I'm looking for a robust way to list the available serial (COM) ports on a Windows machine. There's this post about using WMI, 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.
I currently know of two other approaches:
Reading the information in the
HARDWARE\\DEVICEMAP\\SERIALCOMM registry key. This looks like a great option, but is it robust? I can't find a guarantee online or in MSDN that this registry cell indeed always holds the full list of available ports.
Tryint to call
COMN 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.
Any other methods/ideas/experience to share?
Edit: by the way, here's a simple Python implementation of reading the port names from registry:
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), str(val)) except EnvironmentError: break
Several options are available:
Call SetupDiGetClassDevs with a ClassGuid of GUID_DEVINTERFACE_COMPORT.
Using pySerial with Python:
import serial.tools.list_ports ports = list(serial.tools.list_ports.comports()) for p in ports: print p