Our Blog: basysKom, Qt, Cloud, IoT, open62541, OPC UA, HMI Development and more.

Qt
QML
Jeremias Bosch

Speedup your Qt/QML list scrolling on lowend devices

Something that has traditionally been complicated to achieve in Qt/QML, especially on low end hardware, is high performant list scrolling with complex delegates.
This has recently changed. In Qt 5.15, it is as simple as setting the new QML ListView property called reuseItems to true. For more details, have a look at the documentation.
In this blog post, I will explain how you can implement this feature in Qt Versions prior to 5.15.

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Jeremias Bosch 12/10/2020 No Comments
Qt OPC UA
open62541
Frank Meerkötter

Qt OPC UA updates

The Qt OPC UA module has been ported to CMake and will be part of Qt 6 right from the first release.
In addition to numerous bug fixes and improved test coverage, the open62541 plugin has been updated to open62541 v1.1 and uses OpenSSL for security support, thus removing the dependency on mbedTLS.

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Frank Meerkötter 09/17/2020 2 Comments
Blog 1 basysKom, HMI Dienstleistung, Qt, Cloud, Azure
open62541
Jannis Völker

Support for PEM in the open62541 OpenSSL plugin

basysKom recently extended this plugin to also accept PEM-based input. PEM is a file format used for certificates and keys which is specified by an RFC and is a preferred format for a lot of open source software. The pull request has been merged and our contribution is available from the 1.1 branch (and will also hit the master branch soon).

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Jannis Völker 09/03/2020 No Comments
open62541
Azure
Jannis Völker

Connect OPC UA with open62541 to MS Azure IoT Hub

The open62541 OPC UA stack with its Pub-Sub extension now supports MQTT over TLS as well as MQTT-brokers requiring a login (contributed by basysKom). This allows the direct communication between open62541 and the Azure IoT Hub and therefore highly simplifies the connection of OPC UA based IoT Devices to the cloud.

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Jannis Völker 07/02/2020 No Comments
IoT Cloud
Azure
Heike Ziegler

IoT: Getting started with cloud and modern IoT and IIoT from scratch

IoT and IIoT applications are special compared to other kinds of cloud applications as they have to deal with devices existing “outside” of data centers.

The following series of articles provide an end-to-end overview of what Microsoft Azure offers to handle some of the challenges involved in connecting an IoT Device with the Cloud.

By working through this series you will learn about the major concepts involved in getting your IoT/IIoT device connected to Microsoft Azure. In our examples we will feature Qt, Node.Js, Protobuf from Google and much more to get you started.

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Heike Ziegler 05/12/2020 No Comments

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We are developing innovative applications, provide comprehensive consulting, hands-on coaching, and qualificatory training for capital and consumer goods companies. Our customers value our agile approach, our transparent processes, and our high standards.

Due to our own knowledge and our extensive experiences we are convinced of the advantages of open source software for our customers.

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