Full integration of the Mega R3 ATmega2560 microcontroller and the ESP8266 Wi-Fi chip with 32 Megabit flash memory on one board.
A convenient solution for developing new projects that require Arduino and Wi-Fi.
The board has a DIP switch for interconnecting modules
Instruction on detail page pf product: http://robotdyn.com/catalog/boards/uno_wifi_r3_atmega328p_esp8266_usb_ttl_ch340g_micro_usb/

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2.76 inch
Height : 0.39 inch
Length : 3.54 inch

Item Weight: 0.8 ounce (View shipping rates and policies)
Shipping Weight: 0.8 ounce (View shipping rates and policies)

ASIN : B0756HVJTW