//by Nissanka MD SLCOTM
String incom_Msg;

void setup() {
  
  Serial.begin(9600);
  Serial.println("Enter the command");

}

void loop() {
 
 if(Serial.available()>0)
 {
  delay(50);
  Serial.print("Serial Message Size : ");
  Serial.println(Serial.available());
  incom_Msg = Serial.readString();
  Serial.print("Incomming Message : ");
  Serial.println(incom_Msg);
  //incom_Msg.trim();

  if(incom_Msg.indexOf("\n") >= 0);
  {
    Serial.print("Newline Character found at position : ");
    Serial.println(incom_Msg.indexOf('\n'));
    incom_Msg.replace("\n", " ");
    Serial.println("Newline Character removed");
  }

   if(incom_Msg.indexOf("\r") >= 0);
  {
    Serial.print("Carriage return Character found at position : ");
    Serial.println(incom_Msg.indexOf("\r"));
    incom_Msg.replace("\r", " ");
    Serial.println("Carriage return Character removed");
  }

    Serial.print("modified incomming Message (CR and NL removed) : ");
    Serial.println(incom_Msg);
    Serial.print("lenght of midified Message : ");
    Serial.println(incom_Msg.length());


  while (incom_Msg.indexOf("  ") >= 0) // if double spaces present
    {  
    incom_Msg.replace("  ", " "); // double space replaced with single space
    }
  incom_Msg.trim(); // remove leading space if exisist
  Serial.print("Duplicate Spaces Trimmed Message : ");
  Serial.println(incom_Msg);
  Serial.print("Duplicate Spaces Trimmed Message Size : ");
  Serial.println(incom_Msg.length());

 

  incom_Msg.toUpperCase();
  Serial.print("Message Converted to All Caps : ");
  Serial.println(incom_Msg);
  

 }
 

}