Open Source Summit Europe 2025: Full Schedule

25-27, August 2025
Amsterdam, Netherlands
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Note: The schedule is subject to change.

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IMPORTANT NOTE: Timing of sessions and room locations are subject to change.

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09:00 CEST

Enhancing OpenAMP: Making Linux and Zephyr Work Better Together - Luliana Prodan, NXP Semiconductors

Tuesday August 26, 2025 09:00 - 09:40 CEST

D202

As hardware becomes increasingly complex with heterogeneous multi-core architectures, integrating rich OS environments like Linux with RTOS-based cores poses significant challenges. The OpenAMP framework, leveraging Remoteproc and RPMsg, facilitates communication between these diverse environments, but it still has some limitations.

This presentation will explore key challenges in using OpenAMP for multi-core systems and discuss solutions that have been proposed and implemented. Topics include address translation for shared memory and handling remote processor replies required by the host.

We will also dive into recent enhancements in both Linux and Zephyr that improve interoperability, ensuring seamless communication and synchronization between heterogeneous cores.

Speakers

Luliana Prodan

Software Engineer, NXP Semiconductors

Software Engineer at NXP, specializing in Sound Open Firmware, Zephyr, and Linux.

Tuesday August 26, 2025 09:00 - 09:40 CEST
D202

Zephyr Developer Summit

Audience Experience Level Intermediate

09:50 CEST

Lightning Talk: Introducing the New Zephyr Stepper Driver API - Jilay Pandya, Carl Zeiss SMT GmbH

Tuesday August 26, 2025 09:50 - 10:00 CEST

D202

Agenda:

1. Discuss the motivation behind introducing the stepper driver API in the Zephyr Project.

2. Highlight how the community swiftly and constructively contributed to refining the API, resulting in a significantly improved version compared to the original proposal.

3. Provide a brief overview of how the RFC process within the Zephyr Project facilitates collaboration and garners attention from contributors.

4. Explain the features of the current Zephyr stepper API and its evolution over time.

5. Showcase the variety of driver support, ranging from basic GPIO-based drivers to advanced motion-control drivers.

6. Provide insights into existing samples and test suites designed to enable swift development and testing of new drivers using the Zephyr stepper API.

What are you hoping to achieve with your presentation?

1. Garner more attention for the Zephyr stepper API and encourage increased collaboration within the community.

What do you expect the audience to gain from your presentation?

1. An understanding of the typical RFC process in the Zephyr Project and its benefits.

2. Insights into the features available in the current stepper API and a preview of upcoming advancements.

Speakers

Jilay Pandya

Software Engineer, Carl Zeiss SMT GmbH

Embedded Software Engineer

Tuesday August 26, 2025 09:50 - 10:00 CEST
D202

Zephyr Developer Summit

Audience Experience Level Intermediate

10:05 CEST

Lightning Talk: Overview of the SCMI Support in Zephyr - Laurentiu Mihalcea, NXP

Tuesday August 26, 2025 10:05 - 10:15 CEST

D202

This presentation shall provide a very brief overview of the System Control and Management Interface (SCMI) support in Zephyr. This includes an architectural overview, which will go into the different layers and components that make up the support, and a list of supported features/protocols.

Speakers

Laurentiu Mihalcea

Software Engineer, NXP

MSc student, open-source enthusiast, and contributor to Zephyr and the Linux kernel. Interested in hardware and low-level software.

Tuesday August 26, 2025 10:05 - 10:15 CEST
D202

Zephyr Developer Summit

Audience Experience Level Any

10:20 CEST

Lightning Talk: A Reusable Zbus Based Architecture, Abstracting Core Application Components - Jaco Liebenberg, Plentify

Tuesday August 26, 2025 10:20 - 10:30 CEST

D202

Porting our products to Zephyr and a common microprocessor presented the opportunity to move to a higher proportion of common reusable code across devices. We present for community use and comment our architectural approach to developing a reusable Zephyr application code base.

We have leveraged zbus to create a standardised interface for inter thread communication, and a layer of zbus listeners (what we call a link layer) to enable our communication, UI, and system control to be reusable across products.

The approach is somewhat analogous to micro-services, in that our applications now each consist of ~5 independent services/modules. Each service delivers a specific independent function, and uses zbus to interface with the rest of the system in a common manner. But this is as far as the analogy goes. The choices were driven by a strong desire for maintaining a separation of concerns and modularity. So far it has proven itself to enhance testability, debugging, and to support significant code reuse and therefore maintainability of multiple code bases.

Speakers

Jaco Liebenberg

Senior Embedded Firmware Engineer, Plentify

I am an Electronic engineer, specializing

Tuesday August 26, 2025 10:20 - 10:30 CEST
D202

Zephyr Developer Summit

Audience Experience Level Intermediate

11:00 CEST

CoffeeCaller – a Fully Open Source Product Development Example - Andreas Kurz, TiaC Systems & Stefan Kraus, Independent

Tuesday August 26, 2025 11:00 - 11:40 CEST

D202

CoffeeCaller is an embedded device designed to coordinate coffee breaks between colleagues across an entire building. What began as a fun, free-time idea turned into an exploration of different product development approaches within the constraints of hobby time and budget. The goal wasn’t just to build something functional, but to try out techniques that could scale—from quick iterations to structured hardware-software integration.

We will show our journey from the idea to the finished project, that started with a simple proof of concept to validate the approach, followed by parallel development of hardware and software: While one created a custom hardware design in KiCad, the other development the actual application with Zephyr RTOS at the same time. We describe how we created the device tree as a bridge between both, keeping things modular and maintainable. We first implemented BLE Mesh for communication, later transitioning to openthread for broader connectivity. The entire project, including hardware and firmware, is open source.

Speakers

Andreas Kurz

Software Engineer, TiaC Systems

Software Engineer for the day job, Electrical Engineer in the free-time. Doing microcontroller projects as a hobby.

Stefan Kraus

Senior Software Engineer, Independent

With nearly 10 years of experience in Software Development, I am especially interested in ensuring reliability and quality in software products. Right now, especially working in the medical and cyber security field

Tuesday August 26, 2025 11:00 - 11:40 CEST
D202

Zephyr Developer Summit

Audience Experience Level Intermediate

11:55 CEST

Demystifying West - Carles Cufí, Nordic Semiconductor

Tuesday August 26, 2025 11:55 - 12:35 CEST

D202

West is Zephyr's swiss-army knife command-line tool. At its core it handles repository management, but in practice it does so much more than that. With plenty of powerful built-in features and the ability to extend its command set via the manifest file, west is able to cater for most use-cases a Zephyr user will face. This includes maintaining your own manifest as well as your own downstream of Zephyr itself or any of its ancillary repos, and even extending the west commands themselves. This talk will try to shed light on some of the most common questions around the tool, its use and its extension capabilities.

Speakers

Carles Cufí

Open Source, Nordic Semiconductor

Carles has been a firmware developer at several hardware, semiconductor and software companies for over 25 years. For the last 15 years he has worked at Nordic Semiconductor, where he was part of the team that made Nordic’s first ever Bluetooth Low Energy chip. During this time... Read More →

Tuesday August 26, 2025 11:55 - 12:35 CEST
D202

Zephyr Developer Summit

Audience Experience Level Any

14:10 CEST

Updates To Clock Management Within Zephyr RTOS - Daniel DeGrasse, Tenstorrent

Tuesday August 26, 2025 14:10 - 14:50 CEST

D202

This talk is intended serve as a continuation of my presentation for a proposed rework of Zephyr’s clock management subsystem delivered at EOSS 2024. Since then, the proposal has evolved and stabilized significantly. We will cover the current state of the implementation within Zephyr and discuss how we can work to move the implementation towards merging into mainline- if it has not merged by the time of the conference. Beyond this, the presentation will include detailed examples of how to implement clock management drivers and consume the clock management subsystem within peripheral drivers. This presentation will offer Zephyr driver maintainers as well as downstream consumers a chance to discuss and influence the direction we are taking regarding improving clock management within Zephyr.

Speakers

Daniel DeGrasse

Firmware Engineer, Tenstorrent

Daniel DeGrasse is the Zephyr maintainer of the disk, MIPI DBI, and SDMMC subsystems. He works as a firmware engineer at Tenstorrent, and is primarily focused on improving generic subsystems within Zephyr, as well as continuous integration

Tuesday August 26, 2025 14:10 - 14:50 CEST
D202

Zephyr Developer Summit

Audience Experience Level Any

15:05 CEST

Cortex-M(etal): Hyper-optimized Zephyr-Friendly Context Switching for a Mature Architecture - Andy Ross, Google

Tuesday August 26, 2025 15:05 - 15:45 CEST

D202

Sometimes performance matters. Sometimes legacy code can use a rewrite. Sometimes the lowest layers of the system need maintenance too. This is a deep dive on a rework to the ARM Cortex-M thread, interrupt and context switch layers, showing off induustry-leading performance and some of the advantage of cleaner "Modern Zephyr" architecturual choices.

Speakers

Andy Ross

Software Engineer, Google

Andy is a long-time Zephyr kernel contributor, and the author of much of the scheduler, SMP, and timer subsystems and the Xtensa architecture.

Tuesday August 26, 2025 15:05 - 15:45 CEST
D202

Zephyr Developer Summit

Audience Experience Level Intermediate

16:20 CEST

CANnectivity: Zephyr-based USB To CAN Adapter Firmware - Henrik Brix Andersen, Vestas Wind Systems A/S

Tuesday August 26, 2025 16:20 - 17:00 CEST

D202

A crucial component in the development of firmware utilizing Controller Area Network (CAN) communication is a host-connected CAN adapter. Several commercial and open-source solutions are available for this purpose, but each has its own limitations. The CANnectivity firmware, a Zephyr-based open-source firmware for Universal Serial Bus (USB) to Controller Area Network (CAN) adapters, aims to address these limitations.

This presentation will go over the considerations leading to the development of the CANnectivity firmware, its intended use cases, and the advantages it offers over existing solutions. I will provide an overview of the firmware’s architecture, the automated testing procedures currently in place for validation, and the future plans for its enhancement.

CANnectivity is available at https://github.com/CANnectivity/cannectivity

Speakers

Henrik Brix Andersen

Lead Embedded Software Engineer, Vestas Wind Systems A/S

Henrik Brix Andersen is Lead Embedded Software Engineer at Vestas Wind Systems A/S, providing firmware support for Vestas’ sustainable energy solutions. Brix is a passionate open-source software engineer and a long-standing contributor to the Zephyr RTOS project. He currently serves... Read More →

Tuesday August 26, 2025 16:20 - 17:00 CEST
D202

Zephyr Developer Summit

Audience Experience Level Any