Arduino Yún (meaning ‘cloud’ in Chinese) combines the existing Arduino Leonardo, based on Atmel’s ATmega32u4 8-bit microcontroller, with an embedded Atheros AR9331 Wi-Fi system-on-chip (SoC) running Linino, a MIPS GNU/Linux variant of OpenWRT. The principal feature of the new board is a Bridge library, which makes it easy to navigate complex web services that use verbose, RAM-intensive text-based formats such as XML by delegating all network connections and processing of HTTP transactions to the Linux-based SoC.
In common with Arduino Leonardo, the Yún has features such as 14 digital input/output pins, seven pulse width modulation (PWM) channels and 12 analogue inputs. It also incorporates a 16 MHz crystal oscillator and a microUSB connector plus a Standard-A type USB connection and a PoE compatible microSD card socket for additional storage. When the Yún is powered up for the first time it functions as a Wi-Fi access point, creating a Wi-Fi network called ‘Arduino’. The board can then be configured by entering a Wi-Fi network name and password. RS says that the Yún expands the Arduino scenario for anyone wishing to develop interactive objects and environments, and opens up new open-source design opportunities and applications that were previously out of reach using existing Arduino boards.
RS Components; www.rs-components.com