);
  if(digitalRead(dip[4]) == LOW) {
    bin = bin + 16;
  }
  delay(10);
  address = bin;
  Serial.print(address);
  Serial.print(",");
  Serial.println(typeIdent);

  y200 = 0;
}

void loop() {
  timer_1();
  getSerialData();
  relay();

  while(y200 == commandEStop) {
    digitalWrite(K1, LOW);
    digitalWrite(K2, LOW);
    digitalWrite(K3, LOW);
    digitalWrite(K4, LOW);
    digitalWrite(K5, LOW);
    digitalWrite(K6, LOW);
    digitalWrite(K7, LOW);
    digitalWrite(K8, LOW);
    y200 = commandEStop;
    digitalWrite(LED_BUILTIN, HIGH);
    delay(500);
    digitalWrite(LED_BUILTIN, LOW);
    delay(500);
  }

}

void getSerialData() {

  byte n = Serial.available();
  if (n != 0) {
    byte m = Serial.readBytesUntil('\n', data, 64);
    data[m] = '\0'; //null-byte
    y100 = atoi(strtok(data, ","));
    y200 = atoi(strtok(NULL, ","));
    y300 = atoi(strtok(NULL, ","));

    if(y100 = address) {
      if(y200 == 0) {

      }
      else if(y200 == commandEStop) {
        digitalWrite(K1, LOW);
        digitalWrite(K2, LOW);
        digitalWrite(K3, LOW);
        digitalWrite(K4, LOW);
        digitalWrite(K5, LOW);
        digitalWrite(K6, LOW);
        digitalWrite(K7, LOW);
        digitalWrite(K8, LOW);
      }
      else if(y200 == 1) {
        Relay_1 = y300;
      }
      else if(y200 == 2) {
        Relay_2 = y300;
      }
      else if(y200 == 3) {
        Relay_3 = y300;
      }
      else if(y200 == 4) {
        Relay_4 = y300;
      }
      else if(y200 == 5) {
        Relay_5 = y300;
      }
      else if(y200 == 6) {
        Relay_6 = y300;
      }
      else if(y200 == 7) {
        Relay_7 = y300;
      }
      else if(y200 == 8) {
        Relay_8 = y300;
      }
    }

  }
}

void relay() {
  if(y200 != commandEStop) {
    if(Relay_1 == 1) {
      digitalWrite(K1, LOW);
    }
    else if(Relay_1 == 2) {
      digitalWrite(K1, HIGH);
    }
    else if(Relay_1 == 3) {
      if(blink == 1) {
        digitalWrite(K1, HIGH);
      }
      else if(blink == 0) {
        digitalWrite(K1, LOW);
      }
    }

    if(Relay_2 == 1) {
      digitalWrite(K2, LOW);
    }
    else if(Relay_2 == 2) {
      digitalWrite(K2, HIGH);
    }
    else if(Relay_2 == 3) {
      if(blink == 1) {
        digitalWrite(K2, HIGH);
      }
      else if(blink == 0) {
        digitalWrite(K2, LOW);
      }
    }

    if(Relay_3 == 1) {
      digitalWrite(K3, LOW);
    }
    else if(Relay_3 == 2) {
      digitalWrite(K3, HIGH);
    }
    else if(Relay_3 == 3) {
      if(blink == 1) {
        digitalWrite(K3, HIGH);
      }
      else if(blink == 0) {
        digitalWrite(K3, LOW);
      }
    }

    if(Relay_4 == 1) {
      digitalWrite(K4, LOW);
    }
    else if(Relay_4 == 2) {
      digitalWrite(K4, HIGH);
    }
    else if(Relay_4 == 3) {
      if(blink == 1) {
        digitalWrite(K4, HIGH);
      }
      else if(blink == 0) {
        digitalWrite(K4, LOW);
      }
    }

    if(Relay_5 == 1) {
      digitalWrite(K5, LOW);
    }
    else if(Relay_5 == 2) {
      digitalWrite(K5, HIGH);
    }
    else if(Relay_5 == 3) {
      if(blink == 1) {
        digitalWrite(K5, HIGH);
      }
      else if(blink == 0) {
        digitalWrite(K5, LOW);
      }
    }

    if(Relay_6 == 1) {
      digitalWrite(K6, LOW);
    }
    else if(Relay_6 == 2) {
      digitalWrite(K6, HIGH);
    }
    else if(Relay_6 == 3) {
      if(blink == 1) {
        digitalWrite(K6, HIGH);
      }
      else if(blink == 0) {
        digitalWrite(K6, LOW);
      }
    }

    if(Relay_7 == 1) {
      digitalWrite(K7, LOW);
    }
    else if(Relay_7 == 2) {
      digitalWrite(K7, HIGH);
    }
    else if(Relay_7 == 3) {
      if(blink == 1) {
        digitalWrite(K7, HIGH);
      }
      else if(blink == 0) {
        digitalWrite(K7, LOW);
      }
    }

    if(Relay_8 == 1) {
      digitalWrite(K8, LOW);
    }
    else if(Relay_8 == 2) {
      digitalWrite(K8, HIGH);
    }
    else if(Relay_8 == 3) {
      if(blink == 1) {
        digitalWrite(K8, HIGH);
      }
      else if(blink == 0) {
        digitalWrite(K8, LOW);
      }
    }
  }
  else if(y200 == commandEStop) {
    digitalWrite(K1, LOW);
    digitalWrite(K2, LOW);
    digitalWrite(K3, LOW);
    digitalWrite(K4, LOW);
    digitalWrite(K5, LOW);
    digitalWrite(K6, LOW);
    digitalWrite(K7, LOW);
    digitalWrite(K8, LOW);
  }
}

void timer_1() {
  currentMillis = millis(); 

  if ((a == HIGH) && (currentMillis - previousMillis >= offTime)) {
    a = LOW;
    previousMillis = currentMillis;
    blink = 1;
  }
  else if((a == LOW) && (currentMillis - previousMillis >= onTime)) {
    a = HIGH;
    previousMillis = currentMillis;
    blink = 0;
  }

}