+ WIFi D1 R2 is an integrated ESP8266 based WiFi enabled microprocessor unit + 32Mb flash memory on a Arduino-UNO pinout. + That means the board looks and works (in most cases) like an UNO. + Apparently several shields, sensors and output devices that are manufactured for the Arduin0 platform will work on the WIFi D1 R2 with the added advantage of builtin WiFi. + WIFi D1 R2 board using the Arduino IDE. + For connect to PC need install driver for CH340G. + On board have embedded WiFI antenna and socket for connecting external antenna.