my ($receivedBytes, $data) = $HandleToRS232->read();

##</code><code>##

my ($receivedBytes, $data) = $HandleToRS232->read_bg();

##</code><code>##

my($done, $count_in, $string_in) = $HandleToRS232->read_done(1);

##</code><code>##

my ($result) = Win32API::CommPort::ReadFile(
$HandleToRS232,$data,$NumberOfBytesToRead,
$ActualReadBytes,$template);