Revision as of 01:26, 30 July 2016

Introduction

OverView

Iduino Yun is a ideal IoT device for Internet of Things projetcs. It is a compatible / replacement product for Arduino Yun. It works with Arduino IDE with version higher than 1.5.4.

The Iduino Yun is a microcontroller board based on the ATmega32u4 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 Iduino Yun is similar to the Arduino Leonardo in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Yun 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 Arduino 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 Arduino to interface with those peripherals.

Features

• Open source Linux (OpenWrt) onboard
• Compatible with Arduino IDE 1.5.4 or later, user can program, debug or upload sketches to the Arduino board via the Arduino IDE.
• Managed by Web GUI, SSH via LAN or WiFi
• Software upgradable via network
• Built-in web server
• Supports internet connection via LAN port, WiFi or 3G dongle.
• Supports USB flash to provide storage for Arduino projects.
• Failsafe design provides robust system.

Specifications

AVR Arduino microcontroller

• Microcontroller ATmega32U4
• Operating Voltage 5V
• Input Voltage 5
• Digital I/O Pins 20
• PWM Channels 7
• Analog Input Pins 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
• Card Reader Micro-SD only
• RAM 64 MB DDR2
• Flash Memory 16 MB

WiFi Specification

• WiFi: Support 150M 2.4Ghz WiFi, 802.11 b/g/n
• Frequency range: 2.4~2.4835GHz
• Modulation: BPSK, QPSK, CCK and OFDM (BPSK/QPSK/16-QAM/ 64-QAM)
• Sensitivity @PER: 135M : -65dBm@10%PER; 65M : -65dBm@10%PER; 54M : -68dBm@10%PER;

11M : -84dBm@8% PER; 6M : -88dBm@10% PER; 1M : -90dBm@8% PER

• Typical Distance: Indoor: 60m (max); Outdoor 150m (max) (with 2 dBi antenna)
• RF Power: 11n: 13dBm; 11g: 13-15dBm, 11b: 16-18dBm,
• Connector: I-PEX connector.

Quick Start of Iduino Yun

This chapter shows how to run the first sketch of Iduino Yun.

Connect to Iduino Yun

Power on Iduino Yun, after the system runs, it will generate a WiFi network with SSID : I duino-A84041XXXXXX.

Iduino Yun Generate an unsecure WiFi network

Use your PC to connect to this unsecure WiFi netowrk. Your PC will get DHCP from Yun. Your PC will get an IP 192.168.240.x and the Iduino Yun will have the IP 192.168.240.1

Open Arduino IDE and configure right Profile

Open Arduino IDE and choose the profile Tools --> Boards --> Arduino Yun. Choose the ports to "Iduino at 192.168.240.1"

Choose Yun profile

Upload Bridge example

This example for the Arduino Yun shows how to use the Bridge library to access the digital and analog pins on the board through REST calls. It demonstrates how you can create your own API when using REST style calls through the browser.

Possible commands created in this shetch:

 "YUNs_IP/arduino/digital/13"     -> digitalRead(13)
 "YUNs_IP/arduino/digital/13/1"   -> digitalWrite(13, HIGH)
 "YUNs_IP/arduino/analog/2/123"   -> analogWrite(2, 123)
 "YUNs_IP/arduino/analog/2"       -> analogRead(2)
 "YUNs_IP/arduino/mode/13/input"  -> pinMode(13, INPUT)
 "YUNs_IP/arduino/mode/13/output" -> pinMode(13, OUTPUT)

In Arduino IDE, Select example File-->Examples-->Bridge-->Bridge . Click Upload , Arduino IDE will compile this example and upload to Yun. During the upload, Arduino IDE will pop up a window for asking the password. type password iduino here. and continue upload.

upload sketch to Yun

Test the sketch

After upload, user can open the web broswer and use it to Read/Write the I/Os of Yun.

type password for Bridge sketch

Notice: Yun will ask for password at the first connect via Web. The user name is root and password is iduino.

more info about this sketch please refer this link: Explain of Bridge Example

User Manual

This chapter introduce more detail for the use of Iduino Yun. Iduino Yun is compatible/replacement of Arduino Yun, user can also see the Arduino Yun manual for reference.

Getting IP address

There is a Wifi interface a LAN port on the Iduino Yun. And they both have an IP address for network connecting and device management.

Factory IP of Wifi port

At the first boot of Iduino Yun, an unsecure Wifi network called Iduino-xxxxxx will automatically generate. Users can use their laptop to connect to this Wifi network and the laptop will get an IP 192.168.240.xxx. The default IP of Iduino_Yun_Shield is 192.168.240.1.

FallBack IP

The LAN port of Iduino_Yun_Shield distributes a Fall Back IP

172.31.255.254/255.255.255.252

If the user’s laptop IP is

172.31.255.253/255.255.255.252

Then you can access Yun Shield by Fall Back IP.

Detect IP from Arduino IDE

If the Ethernet port of Iduino Yun is connected to Uplink Router or Wifi Router, the PC in the same network can use Arduino IDE to detect the IP of Iduino Yun.

Access Method

The Iduino Yun Shield runs Open Source Linux System. If you have a PC which is in the same network with Iduino Yun, you can access its system by Web or Secure Shell (SSH).

Webpage access

Use browser (recommend Firefox or Chrome) to set Iduino Yun, and you will see login page after entering 192.168.240.1.

Default password for Iduino Yun is ‘iduino’.

SSH Access

By SSH Access, users can enter Linux system directory and customize more functions as well as applications.

SSH Access:

IP address: IP address of Iduino_Yun_Shield

Port: 22

User Name: root

Password: iduino (default)

Webpage Setting

General setting

After login, the GUI will show the WIFI/ETH status.

Click the SYSTEM button, and you can set the device password and parameter.

Upgrade

You can repair bug, upgrade system, and add new function by upgrading Iduino Yun firmware through GUI. Turn to page of GUI→Upgrade and choose correct firmware. The firmware used for webpage upgrade should be Sysupgrade Type, and you can decide to save setting or not after upgrade.

Usually, it takes 2 minutes to upgrade firmware. The Iduino Yun will restart automatically and all the LEDs will blink together.

FAQ

Reference

• Arduino Yun Bridge Official page

• Arduino Yun Official Forum