byte[] createPacket(String s){
  byte b[]=StringUtil.bytesFromHexString(s);
  if (b.length == 0) {
    return null;
  }
  return b;
}

byte [ ] createPacket ( String s ) { byte b [ ] = StringUtil . bytesFromHexString ( s ) ; if ( b . length == 0 ) { return null ; } return b ; }
create a well - formed dcc packet from a string
