WeMos D1 ESP-12E ESP8266 Wi-Fi Shield for Arduino

Arduino Tutorial: First look at the WeMos D1 Arduino compatible ESP8266 Wifi Board from Banggood.com

Open Tools→Board:xxx→Boards Manager and install esp8266 by ESP8266. Install for Arduino 1.6.7 from the for Arduino website. How to get started in for

ESP-12E/F/Mini WeMos D1 WiFi uno based ESP8266 shield for arduino NODEMCU 4mb

ESP8266 WIFI Shield

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WeMos D1 Mini ESP8266 Arduino WiFi Board — Maker Portal