Tag: ros

ROS and sounds or how to make your droid to say the Dalek Exterminate!!!

Audio feedback from your robot

Intro

After our previous post where Bence explained that roboticists should be careful doing scary stuff with their robot, I thought I need to do some with mine to troll ourselves. So why shouldn’t my robot sound like this when it is moving:

 

 

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ROS Indigo with Elementary OS Freya

I’ve recently got my a new laptop for work, which is great, but this means I had to abandon all the comfort of OSX.

Of course for work I need an Ubuntu system but I set my eyes on a distribution called Elementary OS before, that is Ubuntu-based but tries to mimic the style of OSX.

indigoigloo_600

To begin the ROS installation a minor tweak is needed on the first step. Instead of

sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'

use

sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu trusty main" > /etc/apt/sources.list.d/ros-latest.list'

Since ROS doesn’t have packages dedicated to Elementary, this second line tells it to use the Ubuntu Trusty packages instead (on which Elementary OS Freya is based).

However, when I tried to start up the simulation of TIAGo, I got buckets of errors from rosdep about the operating system not being detected. After a quick sneak peak at the code of it, I discovered that there is an environmental variable that can be used to override whatever is happening, as rosdep is supposed to support Elementary OS, it’s the latter that does something fishy here.

I added

export ROS_OS_OVERRIDE=elementary

to my .bashrc, and the problem was solved.

Here is a video of the working system, with the TIAGo robot from PAL Robotics.

So those are my notes on the Elementary OS + ROS topic. For those who’d like to get started with Elementary OS check the links below.

 

Elementary OS goodies to install,

20 things to do after installing Elementary OS

Do you like Evernote‘s desktop client? NixNote2 provides a fully cross-platform opensource alternative to the official client.

To see if and where your boot process can be optimized, try bootcharting

To see what you can do with your Thinkpad fans and in Linux go here.

ROS on BeagleBone with Debian

If it comes to complex robotics software I’m always looking for ROS. I wanted to be able to use it on my BeagleBone but Ubuntu was not satisfying so I though of keeping Angstrom since it is the ‘official’ distribution of the board but I had trouble with installing ROS onto it. The final solution was to install Debian Squeeze on the BeagleBone so ROS can go on the top of this. The importance of Debian is that it supports all hardware interfacing features Angstrom does (PWM, GPIO, Analog). First I tried Fuerte but there were some problems and I don’t really need any fancy stuff yet so I went back to Electric. (more…)