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Arduino YUN - With onboard WiFi (Rev 1)

by Arduino
SKU 1248
Sold out
£66.30 inc VAT
£55.25 ex VAT

This product has been replaced by the Arduino Yún Rev 2.

RETIRED PRODUCT - We've stopped stocking this product or it has been retired by the manufacturer and is no longer for sale. This page remains available for its resources and as a source of potential interest.

The Arduino Yun is a microcontroller board based on the ATmega32u4 and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWrt named Linino OS. The board has built-in Ethernet and WiFi support, a USB-A port, micro-SD card slot, 20 digital input/output pins (7 of them can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and 3 reset buttons.

The YUN distinguishes itself from other Arduino boards by its ability to communicate with the Linux distribution onboard, offering a powerful networked computer with the ease of an Arduino. In addition to Linux commands like the cURL, you can write your own shell and python scripts for robust interactions. The YUN is similar to the Leonardo with the ATmega32u4, except that it has Linux on board. (has built-in USB communication, eliminating the need for a secondary processor).

The Linino OS installation occupies around 9 MB of the 16 MB available of the internal flash memory. You can use a micro SD card if you need more disk space for installing applications.

The YUN has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers. The ATmega32U4 provides a dedicated UART TTL (5V) serial communication. The 32U4 also allows for serial (CDC) communication over USB and appears as a virtual com port to software on the computer. The chip also acts as a full speed USB 2.0 device, using standard USB COM drivers. The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the Arduino board. The RX and TX LEDs on the board will flash when data is being transmitted via the USB connection to the computer.

The YUN appears as a generic keyboard and mous, and can be programmed to control these input devices using the Keyboard and Mouse classes. The onboard Ethernet and WiFi interfaces are exposed directly to the AR9 331 processor. To send and receive data through them, use the Bridge library. The YUN also has USB host capabilities through Linino OS. You can connect peripherals like USB flash devices for additional storage, keyboards, or webcams. You may need to download and install additional software for these devices to work.

Note: This Rev 1 version is without PoE.

Note: Yun Release 5. The new Arduino Yun R5 differs substantially from the previous release in these features; The power supply system provides 5V on AREF; The layout has been modified, adding two holes for USB signals and two holes for GP6 and GPIO13(LED2).

  • 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)
  • SRAM: 2.5 KB
  • EEPROM: 1 KB
  • Clock Speed: 16 MHz
  • Processor: Atheros AR9331
  • Architecture: MIPS @400MHz
  • Ethernet: IEEE 802.3 10/100Mbit/s
  • WiFi: IEEE 802.11b/g/n
  • USB Type-A: 2.0 Host
  • Card Reader: Micro-SD only
  • RAM: 64 MB DDR2
  • Flash Memory: 16 MB
  • Length: 73 mm
  • Width: 53 mm
  • PoE compatible 802.3af card support