embedded

Blink a LED on Raspberry Pi with Vaadin

Thanks to Vaadin, you can get a fully running application with a few clicks. And Adding GPIO-interaction is easy with the Pi4J library.

Controlling Electronics with JBang on the Raspberry Pi

JBang is a great way to create your first program to control electronic components connected to the Raspberry Pi’s GPIO pins.

Installing Java with SDKMAN on Raspberry Pi

Java on Raspberry Pi has always been possible, but SDKMAN makes the getting-started process a lot easier.

Template to Get Started with Pi4J and JavaFX on Raspberry Pi

How to use the same architecture to implement a JavaFX-based GUI, a PUI attached to a Raspberry Pi, and integrate both in a clean, modular way.

MQTT on Raspberry Pi (Part 3): Sending sensor data from Raspberry Pi Pico to HiveMQ Cloud

Let’s learn about adding some more data to our messaging system with another member of the Raspberry Pi family: the Pico.

Java Modules in the Pi4J Project?

Java modules have been a big discussion point before in many places. And this is now also causing some headaches in the Pi4J project…

MQTT on Raspberry Pi (Part 2): Using MQTT and Raspberry Pi to Visualize Sensor Data on a TilesFX Dashboard

In the 2nd part of the series, learn how to use MQTT and the Raspberry Pi to visualize sensor data on a TilesFX dashboard!

MQTT on Raspberry Pi (Part 1): Send Sensor Data to HiveMQ Cloud with Java and Pi4J

Publish the data of up to 100 devices to an always-on, maintenance-free message broker for free!

Pi4J V.2 Released!

The Pi4J Project was started in 2012 by Robert Savage, the same year the Raspberry Pi was introduced.

After long rework, the Pi4J library (a friendly object-oriented I/O API and implementation libraries for Java Programmers to access the full I/O capabilities of the Raspberry Pi platform) has taken a big step with the first release of the V.2.

Controlling an LCD Display with Spring and Thymeleaf on the Raspberry Pi

Igor De Souza shares on his blog a lot fun and inspirational experiments with Java on Raspberry Pi. Some of those were already shared here on Foojay.io.

This time we want to highlight his work which combines a web app made with Spring and Thymeleaf, to control an LCD display connected to a Raspberry PI.

Creating a Snake Game with JavaFX FXGL in Three Pair-Programming Sessions

In this article, Almas and Frank show you how to start with an idea for a game and bring it to life in a prototype application. We will then modify the application to run on a Raspberry Pi and on a mobile device.

To give some background, some time ago my 10y old son challenged me to create a Snake-like game with emojis. He selected the emoji images and I “only” needed to do the programming bit, the easy part… Luckily Almas asked me if I had a topic for some pair-programming for his YouTube channel, and his question turned into a three-part series. My son is delighted because his idea is now a real game!

JavaFX Running in Kiosk Mode on the Raspberry Pi

Combined with an inexpensive touch screen, the Raspberry Pi makes for a perfect controller for a machine or game console.

Let’s see how we can use Java and JavaFX to build a test application that also communicates with the pins of the Raspberry Pi to control a LED.

Hazelcast, from Embedded to Client-Server

Java developers are particularly spoiled when using Hazelcast. Because Hazelcast is developed in Java, it’s available as a JAR, and we can integrate it as a library in our application.

Just add it to the application’s classpath, start a node, and we’re good to go. However, I believe that once you start relying on Hazelcast as a critical infrastructure component, embedding limits your options. In this post, I’d like to dive a bit deeper into the subject.