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Unabhängig, offen und Open-Source-orientiert

In unserem Blog berichten wir über aktuelle Entwicklungen rund um die Technologien die wir schätzen und lieben. Wir sprechen über unsere Open Source Projekte und zeigen Ihnen in kurzen Tutorials wie Dinge funktionieren. Alle unsere Code Beispiele finden Sie, selbstverständlich, auf GitHub.

Revisiting NodeOPCUA

Jannis Völker
Dezember 10, 2024

The NodeOPCUA library is a very mature OPC UA implementation for TypeScript/JavaScript on the Node.js platform. Since the initial release eleven years ago, it has been continuously updated and extended by the main developer and various external contributors. Read this article to learn if NodeOPCUA might be the right OPC UA stack for your next project.

State of Flutter on Embedded Linux

Jeremias Bosch
November 26, 2024

Flutter, originally designed for mobile applications, has evolved to support a wide range of platforms, including embedded Linux. In this article, we explore why Flutter might be a viable choice for your embedded project, weigh its pros and cons, and compare it to Qt to see if it stands as a strong alternative.

Translating Qt Applications

Kai Uwe Broulik
Oktober 1, 2024

Translating a Qt application, can be a daunting task. This is an overview from Qt 5 to Qt 6 and what new functionality Qt 6.7 brings.

OPC UA: Programming against Type Descriptions

Jannis Völker
Juli 11, 2024

OPC UA client code that relies on hardcoded NodeIds is brittle and often only works with a specific OPC UA server instance. This article shows the proper way to write robust and portable OPC UA client code.

About QML Efficiency: Compilers, Language Server, and Type Annotations

Kai Uwe Broulik
Mai 6, 2024

In our last post we had a look at how to set up QML Modules and how we can benefit from the QML Linter. Today we’re going to set up the QML Language Server to get an IDE-like experience in an editor of our choice. We’ll also help the the QML Compiler generate more efficient code.

How To Use Modern QML Tooling in Practice

Kai Uwe Broulik
April 26, 2024

Qt 5.15 introduced “Automatic Type Registration”. With it, a C++ class can be marked as “QML_ELEMENT” to be automatically registered to the QML engine. Qt 6 takes this to the next level and builds all of its tooling around the so-called QML Modules. Let’s talk about what this new infrastructure means to your application in practice and how to benefit from it in an existing project.

Use Compute Shader in Qt Quick

Berthold Krevert
April 2, 2024

With this blog post, we introduce the QtQuickComputeItem – a Qt Quick item that allows you to easily integrate compute shader into your Qt Quick Code. Compute Shader are used to perform arbitrary computations on the GPU. For example, the screenshot below shows a Qt Quick application that generates Gray Scott Reaction Diffusion patterns. The simulation is executed by a compute shader that is configured directly in QML.

COOL – Flutter for embedded systems – a new approach for industrial HMIs

Frank Meerkötter
März 25, 2024

Join us at the April 2024 edition of the OSADL COOL series to hear about using Flutter for Embedded Linux HMIs.

🗓️ Date & Time: 24th April 2024, 2 PM
🌐 Format: Online, 2-hour session

Hello, RHI – How to get started with Qt RHI

Berthold Krevert
November 24, 2023

For some time now, Qt has been internally utilizing RHI (Rendering Hardware Interface), a new cross-platform technology for graphic rendering. Since Qt 6.6, this API has been semi-public, meaning that the API is mature for practical use but may still be subject to potential changes between major Qt versions. In this blog post, we demonstrate how to to get started with RHI.

RiveQtQuickPlugin now with Text Support

Jeremias Bosch
November 10, 2023

The RiveQtQuickPlugin has now integrated the latest rivecpp version. We’ve implemented rendering support for rive text elements. We ensured seamless text rendering compatibility across both software and hardware-backed renderers. Explore our latest blog post for a demonstration video and to learn about more rendering enhancements.

Embed Rive in your QtQuick applications

Berthold Krevert
Oktober 30, 2023

Learn how to use Rive within Qt and Qt Quick. Rive is a tool (and file format) that enables you to create interactive vector animations. With the RiveQtQuickPlugin, you can effortlessly load and display Rive animations within your QtQuick projects. In this article, we will demonstrate how to embed Rive files, use different rendering backends, load artboards and trigger animations.

Qt OPC UA – Data Type Code Generation

Jannis Völker
September 19, 2023

The type system of OPC UA permits the creation of complex and nested data types. With the merge of the generic struct decoding and encoding feature, the Qt OPC UA module has greatly improved the comfort of handling such types. But for large projects with lots of custom data types, its QVariant based interface might still feel a bit too complicated.

Generic Struct Handling is Coming to Qt OPC UA

Jannis Völker
September 14, 2023

OPC UA servers often use structured data types, for example when they are implementing a companion specification or exposing custom structured data types from a PLC program. Up to now, Qt OPC UA was just returning a binary blob when reading such a value and the decoding was left entirely to the user. Since OPC UA 1.04, there is a standardized way for a server to expose the data type description for custom data types. We have extended Qt OPC UA to use this information to make it much easier to encode and decode custom data types. The following article introduces the new API.

Introducing the RiveQtQuickPlugin – Powerful Animations For Your QtQuick Applications

Jeremias Bosch
September 6, 2023

Rive is a popular tool for vector animations. While the editor itself is a closed source commercial product, there are FOSS implementations for the player runtime. basysKom has developed a QtQuick integration based on the rive-cpp library. This article introduces the project and its current state.

OPC UA Reverse Connect for open62541

Frank Meerkötter
Juni 26, 2023

“OPC UA Reverse Connect” is a special connection mode in which the traditional roles of clients and servers during connection establishment are reversed – the server is responsible for initiating the connection to a client. This mode is intended for critical network environments (e.g. shop floor, production) where no inbound connections are allowed at all. basysKom has added support for “OPC UA Reverse Connect” to the open62541 stack. This article provides you with some entry points on how to use this new open62541 feature.