If the device has no serial number, Windows will make one up based on where you connect it (so that it can tell the difference between identical devices connected to different USB ports). If the devices have identical serial numbers, Windows may become confused if "one device" is plugged into two USB ports at the same time. Some serial-port-converter devices are configured without serial numbers, or with identical serial numbers, specifically so that they all look identical, and are identically given the same port number. Windows identifies USB devices by Vendor ID (vID), Product ID (pID), and Serial Number.īy default, your computer will give that device the same Serial Port COM number no matter how you plug it in. I would assume by Vendor and/or Product ID, but I am not sure.
Question: How does windows identify the inserted device?. Using a different converter (from a different manufacturer) i verify that it is assigned to a different COM port (in my case COM4).Ĭonclusion: It seems like windows is capable of identifying the inserted converter device, and configure the COM port with its previous setting.Using converter no 2 (From same manufacturer) i verify the same result as with converter no 1.When moving converter no 1 between USB 1 and 2 i verify that the configured COM port settings are remembered.I pull it out and insert the converter no 1 into USB port no 2 and configure it as COM10 in device manager.I insert converter no 1 into USB port no 1 and configure it as COM9 in device manager.I have 2 similar USB to Serial converters from the same manufacturer and 1 converter from a different manufacturer.I have run a test to verify, that windows (7 and 8) is capable of remembering the configured com port number for each usb port when i insert an usb->serial converter.
0 kommentar(er)
