USB 2.0 to UART TTL 6 Pin 3.3V and 5V Power – DitroniX.net Electronic Innovation IoT Designs
Amazon.com: Waveshare USB UART Board (Type A) Single-Chip USB to UART Data Transfer Convertor Module Development Board Supports Mac, Linux, Android, Wince, Windows 7/8/8.1/10/11... : Electronics
FTDI USB to TTL UART Adapter - Reliable SD cards for industrial Raspberry Pi
USB-UART CH340C converter board
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
USB UART/I2C Debugger for Raspberry Pi, Arduino from SB Components on Tindie
USB UART 4 click - USB-to-UART interface module | MikroElektronika