This device is in the automatic HID operating mode:

No drivers are required for this function; the device logs on to the computer as a standard keyboard.

…

If you want to use a different RFID standard, set the output of the UID differently or read a part from the user memory, please use the "HID Setting" software to set or switch off the automatic operating mode.

In this case, please check whether the drivers for the COM interface are correctly installed in the device manager under "Ports (COM & LPT)" => USB-SERIAL CH340 (COMx). There should be no yellow exclamation mark here.

