Arduino uno wifi atmega328 with integrated esp8266 wifi module arduino a000133 this board is a version of the outstanding arduino b uno b development board with the addition of integrated b wi fi b the uno is based around the b atmega328 b mcu and mounts the b esp8266 b 802 11 b g n 2 4ghz wi fi module designed for both beginners and advanced users this board is ideal for those starting out with arduino or the b iot b br br the esp8266 wi fi module is a self contained soc