![]() The tools used (PuTTY, RealTerm, ESP-IDF) will access these as COM ports (e.g. Need to use some USB-to-UART serial devices from within Windows 10 and Windows 8.1 VMs. VMware Workstation Pro 15 on a Windows 10 host. ![]() ![]() The solution I found is to change the USB compatibility setting of the VM from USB 3.0 to USB 2.0. Unable to open serial port" would appear, even though Windows Device Manager indicated ports were working correctly. PuTTY) tried to open COM ports in Windows VM for CP210x-based USB-to-UART devices.Įrror messages such as "Unable to open connection to COM4. I was having errors when certain applications (e.g.
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