Note. Virtual COM ports are still widely used in Windows, although modern computers almost never have physical serial COM ports on the motherboard. For example, virtual COM ports are currently used by USB (USB-to-UART, USB-to-COM, USB modem, card/RFID reader) and Bluetooth adapters. Conten...
I have a serial peripheral that works great on my Windows 10 desktop, using a USB-Serial cable. When I try to use the peripheral on a Windows 11 laptop (I tried two of them from different manufacturers), I get a message that the COM port is in use. COM…
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COM ports have long provided a convenient way for PCs and embedded systems to exchange information. The traditional COM port on a PC is an RS-232 serial port on a motherboard or expansion card. Recent PCs often skip RS-232 in favor of USB. But with the right firmware, a USB device ...
A user has an old program which needs to use COM1 to access door system.The user’s computer is changed from WinXP to Win10 Pro which doesn’t has COM port. So will use USB to serial cable.After installed the usb serial cable, it is shown as "USB Serial Port (COM3)"....
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If you do not know what is vid/pid : Briefly say, it is USB device firmware replying computer what device it is in seral number. We could use pid/vid + google to indentify the device, even there is no correspending driver. You need to set hSerial as invalid in the begining of that...
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"IOPCIFamily.kext" is the standard Apple USB parent kext. Your ASMedia ports are being recognised by macOS now, and we can see a device attached - Datatraveler. However it sounds as though they are not "mounting" on the desktop. If you are still using Big Sur then you may be up...