The Arduino Uno Wi-Fi is the new Arduino Uno with an integrated Wi-Fi module! The board is based on the ATmega328P (datasheet) with an ESP8266 Wi-Fi Module integrated (datasheet).
It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started.
The ESP8266 Wi-Fi Module system-on-chip (SoC) with integrated TCP/IP protocol stack
Supports OTA (over-the-air) programming, either for transfer of Arduino sketches or Wi-Fi firmware
The board is based on the ATmega328P with an integrated ESP8266 Wi-Fi Module
14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs
16 MHz Operation
1x Arduino Uno Wifi