WEMOS D1 ESP-12E WIFI ARDUINO UNO BASED ESP8266 BOARD WEMOS D1 is an Arduino Uno-like wifi board based on ESP-8266EX. 11 digital input/output pins1 analog input(3.3V max input)a Micro USB connectiona power jack, 9-24V power input. Compatible withArduinoMore Information : http://www•wemos•cc/d1/Getting_Started