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.
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
Package list:
1 x Italy Original Arduino Yún
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