String inputs;
#define relay1 2 //connect relay1 to pin 9
#define relay2 3 //connect relay2 to pin 8
#define relay3 4 //connect relay3 to pin 7
#define relay4 5 //connect relay4 to pin 6
#define relay5 6 //connect relay5 to pin 5
#define relay6 7 //connect relay6 to pin 4
#define relay7 8 //connect relay7 to pin 3
#define relay8 9 //connect relay8 to pin 2
void setup(){
  Serial.begin(9600); //set rate for communicating with phone
  pinMode(relay1, OUTPUT); //set relay1 as an output
  pinMode(relay2, OUTPUT); //set relay2 as an output
  pinMode(relay3, OUTPUT); //set relay1 as an output
  pinMode(relay4, OUTPUT); //set relay2 as an output
  pinMode(relay5, OUTPUT); //set relay1 as an output
  pinMode(relay6, OUTPUT); //set relay2 as an output
  pinMode(relay7, OUTPUT); //set relay1 as an output
  pinMode(relay8, OUTPUT); //set relay2 as an output
  digitalWrite(relay1, LOW); //switch relay1 off
  digitalWrite(relay2, LOW); //switch relay2 off
  digitalWrite(relay3, LOW); //switch relay1 off
  digitalWrite(relay4, LOW); //switch relay2 off
  digitalWrite(relay5, LOW); //switch relay1 off
  digitalWrite(relay6, LOW); //switch relay2 off
  digitalWrite(relay7, LOW); //switch relay1 off
  digitalWrite(relay8, LOW); //switch relay2 off
}
void loop(){
  while(Serial.available()){ //check if there are available bytes to read
    delay(10); //delay to make it stable
    char c = Serial.read(); //conduct a serial read
    if (c == '#'){
      break; //stop the loop once # is detected after a word
    }
    inputs += c; //means inputs = inputs + c
  }
  if (inputs.length() >0){
    Serial.println(inputs);
    if(inputs == "A"){
      digitalWrite(relay1, LOW);
    }
    else if(inputs == "a"){
      digitalWrite(relay1, HIGH);
    }
    else if(inputs == "B"){
      digitalWrite(relay2, LOW);
    }
    else if(inputs == "b"){
      digitalWrite(relay2, HIGH);
    }
    else if(inputs == "C"){
      digitalWrite(relay3, LOW);
    }
    else if(inputs == "c"){
      digitalWrite(relay3, HIGH);
    }
    else if(inputs == "D"){
      digitalWrite(relay4, LOW);
    }
    else if(inputs == "d"){
      digitalWrite(relay4, HIGH);
    }
    else if(inputs == "E"){
      digitalWrite(relay5, LOW);
    }
    else if(inputs == "e"){
      digitalWrite(relay5, HIGH);
    }
    else if(inputs == "F"){
      digitalWrite(relay6, LOW);
    }
    else if(inputs == "f"){
      digitalWrite(relay6, HIGH);
    }
    else if(inputs == "G"){
      digitalWrite(relay7, LOW);
    }
    else if(inputs == "g"){
      digitalWrite(relay7, HIGH);
    }
    else if(inputs == "H"){
      digitalWrite(relay8, LOW);
    }
    else if(inputs == "h"){
      digitalWrite(relay8, HIGH);
    }
    inputs="";
  }
}