int requestGroupData(char groupNum){
  setCurrDataGroup(groupNum);
  currGrpItems=knownGrpItems.get(Integer.valueOf(getCurrDataGroup()));
  char[] payLoad={groupNum};
  return (writeTelegram(payLoad,CMD_GROUP_READ,null));
}

int requestGroupData ( char groupNum ) { setCurrDataGroup ( groupNum ) ; currGrpItems = knownGrpItems . get ( Integer . valueOf ( getCurrDataGroup ( ) ) ) ; char [ ] payLoad = { groupNum } ; return ( writeTelegram ( payLoad , CMD_GROUP_READ , null ) ) ; }
send request to read group data
