The Arduino Yún Shield extends your Arduino board with the power of a Linux based system that enables advanced network connections and applications. The Linux system is based on the Qualcom Atheros AR9331 System on Chip processor and OpenWrt-Yun, a linux distribution based on OpenWrt. The Shield provides a wired Ethernet port, a Wi-Fi interface and a USB-A port.
The Arduino Yún Shield is supported on all the Arduino boards with R3 Layout: Arduino Uno, Arduino Leonardo, Arduino Mega 2560, Arduino Due, Arduino Zero.
The software created for the Arduino Yún board is compatible with the Arduino Yún Shield, and since it can be matched to a more powerful Arduino board like Arduino Due and Arduino Zero it enables more advanced applications.