Only first USB interface of an multiple interface device is listed

[coelsner]

• SerialPort Version: v6.2.0 + v.4.0.7
• NodeJS Version: 8.11.3
• Operating System: Windows 10

Summary of Problem

Only first USB interface of an multiple interface device is listed.

Steps and Code to Reproduce the Issue

I have a device (which is unfortunately not public yet) which has multiple USB interfaces.
On my Windows 10 machine it serialport lists only the first COM interface, but if I know the right COM port it is possible to interact with this port. On Linux this isn't a problem.

I think the problem is that only the main device in the windows registry is read (see serialport_win.cpp line 695+)

The path of the other interfaces are listed in my registry like this:

• HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\VID_1234&PID_1234
• HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\VID_1234&PID_1234&MI_00
• HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\VID_1234&PID_1234&MI_01
• HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\VID_1234&PID_1234&MI_02
• HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\VID_1234&PID_1234&MI_03

I found issue #1459 which also addresses this problem, but am I right that the solution don't "tests" those other interfaces? Unfortunately I'm not that into C++ (Windows) programming that I could investigate or fix this by myself. 😟

[reconbot]

Nobody is a c++ programmer until they try ;-)

I'll keep this open as a bug. I don't have any comparable hardware to test on myself.