Arduino YUN
Contents
Description
The Arduino Yún is a microcontroller board based on the ATmega32u4 (datasheet) and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWrt named OpenWrt-Yun. 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 a 3 reset buttons.
The Yún distinguishes itself from other Arduino boards in that it can communicate with the Linux distribution onboard, offering a powerful networked computer with the ease of 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.
NB : In some countries, it is prohibited to sell WiFi enabled devices without government approval. While waiting for proper certification, some local distributors are disabling WiFi functionality. Check with your dealer before purchasing a Yún if you believe you may live in such a country.
Summary
Because the Yún has two processors, the summary section shows the characteristics of each one in two separate tables.
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) |
| 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)
Schematic
Schematic:File:Arduino-Yun-schematic.pdf
How to buy
Click here to buy Arduino Yun
