It’s an Arduino shield that adds a Linux SoC, WiFi, Ethernet, and USB Host to any Arduino board from the Uno, to the Duemilanove and Mega. It is basically identical to the Arduino Yun ...

There are LiPo battery shields available, and although they may work well, recharging requires access to a USB port ... comes from this shield being mounted underneath the Arduino, unlike every ...

Then, an Arduino board might be exactly what you're ... However, additional components -- a Wi-Fi shield and a Bluetooth module -- are required. The R4 WiFi is already equipped with Wi-Fi ...