DC 3.3V USB to ESP8266 ESP 01 WiFi Adapter Module CH340 CH340G USB to TTL Driver Serial Wireless Wifi Module for Arduino 300mA|Integrated Circuits| - AliExpress
ESP8266 ESP-01 USB Serial Programmer with CH340 (Fix Programming Issue) - Maker Advisor
Amazon.com: Stemedu 2PCS ESP01 ESP8266 Programmer Serial Adapter, USB to ESP-01 Wireless Programming Debug WiFi Module with CH340G, 4.5-5.5V UART PROG, 115200 Baud Rate : Electronics