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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09:55 CEST

Running Zephyr in a Light Bulb - Alexandre Bailon, BayLibre

Monday August 25, 2025 09:55 - 10:35 CEST

D203

For many years, we have seen more and more connected devices entering our homes. In most cases, these devices run closed source software, which relies on cloud servers to work and is not always respectful of our privacy.

Alexandre Bailon, who is not really satisfied with the current offerings, has been looking for an alternative using Zephyr.

He has taken an existing device and developed a Zephyr firmware for it. He will present the technologies already available or in development to build a connected light bulb using Zephyr which should be more robust, secure, and respectful of privacy.

Speakers

Alexandre Bailon

Software Engineer, BayLibre

Alexandre Bailon is co-founder of BayLibre. He used to be a Linux kernel developer and has helped many companies build successful devices running Linux and Android.

Monday August 25, 2025 09:55 - 10:35 CEST
D203

Zephyr Developer Summit

Audience Experience Level Intermediate

11:20 CEST

Zephyr Workqueues: How They Work and Queue - Loic Domaigne, Doulos GmbH

Monday August 25, 2025 11:20 - 12:00 CEST

D203

Zephyr provides workqueue, a mechanism used to offload non-urgent processing to a lower priority thread. Workqueues are typically found in ISR (interrupt service routine) and high-priority threads.

In this talk, we shall present:
- what workqueues are, and what they are not,
- their typical use case
- how workqueues, scheduling and meta-IRQ threads relate,
- some best practices to address some common challenges, like sysworkq bottleneck, passing data or handling cancellation
- some lesser known workqueues, like the p4_wq

This is a practical hands-on talk. We’ll therefore run demo code and investigate what’s going on under the hood by looking at the Zephyr internal implementation! This will help us to get a solid understanding of workqueues, their usages and limitations, “directly from the source” (code).

Speakers

Loïc Domaigné

Senior Technical Staff Member, Doulos GmbH

Loïc loves sharing knowledge and is an enthusiastic instructor at Doulos since 2018. Loïc enjoys teaching Embedded Linux, Yocto, Python, Edge AI… and Zephyr Essentials, the new training he designed.

Monday August 25, 2025 11:20 - 12:00 CEST
D203

Zephyr Developer Summit

Audience Experience Level Any

13:30 CEST

Crabs Flying Kites: Writing a Zephyr Application in Rust - Mohammed Billoo, MAB Labs Embedded Solutions

Monday August 25, 2025 13:30 - 14:10 CEST

D203

Rust is becoming increasingly popular due to its ownership model and its innate ability to guarantee memory safety during compile time. A typical mantra of Rust developers is "if it compiles, it works".

Zephyr is experiencing explosive growth as an RTOS. Its focus on safety, security, flexibility, and vendor neutrality has enabled many product developers to choose Zephyr as the underlying RTOS in their embedded system.

Zephyr 4.1 introduced initial support for Rust. In this talk, Mohammed will guide developers on how to create a custom Zephyr application in Rust. He will demonstrate the process and outline some pitfalls that novices may encounter, and how to work around them.

Speakers

Mohammed Billoo

CEO, MAB Labs Embedded Solutions

Mohammed Billoo is an embedded software consultant with over 15 years of experience. He focuses on The Zephyr Project RTOS, Embedded Linux, and The Yocto Project. He has also developed user interfaces using the Qt framework. He has helped clients across numerous verticals, including... Read More →

Monday August 25, 2025 13:30 - 14:10 CEST
D203

Zephyr Developer Summit

Audience Experience Level Intermediate

14:25 CEST

Rust Meets Zephyr: Building Safer Embedded Applications - Martin Mosler, Zühlke Engineering AG

Monday August 25, 2025 14:25 - 15:05 CEST

D203

Rust revolutionizes systems programming with safety, performance, and concurrency, while Zephyr OS excels in embedded systems with modularity and hardware support. How well do these two technologies work together?

In this talk, we’ll explore the benefits and challenges of developing applications in Rust on top of Zephyr OS. Through a live demo and code walkthrough, I will showcase how Rust’s safety guarantees can enhance embedded application development while leveraging Zephyr’s robust ecosystem.

Key questions addressed include:

• Why should you consider Rust for embedded development?

• How does Rust integrate with Zephyr’s C-based APIs?

• What limitations and tooling gaps should you be aware of?

• How can you get started with Rust on Zephyr today?

This session will provide practical insights from real-world experience, helping you evaluate whether Rust is the right choice for your next embedded project. Whether you’re an embedded developer or a Rustacean curious about RTOS environments, this talk will equip you with actionable knowledge to start your journey.

Speakers

Martin Mosler

Principal Embedded Software Consultant, Zühlke Engineering AG

Martin Mosler is a seasoned software engineer with expertise in developing secure embedded systems. With a background in Rust programming, he has firsthand experience implementing secure concurrent code and is passionate about sharing his knowledge with the community.

Monday August 25, 2025 14:25 - 15:05 CEST
D203

Zephyr Developer Summit

Audience Experience Level Any

15:35 CEST

ZMS a New Lightweight Storage System - Riadh Ghaddab, Baylibre

Monday August 25, 2025 15:35 - 16:15 CEST

D203

Zephyr Memory Storage is a new key-value storage system that is designed to work with all types of non-volatile storage technologies. It supports classical on-chip NOR flash as well as new technologies like RRAM and MRAM that do not require a separate erase operation at all, that is, data on these types of devices can be overwritten directly at any time.

We will explore during this session the new functionalities introduced by this new storage system as well as the upcoming enhancements.

Speakers

Riadh Ghaddab

Senior Software Engineer, Baylibre

Riadh Ghaddab is a Senior Software Engineer currently working at Baylibre.

Monday August 25, 2025 15:35 - 16:15 CEST
D203

Zephyr Developer Summit

Audience Experience Level Any

16:30 CEST

Video4Zephyr: From Basic APIs Towards a Full-fledged Video Subsystem - Phi Bang Nguyen, NXP Semiconductors

Monday August 25, 2025 16:30 - 17:10 CEST

D203

Originally introduced in 2019, the Video4Zephyr (v4z) APIs provided a foundational interface for interacting with video devices in Zephyr. However, with minimal changes over the years, their limitations have become apparent—especially as video hardware grows more complex and camera-based applications become increasingly demanding.

This talk presents the current status of v4z, hightlighting recent improvements as well as sharing ongoing and upcomming works which turns the v4z from a simple driver API into a robust video subsystem. We’ll cover the devicetree video port/endpoint mechanism, a unified video control framework, enhanced buffer management, and support for memory-to-memory (m2m) devices, etc. These efforts aim to shift commont functionality and logic into the subsystem itself, significantly reduce the burden on driver developers - bringing the Zephyr’s video stack closer to a mature multimedia framework.

Speakers

Phi Bang Nguyen

Senior Embedded System Engineer, TechLead at NXP, NXP Semiconductors

I am currently an embedded system engineer and Multimedia IoT TechLead at NXP since 3 years. I am also an active collaborator of the Zephyr video subsystem. I am particularly passionate about image and video and was working on various related topics including computer vision, HCI... Read More →

Monday August 25, 2025 16:30 - 17:10 CEST
D203

Zephyr Developer Summit

Audience Experience Level Intermediate