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Item specifics
  • Brand Name: DFRobot
  • Application: for Open Source IoT
Product Description

New Original Yún microcontroller board for Arduino, two processors (Atmega32U4 + Atheros AR9331) integrated Ethernetn and WiFi support, micro-SD card slot, ICSP header etc. for Open Source IoT

  • The Yún is a newcomer microcontroller board in the boards family. It is a microcontroller board based on the ATmega32u4 (datasheet) and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWRT named Linino. The board has built-in Ethernet and WiFi support, 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 analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and 3 reset buttons.
  • The Yún distinguishes itself from other boards for arduino in that it can communicate with the Linux distribution onboard, offering a powerful networked computer with the ease of Shield for Arduino. In addition to Linux commands like cURL, you can write your own shell and python scripts for robust interactions.
  • The Yún is similar to the Leonardo in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Yún to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.
  • The Bridge library facilitates communication between the two processors, giving sketches the ability to run shell scripts, communicate with network interfaces, and receive information from the AR9331 processor. The USB host, network interfaces and SD card are not connected to the 32U4, but the AR9331, and the Bridge library also enables the board for Arduino to interface with those peripherals.




Because the Yún has two processors, the specification section shows the characteristics of each one in two separate tables.
  • AVR Ar-dulno 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)
    • SRAM 2.5 KB
    • EEPROM 1 KB
    • 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
  • RAM 64 MB DDR2
  • Flash Memory 16 MB
  • PoE compatible 802.3af card support (see the note below)
Shipping List
  • Yún microcontroller board for Arduino x1

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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.18kg (0.40lb.)
  • Package Size: 15cm x 12cm x 6cm (5.91in x 4.72in x 2.36in)
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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.18kg (0.40lb.)
  • Package Size: 15cm x 12cm x 6cm (5.91in x 4.72in x 2.36in)
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