Yacht Devices YDNU-02NF User Manual - page 14

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Figure 2. Advanced Settings of COM port

Port speed and related parameters have no practical effect on USB serial devices, so you can leave  

the defaults for these parameters.

After changing the COM port number, you need eject the Device from the USB port and insert it back. Until 

doing this, applications may fail to open the Device’s port.

2.  Other Microsoft Windows versions

Open  the  “Device  Manager”  in  the  “Computer  Management”  applet  of  the  Control  Panel.  If  the  Device 

appears in the “Other devices” section after connection and has a yellow notification sign, then you need  

to install a driver. You need only the .INF file (no code installation is required) which will link the Device 

with the standard USBSER.SYS driver of Microsoft Windows.