I'm happy to announce a release candidate of pySerial: 2.5-rc1 http://pyserial.sourceforge.net/ Whats new: - Updated documentation (now using Sphinx, see link above). - Windows implementation uses ctypes (instead of pywin32). - Python 3.x compatibility. - Using "bytes" type when available. - Works together with Pythons new io library. - Several bugfixes. - Updated and new examples. - See CHANGES.txt in the distribution for full list. Source archive and Windows installers can be downloaded from here: http://sourceforge.net/projects/pyserial/files/ The Windows installer for Python 3.x has py3k in its name, the other one is for Python 2.x. The source archive's setup.py should automatically convert using 2to3 when run with Python 3.x. chris -- What is pySerial? Quoting from the home page: This module encapsulates the access for the serial port. It provides backends for Python running on Windows, Linux, BSD (possibly any POSIX compliant system), Jython and IronPython (.NET and Mono). The module named "serial" automatically selects the appropriate backend.