Message handling

#define MAXARGS 8

int argsBuffer[MAXARGS];
int argsID = 0;

/// <summary>Serial.available() returns how many bytes are stored in the internal serial buffer.  Serial.read() returns the next byte in the and removes it from the serial buffer (which decrements Serial.available() by one).  This code will store all incoming argument bytes into an array called argsBuffer which will be used in the command function.</summary>
void loop(){
  //message handling
  int done = 0, header;
  while(Serial.available() > 0){
    int data = Serial.read();
    if(data >= 128){
      header = data;
      memset(argsBuffer, 0, MAXARGS);
      argsID = 0;
      done = 1;
    }else if (argsID <= MAXARGS){
      argsBuffer[argsID++] = data;
    }
  }
  if(done){
    command(header);
    done = 0;
  }
}

void command(int header){
  switch(header){
    case 255:
      //LED ON function
      break;
    case 254:
      //LED OFF function
      break;
    //...
  }
}