RS485 Serial Communication Between Arduino Mega and Arduino Pro Mini

void setup() {
  
  Serial1.begin(9600);//Using Serial1 Port
  Serial.begin(9600);
  pinMode(8, OUTPUT);//DE/RE Controling pin of RS-485
}

void loop() {
  char getdata='m';

  digitalWrite(8,HIGH);//DE/RE=HIGH Transmit Enabled M1
  Serial1.print('9');//Write '9' and Fetch Data From Pro Mini
   
  digitalWrite(8,LOW);//DE/RE=LOW Receive Enabled M1
  delay(1000);
  
  if(Serial1.available()){ //If Serial Data is available
    
    while(Serial1.available() && getdata!='d')
    { 
    getdata=Serial1.read();
    Serial.print(getdata);
    }
    
    Serial.println("");
    }
}

void setup() {
    
  //Serial1.begin(9600);//Uncomment for Arduino Lenardo
  Serial.begin(9600);
  //while(!Serial1);//Uncomment for Arduino Lenardo
	


  pinMode(13, OUTPUT);//Led Connected
  pinMode(8, OUTPUT);//DE/RE Controling pin of RS-485
}

void loop() {
  // put your main code here, to run repeatedly:
  char getdata='c';

  digitalWrite(13,LOW);//Led OFF
  digitalWrite(8,LOW);//DE/RE=LOW Receive Enabled

   if(Serial.available()){
    getdata=Serial.read();
    }
    
   if(getdata='9'){
      digitalWrite(8,HIGH);//DE/RE=HIGH Transmit Enabled 
      Serial.print("AcruxTek");
      Serial.print("Isld");
    }
    
delay(2000);
digitalWrite(13,HIGH);//Led ON
delay(2000);
}