Amazon.com: HiLetgo 1pc ESP8266 ESP-12E ESP12E WiFi Wireless Transceiver Wireless WiFi Module Development Board LWIP AP+STA for Arduino : Electronics
ESP8266 ESP-12E WIFI Microcontroller USB Development Board Arduino MicroPython - $5.36 - JacobsParts Inc
ESP-12F Wifi Module, ESP8266, 4MB – ElectroDragon
WiFi module-The Difference Between ESP-12E and ESP-12F
Amazon.com: HiLetgo 1PC ESP8266 NodeMCU CP2102 ESP-12E Development Board Open Source Serial Module Works Great for Arduino IDE/Micropython (Small) : Electronics
ESP8266 ESP-12 WiFi Module
Esp8266 Esp-12e Remote Serial Ports Wifi Module Esp-12e (esp-12f Upgrade) Wireless Transceiver With Adapter Board For Arduino - Integrated Circuits - AliExpress
Suyin Nodemcu Esp8266 Esp-12E Ch340G Wifi Network Development Board For Arduino New - Walmart.com