ESP8266 Pinout | Pins and Their Functions of ESP8266 SoC - Electronics Hub
ESP8266 Pinout, Datasheet, Features & Applications - The Engineering Projects
Amazon.com: D1 Mini ESP8266 ESP-12 ESP-12F CH340G V2 USB WeMos WiFi Development Board NodeMCU Lua IOT Board 3.3V with Pins (D1 Mini CH340) : Electronics
esp8266_gpio_pin_allocations [ESP8266 Support WIKI]