The Arduino Yun allows for remote data transfer via any TCP/IP network including the remote uploading of sketches ! The Yun integrates Arduino sketches with the power of Linux via its on board, OpenWRT based Linux distribution to bring the power of cloud APIs to your Arduino sketch. Now you can integrate to web services such as drop box or twitter or provide a service for remote query.
The Ardunio Yun has onboard wifi and power-over-Ethernet connection you can send sensor data and received instructions via the internet. The device is configured by a on-board web interface which allows for the uploading of sketches and configuration of the wifi and Ethernet settings to connect to the correct network.
The board two controllers the, Atheros AR9331 and the ATmega32u4 microelectronic allow for Arduino sketches to issue commands to the Linux based distribution for connecting to web services and servers and processing of api calls. You are no longer constrained by the Arduino constrained memory environment.
Besides the built-in Ethernet and WiFi support, the Yun has a USB-A port, micro-SD card slot, 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analogue inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and a 3 reset buttons.
|AVR Arduino microcontroller|
|Digital I/O Pins||20|
|Analog Input Channels||12|
|DC Current per I/O Pin||40 mA|
|DC Current for 3.3V Pin||50 mA|
|Flash Memory||32 KB (4 KB for bootloader)|
|Clock Speed||16 MHz|
|Ethernet||IEEE 802.3 10/100Mbit/s|
|USB Type-A||2.0 Host|
|Card Reader||Micro-SD only|
|RAM||64 MB DDR2|
|Flash Memory||16 MB|
|PoE compatible 802.3af card support|