Learn Robotics Programming

Visual processing with behaviors

Our image service works, but has a major flaw. If we want our robot to be doing something, even when the network is not perfect, we need to be able to run a behavior in parallel with this. That behavior needs access to the image data, as well as the server too.

We will approach this by making the Flask web app a secondary process, with the behavior as the primary process for the robot when it is running. Python has a handy tool for exactly this kind of structure, called multiprocessing. Find out more at https://docs.python.org/2/library/multiprocessing.html.

Communicating between multiple processes is tricky. If two processes try to access (read or write) the same data at the same time, the results can be ...