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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