Grzegorz Kukla

Learn how to create an app in Spring Boot for the Raspberry Pi 3, connecting to the AWS IoT cloud to control a lightbulb and take an advantage of the Device Shadow service.

Two years ago, I created my first IoT project for home. It was a smartphone-driven remote control for a gas boiler. The app made it possible also to control temperature at home. Today, I’d like to show you how to use the IoT service in the AWS (Amazon Web Services) cloud to connect to many appliances at home in a much easier way.

I’ll begin by stating an obvious and yet fundamental fact for every programmer: each newly created program should be tested; regardless whether it’s an in-company program or a project for a client. But how to do the testing?

There are few more problematic notions in the web development and programming language communities than the unruly two: Java and JavaScript. Due to the coincidence of names and the partially similar usage of these two programming languages, many people regularly mistake one for the other, using these names interchangeably

Several months ago, my adventure with creating mobile apps for Android began. Today, I’d like to tell you about the difference between .class files in Java and .dex files in Android. I’ll also show you how to create a .dex file containing a Java class step by step.