In this chapter, we understood the difference between pull-up and pull-down resistors to wire pushbuttons and read their status with the mraa
and wiring-x86
libraries. We understood the difference between reading the pushbutton statuses with polling and working with interrupts and interrupt handlers.
We created consistent code that allowed the user to perform the same actions with either pushbuttons in the breadboard or HTTP request. We combined code that reacts to changes in the statuses of the pushbuttons with a RESTful API built with Tornado Web server. As in the previous chapters, we took advantage of Python's object-oriented features and we created classes to encapsulate pushbuttons and the necessary configurations with the mraa
and wiring-x86
libraries. Our code is easy to read and understand and we can easily switch the underlying low-level library.
Now that we were able to read digital inputs in different ways and configurations that made is possible for users to interact with...