Rapyuta

Install Rapyuta

* Download the cloud side code and extract the code:

tar xzvf barcode_cloud.tar.gz

Edit your .rce/config.ini file to add barcode_cloud to packages list:

vim ~/.rce/config.ini
...
[machine/packages]
barcode=<absolute path to barcode_cloud>
...

chroot into container rootfs:

sudo rce-make

Install python packages:

sudo apt-get install python-zbar python-imaging
sudo easy_install google_api_python_client

Build ROS Package:

rosmake barcode_cloud

Exit chroot:

exit

Download client side code and extract the code:

tar xzvf barcode_client.tar.gz

Add Barcode client-side code to ROS_PACKAGE_PATH:

echo "export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:<path to barcode_client>" >> ~/.bashrc

Source bashrc (Only needed if you are using the same terminal):

source ~/.bashrc

Build ROS package:

rosmake barcode_client

Description: Using a barcode-extractor node to extract the barcode from a barcode image.

Provided: barcode-extractor node in Rapyuta, ROS client with configuration file.

Goal: Learn how to setup a computing environment, launch ROS nodes, and access topics and services of the launched nodes inside the computing environments of Rapyuta.

Study config_files/barcode.cfg file in barcode_client package to understand how elements are connected.

To test this task, start the cloud engine (master, robot, container, and roscore processes)

Now run the ros client (Don't forget to update the IP in your config file):

rce-ros <path to barcode_client/config_files/barcode.cfg>

Test the Extractor:

(Assuming you are at the barcode_client top folder)
python barcode_client/scripts/servicescanner.py barcode_client/images/imageXX.jpg
(Fill XX with any number from 01-10)

You should see the barcode number returned.

Description: Use the extracted barcode to query Google API for product information

Provided: barcode-extractor node in Rapyuta, ROS client with configuration file, Google API query tool

Goal: Learn how to connect to other computing environments of Rapyuta and access their services and topics.

To run this task you will need a Google API key. Go here for that. If you don't already have a project for Google APIs, you will be asked to create one.

Once you reach the Services page, switch on Search API for Shopping.

Now, Click on the API Access link on the sidebar and copy your API key under the “Simple API Access” heading.

Copy the googleapi.cfg.default file in barcode_cloud/barcode_cloud folder and rename it to googleapi.cfg.

Add your API key to the file googleapi.cfg.

Study config_files/barcode_webdb.cfg file in barcode_client package to understand how elements are connected.

To test this task, start the cloud engine (master, robot, container, and roscore processes)

Now run the ros client (Don't forget to update the IP in your config file):

rce-ros <path to barcode_client/config_files/barcode_webdb.cfg>

Test the Extractor:

(Assuming you are barcode_client top folder)
python barcode_client/scripts/topicscanner.py barcode_client/images/imageXX.jpg
(Fill XX with any number from 01-10)

You should see Product Name returned.

This client won't exit after displaying the text and you should Ctrl+C to exit.