Amazon.com: 10Gtek# USB to ESP8266 ESP-01 Serial Adapter, USB to TTL Driver Serial Compatible with Arduino, Pack of 2 : Electronics
USB-to-serial adapter - Wikipedia
USB to ESP8266 ESP-01 Wi-Fi Adapter Module w/ CH340G USB to TTL Driver Serial Wireless Adapter On-board 3.3V LDO for Arduino
Amazon.com: WITMOTION USB-UART Converter 3-in-1 Multifunctional(USB to TTL/ USB to RS232/ USB to RS485) 3.3-5V Serial Adapter, with CH340 chip Compatible with Windows 7,8,Linux,Arduino for Development Projects : Electronics
CH340 CH340G USB To TTL ESP8266 ESP 07 ESP07 WiFi Wireless Development – diymore
Amazon.com: DSD TECH USB to TTL Serial Converter CP2102 with 4 PIN Dupont Cable Compatible with Windows 7,8,10,Linux,Mac OSX : Electronics
Usb to Serial/TTL Adapter : 5 Steps - Instructables
USB interface converter | Joy-IT
Usb Ttl Serial Converter Adapter Module 5v 3.3v | Usb Serial Adapter Ftdi 3.3v - Chip - Aliexpress