String Msg;
String Category;
String Function;
int Device_Number;
int First_Space;
int Second_Space;




void setup() {

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

}

void loop() {

 
 if(Serial.available() )
 {
  delay(20);
 Serial.print("Serial Available : ");
 Serial.println(Serial.available() );

Msg = Serial.readString();
First_Space = Msg.indexOf(" ");
Serial.print("First Space : ");
Serial.println(First_Space);
Second_Space = Msg.indexOf(" ",First_Space+1);
Serial.print("Second space : ");
Serial.println(Second_Space);
int Third_Space = Msg.indexOf(" ",Second_Space+1);
Serial.print("Second space : ");
Serial.println(Third_Space);

 }


}