20pcs CP2102 USB to TTL Serial Adapter Module USB to UART Converter Debugger Programmer for Pro Mini OPEN-SMART for Arduino - products that work with official for Arduino boards
CP2102 USB to TTL Uart Serial Convertor Module - ElectroPeak
USB Serial(TTL) Converter
CH340G CH340 USB TTL Serial Adapter UART FTDI Router Upgrade ESP8266 Arduino | eBay
CH340 USB to TTL Converter UART Module CH340G (3.3 V/5.5 V) | Elektor
Amazon.com: USB to TTL Adapter, USB to Serial Converter for Development Projects - Featuring Genuine FTDI USB UART IC 'FT232RL' : Electronics
USB to TTL Serial Cable - Debug / Console Cable for Pi
Witmotion Usb To Ttl Rs485 Rs232 Multi-function Serial Interface Module 3.3v And 5v Input Serial Converter - Smart Activity Trackers - AliExpress
USB-TTL Serial CH340 Board – ElectroDragon
Adafruit - USB to TTL Serial Cable - Debug / Console Cable for Victor BB / Raspberry P - Adafruit 954i #954-PL2303
DEBO USB TTL: Raspberry Pi USB TTL Interface Converter, CH340G at reichelt elektronik
USB to TTL Serial Bare-Ended, FTDI, 5V TTL
FTDI Serial TTL-232 USB Cable : ID 70 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
USB to TTL Serial Cable (5V VCC) - CAB-17831 - SparkFun Electronics
TTL-232R-5V - FTDI
USB to TTL 232R 3.3V FTDI Cable Open Wired End Pre-Tinned