Printing numbers in LEDs with a RESTful API
Tornado is a Python web framework and asynchronous networking library. It is well known for providing great scalability due to its non-blocking network I/O. We will take advantage of the fact that Tornado makes it really easy to build a RESTful API and make it possible for any client to consume this API and print numbers in LEDs connected to the board. The following is the web page for the Tornado web server: http://www.tornadoweb.org.
In Chapter 1, Understanding and Setting up the Base IoT Hardware, we installed the pip installer to easily install additional Python 2.7.3 packages in the Yocto Linux that we are running on the board. Now, we will use a pip installer to install Tornado 4.3. We just need to run the following command in the SSH terminal to install the package.
pip install tornado
The last lines for the output will indicate that the tornado package has been successfully installed. Don't worry about the error messages related to building...
