Features : - Full integration on one board: Mega R3 ATmega2560 and WiFi ESP8266 with memory 32Mb (megabyte) - All of the modules can work together or each separately. And everyone has their own pinout headers - The convenient solution for the development of new projects requiring Uno and WiFi - Via USB you can update sketches and firmvare for ATmega2560 and for ESP8266. For this on board have the USB-serial converter CH340G - Use this board is very simple - The board has DIP-switch, to connect the modules - For example, to: USB and ATmeg2560, USB and ESP8266, ATmega2560 and ESP8266