Amazon.com: USB to Iic I2C UART Converter Adapter Module, 50Bps to 2MBps, Multiple Adjustable Communication Rates, USB to TTL Serial, 5V and 3.3V Outputs Suitable for Serial Data : Electronics
USB TO UART CONVERTER !! The CP2102 - Hackster.io
PL2303 USB to UART Converter Board - RobotShop
USB to UART Converter Circuit
Amazon.com: USB to TTL Serial 3.3V UART Converter Cable with FTDI Chip Terminated by 6 Way Header, Works with Galileo Gen2 Boards/BeagleBone Black/Minnowboard Max and More : Electronics