Arduino Yun- A New Arduino Microcontroller Board
The Arduino Yun combines an ATmega32u4 microcontroller with an Atheros AR9331 Linux processor on a single board. The AR9331 runs a Linux distribution based on OpenWrt (Linino), giving you the power of a networked Linux computer alongside the simplicity of Arduino. The two processors communicate via the Bridge library, enabling Arduino sketches to run shell scripts, access network interfaces, and interact with USB and SD card peripherals.
The board features built-in Ethernet and Wi-Fi, a USB-A host port, micro-SD card slot, and 20 digital I/O pins. Like the Leonardo, the ATmega32u4 has built-in USB communication, allowing the Yun to appear as a mouse, keyboard, or virtual serial port to a connected computer.
Key Features
- Dual Processor – ATmega32u4 (Arduino) + Atheros AR9331 (Linux)
- Built-In Wi-Fi – IEEE 802.11 b/g/n wireless networking
- Built-In Ethernet – IEEE 802.3 10/100 Mbps
- Bridge Library – Seamless communication between Arduino and Linux processors
- USB-A Host Port – Connect USB peripherals directly
- Micro-SD Slot – Expandable storage for the Linux side
- 20 Digital I/O Pins – 7 PWM outputs, 12 analogue inputs
AVR Microcontroller Specifications
- MCU – ATmega32u4
- Operating Voltage – 5 V
- Clock Speed – 16 MHz
- Flash Memory – 32 KB (4 KB used by bootloader)
- SRAM – 2.5 KB
- EEPROM – 1 KB
- DC Current per I/O Pin – 40 mA
Linux Processor Specifications
- Processor – Atheros AR9331, MIPS @ 400 MHz
- Operating Voltage – 3.3 V
- RAM – 64 MB DDR2
- Flash Memory – 16 MB
- Ethernet – IEEE 802.3 10/100 Mbps
- Wi-Fi – IEEE 802.11 b/g/n
- USB – Type-A 2.0 Host/Device
- Card Reader – Micro-SD
- PoE – 802.3af compatible (with optional PoE card)
Package Contents
- 1× Arduino Yun
Resources
The Arduino Yun- A New Arduino Microcontroller Board appears in the following collections:
