Yun Shield iDuino

If you're looking for an Arduino Shield that can connect you to the internet and improve your storage capacity, this item is for you. The Iduino Yun shield, a compelling development for the Arduino board, runs an open-source OpenWrt system (same system as the Arduino Yun). It is fully compatible with Arduino IDE V1.5.4 or later versions. Yun Shield is an ideal choice for Arduino Projects, which requires various internet connections and more storage. It works like an Arduino Yun but is more flexible because it can work along with other Arduino boards, including Arduino UNO, Duemilanove, and Mega. It also uses an external antenna which provides stable connection under various environments. The shield requires 200mA current when in full load, so it is powered by the Arduino VIN pins to avoid overheating in the Arduino onboard 5V LD0.

Features:

Open-source Linux system (OpenWrt) inside
Low power consumption
Compatible with Arduino IDE 1.5.4 or later versions. Users can program, debug or upload a sketch to Arduino board
Managed by Web GUI, SSH via LAN or Wifi
Software upgradeable via network
Support internet connection via LAN port, Wifi or 3G dongle
Support USB flash to provide storage for Arduino projects
The reliable design provides a robust system
Compatible with Arduino Leonardo, Uno, Duemilanove, Diecimila, and Mega