NodeMCU Lua ESP8266 ESP-12 WeMos D1 Mini WIFI 4M Bytes Development Board Module
Open Tools→Board:xxx→Boards Manager and install esp8266 by ESP8266. This is a D1 mini, it is a mini WIFI board based on the ESP-8266EX. 1 analog input (3.3V max input). Ending Soon. Start Arduino and open Preferences window.