The Virtual COM (VCOM) interface requires a VCOM driver to be installed on PC first. The driver can be found at: Nu-Link_USB_Driver. Execute "Nu-Link_USB_Driver 1.x ...
Arduino Uno board (or clone) plastic project box (search for "ABS Plastic Electronic Enclosure Project Box Black 103x64x40mm" on Banggood, it's about $3.5) 3.5mm panel mounted stereo jack socket (eBay ...