Why not using the solution they place there?

<quoting their wiki page>

Windows

Unfortunately, these objects have not yet been compiled for Windows. Until they are, you can use a small utility program that receives incoming serial data and sends it to a network port as UDP data.


</quoting their wiki page>

Or you wanted a single object that could perform that in Windows?

<quoting their wiki page>
Or, you can download the source from pd_OSCserial_src20070810.tar.gz. If you want to develop these objects at CCRMA with the subversion repository, you must belong to the pid group. E-mail gurevich (at) ccrma and carrlane (at) ccrma to request to be added to the group.
</quoting their wiki page>

Or... you can always try to compile the source in windows and make the needed changes.



2010/5/12 Ricardo Dueñas Parada <rduenasp@gmail.com>
sing an AVRmini board to pass data from several sensors to pd
via OSC (USB), and I can do it on Linux with the objects pd_OSCSerial



--
Pedro Lopes
contacto: jazz@radiozero.pt
website: http://web.ist.utl.pt/Pedro.Lopes