An extremely powerful development for Arduino board, is designed to solve the problems of connection and storage which exist in the Arduino board. Yun Shield runs Open Source OpenWrt System (Same system as runs in Arduino Yun) and it is fully compatible with Arduino IDE V1.5.4 or later versions. Yun Shield is an ideal choice for Arduino Projects which require various internet connections and more storage.
Actually, Yun Shield is equal to the official Arduino Yun, but Yun Shield is more flexible because it can work with other Arduino board such as Uno, Duemilanove, and Mega etc. Yun Shield uses external antenna which provides stable connection under various environments.
The Yun is the core module of Yun Shield. And it requires 200mA current when in full load, so it is powered by the Arduino VIN pins to avoid overheated in the Arduino onboard 5V LD0.
Features:
1.Open source Linux system (OpenWrt) inside
2.Low power consumption
3.Compatible with Arduino IDE 1.5.4 or later versions. Users can program, debug or upload Sketch to Arduino board
4.Managed by Web GUI, SSH via LAN or Wifi
5.Software upgradable via network
6.Support internet connection via LAN port, Wifi or 3G dongle
7.Support USB flash to provide storage for Arduino project.
8.Reliable design provides robust system
9.Compatible with Arduino Leonardo, Uno, Duemilanove, Diecimila and Mega
Hardware Resources
1.Processor: 400MHz, 24 MIPS
2.Flash: 16MB
3.RAM: 64MB
4.Power input: 4.75V~23V via Arduino Vin pin
5.1×10M/100M RJ45
6.Connector 150M Wifi 802.11 b/g/n
7.External antenna via I-Pex
8.1×USB port for USB storage or 3G connection
9.1×Reset button
10.Compatible with 3.3V or 5V I/O Arduino
More info:
http://www.geeetech.com/wiki/index.php/Iduino_Yun_Shield