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Tutorial: Ros Demo
The ROS workspace to run ECG demos. This is basically a wrapper GIT repository to collect all required repositories as submodules for running the ECG workbench demos. All code is supposed to run under ROS indigo and tested with Ubuntu 14.04. Everything is tested with Python 2.7.6 only, Python 3.X will probably not work.
You'll need to follow everything starting from this high-level repository: https://github.com/icsi-berkeley/ros_catkin_ecg_ws
NOTE: This tutorial is geared towards a standalone network of repositories using git submodules, to allow easy integration of a language understanding system for ROS researchers. If you've already done the rest of the tutorials and have ecg_framework_code, etc. installed, you can add a symbolic link (Symlink) to your existing installation).
The system requirements to run the NLU/ECG system include everything from the framework-code, found here.
The installation notes are based on the following tutorial for DARwin-OP: http://www.generationrobots.com/en/content/83-carry-out-simulations-and-make-your-darwin-op-walk-with-gazebo-and-ros
Install ROS indigo, as well as the prerequisites for the gazebo_darwin packages and do:
sudo apt-get install git ros-indigo-desktop-full ros-indigo-gazebo-plugins ros-indigo-gazebo-ros ros-indigo-gazebo-ros-control ros-indigo-hector-gazebo ros-indigo-hector-gazebo-plugins ros-indigo-effort-controllers ros-indigo-joint-state-controller ros-indigo-joint-state-publisher ros-indigo-turtlebot-teleop ros-indigo-catkin
To get ROS running, you need to source the setup.bash. We recommend to have that done automatically in .bashrc. Do the following:
echo "source /opt/ros/indigo/setup.bash" >> .bashrc
source ~/.bashrc
Then clone this git repository. Its root folder is a new catkin workspace, which we assume to be ~/ros_catkin_ecg_ws. You'll execute most other commands in these instructions from there.
git clone https://github.com/icsi-berkeley/ros_catkin_ecg_ws.git ~/ros_catkin_ecg_wc
Next, you need to initialize and update the submodules within this repository. The submodules contain the ROS code for the darwin robot and the ECG workbench. Cd into ~/ros_catkin_ecg_ws and do the following:
cd ~/ros_catkin_ecg_ws
git submodule update --init --recursive
NOTE: If you've already installed the ecg_interface system elsewhere on your computer, you can just add a Symlink to this path.
Now you need to build the workspace. Do this by
cd ~/ros_catkin_ecg_ws
catkin_make
catkin_make install
Next you need to source come setup file. We recommend to do this automatically by doing that in your .bashrc.
echo "source ~/ros_catkin_ecg_ws/devel/setup.bash" >> ~/.bashrc
source ~/.bashrc
Next we setup the ECG NLU system. Make sure you've installed all the packages listed here.
You also have to install a python module called ipaddress using pip:
sudo pip install ipaddress
Next, you have to set the PYTHON for the ECG framework code. Add the following to your .bashrc:
export PYTHONPATH=~/ros_catkin_ecg_ws/src/ros_ecgworkbench/src/ecg/ecg_interface/ecg_robot_code/src/main:~/ros_catkin_ecg_ws/src/ros_ecgworkbench/src/ecg/ecg_interface/ecg_framework_code/src/main:$PYTHONPATH
Source it again:
source ~/.bashrc
You can test if the transport installation worked by opening two terminals, and in the first do:
python ~/ros_catkin_ecg_ws/src/ros_ecgworkbench/src/ecg/ecg_interface/ecg_framework_code/src/tests/transport_test.py chat1 chat2
In the second do:
python ~/ros_catkin_ecg_ws/src/ros_ecgworkbench/src/ecg/ecg_interface/ecg_framework_code/src/tests/transport_test.py chat2 chat1
Now, if you enter text in one terminal, it should show up in the other terminal, too.
Before starting gazebo the first time, I recommend downloading all 3d models for gazebo, since this speeds up the starting processes. To do so, execute the script (takes ~5 minutes, depending on your internet connection):
./download_gazebo_models.sh
You can now start gazebo, which should bring up an indoor environment that we use for our experiments:
roslaunch ros_cqi run_gazebo_darwin_kitchen.launch
roslaunch ros_cqi spawn_darwin.launch
Now press the "play" button at the lower left of the simulator window.
To have the robot walking, execute the test walking script that comes with darwin. I recommend to have a look at that script to see how the walking behaviour is executed. You can find it uner src/darwin_gazebo/src/.
rosrun darwin_gazebo walker_demo.py
Alternatively run the pickup pen scenario from the paper:
rosrun ros_cqi run_interface.py
To get started with our system, you'll want to start the CQI. Do so by entering:
rosrun ros_cqi run_interface.py
Take a look at all files under the folder src/ros_cqi to understand how it works.
To run the NLU system, do the following (unfortunately, you have to start the script from the scripts-folder, due to some path problems that we have not resolved so far...):
cd ros_catkin_ecg_ws/src/ros_ecgworkbench/scripts/
rosrun ros_ecgworkbench run_nlu.py
Now, enter the following in the text input console which should have come up, to move the robot to coordinates 1 1:
Robot1, move to location 1 1!
An error may show up in the window, but the robot will move. This is to be fixed in the future...
If there are problems with gazebo, especially the downloading of the world models, try the following before starting it:
export LC_NUMERIC=C
Gazebo comes with its own sdf model database. However, we'll probably want to also have our own 3d models. Therefore we need to provide an additional model database. Details on how this can be done can be found here: