Cloudy Arduino Yún starts connecting

We first wrote about it back in May – Arduino goes wireless with Linux – but the Arduino Yún is now available (since September 10).


It runs a lightweight Linux distro, and also combines WiFi and Ethernet connections on board for communicating with networks out of the box. Why? The Arduino people write:

Yún means “cloud” in chinese language, as the purpose of this board to make it simple to connect to complex web services directly from Arduino.

Basically, it has the same footprint as an Arduino Uno but there’s an ATmega32U4 microcontroller (the same as the Leonardo) and also a Linux system based on the Atheros AR9331 chipset.

To program the Yún, you’ll need to download the Arduino software, and select “Arduino Yún from the “Tools > Board” menu (according to the microcontroller on your board). Tutorials can be found online.

Tech Spec

Because the Yún has two processors, the summary below shows the characteristics of each one separately.

AVR Arduino microcontroller
Microcontroller ATmega32u4
Operating Voltage 5V
Input Voltage 5V
Digital I/O Pins 20
PWM Channels 7
Analog Input Channels 12
DC Current per I/O Pin 40 mA
DC Current for 3.3V Pin 50 mA
Flash Memory 32 KB (of which 4 KB used by bootloader)
Clock Speed 16 MHz
Linux microprocessor
Processor Atheros AR9331
Architecture MIPS @400MHz
Operating Voltage 3.3V
Ethernet IEEE 802.3 10/100Mbit/s
WiFi IEEE 802.11b/g/n
USB Type-A 2.0 Host/Device
Card Reader Micro-SD only
Flash Memory 16 MB
PoE compatible 802.3af card support

See full details about the Yun on the Arduino website »

View the Yun schematic »

The Yún is actually meant to be the first member of a series of Wi-Fi products combining Arduino with Linux. We await its successors.

See alsoWheel in the Arduino Robot – two wheels, two boards, two processors

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