Deditec USB-RS232-TTl Stick Data gateway USB , RS232 | Conrad.com
Usb Cp2102 To Ttl Rs232 Usb Ttl To Rs485 Mutual Convert 6 In 1 Convert Module - Integrated Circuits - AliExpress
Amazon.com: NEXTION CP2102 6 in 1 USB to TTL Serial Adapter Module USB to TTL 485 232,TTL to 232 485,RS232 to 485 + 4P Dupont Cable Jumper Wire Female to Female Display Arduino Windows : Electronics
FTDI TTL-232RG-VSW5V USB to TC2030 Debug Cable | Tag-Connect
USB to TTL Serial Cable - Debug / Console Cable for Raspberry Pi : ID 954 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Multi USB/RS232/RS485/TTL Converter
USB to TTL serial cable - CP2102 | Kiwi Electronics
Amazon.com: WITMOTION USB-UART 6-in-1 USB to Serial Converter, Multifunctional (USB to TTL/RS485/232, TTL-RS232/485, 232 to 485), Universal Adapter Module with CP2102 Compatible with Windows 7/8/10,Linux, Arduino : Electronics