This is HL-340 USB serial port (COM) USB to RS232 USB Nine Serial Line Support Windows 7-64. USB to RS232 conversion cable for USB and serial devices easily connect serial devices with features such as Plug and play, hot-swappable.

Can meet the notebook connected to the serial device, apply to mini-phones, digital cameras, communication MODEM, ISDN terminal adapters, LED control card.

If you already have the I2C adapter soldered onto the board like in this product, the wiring is quite easy.