Amazon.com: Wishiot ESP8266 ESP-01S 4MB Serial WiFi Wireless Transceiver Module + CH340G Programmer USB to ESP-01 Wireless Adapter Module 4.5-5.5V : Electronics
5pcs NodeMCU V3 WIFI Module ESP8266 32M Flash USB-TTL Serial CH340G Development Board for Arduino
Amazon.com: Wishiot 2pcs Esp8266 Esp-01 USB Adapter Programmer + 5pcs ESP8266 ESP-01S WiFi Module 4MB Wireless Serial Transceiver : Electronics
ESP8266 IoT Communication Module with Integrated USB - store.ncd.io
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
Transform Your ESP8266 Board into a USB to Serial Board Easily with Arduino Serial Bypass Sketch - CNX Software