Kivy is a Python-based open-source library for writing GUI applications, for touch-screen based systems. Kivy supports both desktop environments and mobile operating systems like Android and iOS. In our previous article, we talked about porting Kivy to Yocto, on the Colibri T-20. In this article, we demonstrate what Kivy features make it suitable for building UI for handhelds, with the case study of a barcode based asset tracker.

pySerial is a Python API module to access the serial port. pySerial provides a uniform API across multiple operating systems, including Windows, Linux, and BSD. This article explains how to use the pySerial API to access a serial port.

The MVC design pattern was conceived in 1979 at Xerox, and since then many variants have evolved. All web frameworks, today, support some variant of the MVC pattern. But the MVC pattern has been largely ignored in GUI application development. This article describes one variant of the MVC pattern and how it can be used in GUI application development.