Arduino Yun

From Earlham CS Department
Revision as of 14:10, 29 January 2015 by Ghcrows13 (talk | contribs)
Jump to navigation Jump to search

Arduino Yun

Crash Course


each Yun

  • is numbered
  • has a designated box
  • has a label on it with its number and the last two octets of its IP address (I.E. cs4 130.63 is csyun4 with the IP 159.28.130.63)
    • 159.28 is Earlham's IP address

Resources

[product page]

[getting started]

need sorting ->


Current Yuns

csyun1

  • registered
  • configured
  • 90A2DAF510F8
  • ec2011
  • 159.28.130.243
  • owner: charliep
  • OpenWRT v1.0


csyun2

  • registered? (no internet access)
  • configured?
  • 90A2DAF30034
  • ec2009
  • 159.28.130.242
  • owner: charliep
  • OpenWRT v1.0


csyun3

  • registered
  • configured
  • 90A2DAF210E7
  • ec2012
  • 159.28.130.191
  • owner: charliep
  • OpenWRT v1.0


csyun4

  • registered
  • not configured
  • 90A2DAF031AC
  • ec2016
  • 159.28.130.63
  • owner: charliep
  • OpenWRT v1.0


csyun5

  • registered
  • configured
  • 90A2DAF9035F
  • ec2017
  • 159.28.131.13
  • owner: charliep
  • OpenWRT v1.0


csyun6

  • registered
  • configured
  • 90A2DAF51147
  • ec2024
  • 159.28.131.16
  • owner: charliep
  • OpenWRT v1.0


csyun7

  • not registered
  • not configured
  • 90A2DAF30459
  • owner:
  • OpenWRT v1.0

Details

Package Manager

Uses a package manager called opkg. Very similar to apt-get and yum. Has a healthy selection of software.

Comes preinstalled with

  • python 2.7
  • vim / nano


Boot

  • The Arduino side boots up almost instantaneously.
  • However, the Linux side takes about as long as a PC to boot up.
  • The white light indicates that the wifi is working among other things.


Sketch Upload

  • You can't upload sketches through wifi on ECWireless. It works on normal LANs. What's the cause of this?
  • It seems normal for the USB to lose connection and to immediately reestablish connection. Sometimes the COM port will change after the first sketch upload. If the connection is not reestablished (why?) you can use the "USB stops being recognized" bit below.

Serial

  • Serial talks via the Arduino serial monitor
  • Bridge establishes communication between Arduino and Linux processors
  • Console uses bridge to establish a console (similar to serial) that can be accessed with telent from the Yun's local terminal


troubleshooting

Network

I had trouble getting it on ECWireless. I had to go to ITS and have them register it manually. I configured the Yun to connect to ECWireless and then was able to ssh to it directly. However, I could not upload sketches via wireless.

In addition each time it is rebooted it loses access to wifi. There's a quick solution to that: tapping the 32U4 RST button twice to restart the 32U4 processor and restart the sketch. [described here]

It would be possible to use guest wireless if the Yun told us its IP (due to non-static IP addresses on guest wireless.) It could do that by ssh'ing to a server (using keys) and saving its ifconfig.

It's also possible to bypass ECWireless authentication by having ITS configure the device to have greater permissions.


USB stops being recognized

This fixed my problem: [arduino form]

  1. nano /usr/bin/run-avrdude
  2. Change the efuse value from FB to CB
  3. execute "/usr/bin/run-avrdude /etc/arduino/Caterina-Yun.hex"

Temboo

[Arduino Description of Temboo]

[Temboo Getting Started]