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POListing serial (COM) ports on Windows?
 

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  1. POListing serial (COM) ports on Windows?
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    <p>I'm looking for a robust way to list the available serial (COM) ports on a Windows machine. There's <a href="https://stackoverflow.com/questions/1081871/how-to-find-available-com-ports">this post about using WMI</a>, but I would like something less .NET specific - I want to get the list of ports in a Python or a C++ program, without .NET.</p> <p>I currently know of two other approaches:</p> <ol> <li><p>Reading the information in the <code>HARDWARE\\DEVICEMAP\\SERIALCOMM</code> registry key. This looks like a great option, but is it <strong>robust</strong>? I can't find a guarantee online or in MSDN that this registry cell indeed always holds the full list of available ports.</p></li> <li><p>Tryint to call <code>CreateFile</code> on <code>COMN</code> with N a number from 1 to something. This isn't good enough, because some COM ports aren't named COMN. For example, some virtual COM ports created are named CSNA0, CSNB0, and so on, so I wouldn't rely on this method.</p></li> </ol> <p>Any other methods/ideas/experience to share?</p> <p><strong>Edit:</strong> by the way, here's a simple Python implementation of reading the port names from registry:</p> <pre><code>import _winreg as winreg import itertools def enumerate_serial_ports(): """ Uses the Win32 registry to return a iterator of serial (COM) ports existing on this computer. """ path = 'HARDWARE\\DEVICEMAP\\SERIALCOMM' try: key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, path) except WindowsError: raise IterationError for i in itertools.count(): try: val = winreg.EnumValue(key, i) yield (str(val[1]), str(val[0])) except EnvironmentError: break </code></pre>
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    1. COGreat! It works very well
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    2. COLooks very useful to find com ports - I'm going to try and use it to find Arduino port
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