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Thread: Learning ROS ++

  1. #11
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    Re: Learning ROS ++

    Thanks for your input jwatte and Kurt!
    Sounds like I should be good then.

    My XU4 came with Ubuntu 15.04 so I'm going to replace it with the 14.04.1 20150212 image. I assume that is the correct one for making ROS work properly.
    Kåre Halvorsen aka Zenta
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  2. #12

    Re: Learning ROS ++

    As I am running Ros Indigo and not Jade, I am running off of the 14.04.1, latest image, I then do all of the stuff to update it to the latest stuff:

    sudo apt-get update
    sudo apt-get upgrade
    sudo apt-get dist-upgrade

    I then run the odroid utility:
    sudo odroid-utility.sh

    And in there I update all of the kernel components. (I also on the first boot also use this utility to setup to use the whole space on the emmc.

    I have also followed many of the steps for building up my ROS image as murrman did in the posting: http://forum.odroid.com/viewtopic.php?f=95&t=7446

    In particular I am using the older version of ROS indigo that he uses here and not the more up to date version that listed as the official version up at: http://wiki.ros.org/indigo/Installation/UbuntuARM As I have found that some components like Robot Publisher faults on startup in the official repos...

    From the Odroid Ros Image by murrman, building some of the other components from sources can take quite a bit of time and can eat more memory than you have, so I typically setup a swap area for my Odroid. To do this I use the quick method that is shown in: https://www.digitalocean.com/communi...n-ubuntu-14-04

    Good Luck!

    Kurt

  3. #13
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    Re: Learning ROS ++

    Thanks for the guidance Kurt. This evening didn't go so well. It looks like I need to get a proper microSD USB adapter first.. I think I've one at work that might work.
    Last edited by Zenta; 09-06-2015 at 05:26 PM. Reason: Typo on phone..
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  4. #14
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    Re: What DC-DC converter do you use for Odroid?

    Quote Originally Posted by Zenta View Post
    I'm a bit unsure what DC-DC converter I should use. So far I've tried the Turnigy 8A UBEC. I'm a bit worried about the 5,17 - 5,2v output though. I posted a Q about it on the Odroid forum and the answer I got was that it should probably be OK.

    I'm a bit irritated about the voltage output isn't stable 5.0v though. What I recall reading from this forum some of you are using the Pololu 5V, 5A Step-Down Voltage Regulator D24V50F5? from this post on the Odroid forum it looks like the Pololu 5V, 9A Step-Down Voltage Regulator D24V90F5 might be a better solution?

    The thread starter ended up with a rather low-cost converter. I feel that one is a bit large when it comes to size and weight..

    My main question of this post is, what DC-DC converter are you using and what are the voltage readings?, and other suggestions are welcome.
    With the XU3 on ROSie I've been using the 5V 5A step down regulator from Pololu with no problems https://www.pololu.com/product/2851

    The voltage reading was about 4.95V.
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