The Zephyr Project Community Meetup Series is coming to Copenhagen, Denmark, bringing together developers, engineers, and open source enthusiasts interested in embedded systems and the Zephyr Project.
Hosted in one of Europe’s leading tech hubs, this in-person meetup is sponsored by Demant A/S, a global leader in hearing healthcare and audio technology, headquartered near Copenhagen.
The event is open to anyone curious about open source, embedded systems programming, and software development. Attendees can expect technical presentations covering products running Zephyr, along with insights into subsystems and features of the Zephyr RTOS. There will also be plenty of opportunities to connect with fellow community members.
Whether you are an experienced developer or just starting your journey into embedded systems, this meetup offers a great opportunity to learn, exchange ideas, and grow your network within the Zephyr ecosystem.
Thanks to:
Demant for hosting the meetup and supporting the venue and refreshments. We also appreciate STMicroelectronics for sponsoring hardware board giveaways, and speakers from companies including Nordic Semiconductor, Oticon, Linumiz GmbH, and NXP Semiconductors for sharing their expertise.
Agenda
4:30pm – 5:00 pm – Welcome Snacks and drinks
5:00 pm – 5:05 pm – Short introduction – Demant/Oticon team
5:05 pm – 5:20 pm – Demant in Zephyr – A history of using Zephyr in a tiny complex connectivity device – Bjarne Kielsholm-Ribalaygua, Director, R&D Project Management, Demant (15 minutes)
The story of Demant’s involvement in the zephyr project. How we successfully integrated an open source OS in our commercial product, and how we use Zephyr in the extremely resource constrained connectivity devices, which are modern hearing aids.
5:30 pm – 5:45 pm – Enhancing Bluetooth Audio in Zephyr: Bringing Bluetooth Classic to the party – David Potts, Distribution Technical Manager, NXP (15 minutes)
An overview of the latest additions and challenges in adding Bluetooth Classic audio support to Zephyr. This session will cover progress to date, explore initiatives to accelerate Bluetooth Classic audio development, and share plans for an A2DP application for end-to-end audio. Expanding CI/CV coverage for compliance and other aspects of solution robustness will also be discussed. Learn how NXP is contributing to a more robust and feature-rich Bluetooth stack in Zephyr and how you can get involved.
5:55 pm – 6:25pm – LE Audio and Auracast in Zephyr – Emil Gydesen, Software developer, Nordic Semiconductor (30 minutes)
Overview of the development status and process of LE Audio in Zephyr, and a demonstration of an Auracast application built with Zephyr.
6:35 pm – 7:05 pm – Break time
7:05pm – 7:20 pm – Embedded DX: From Datasheet to Zephyr Driver — Can Offline AI Accelerate Hardware Enablement? – Madan Raj Mohanraj, Managing Director, Linumiz GmbH (15 minutes)
Hardware enablement still depends heavily on passive documentation: datasheets, reference manuals, errata, schematics, board requirements, and vendor SDK examples. Engineers must manually interpret this material and translate it into framework-specific software assets such as drivers, devicetree bindings, Kconfig fragments, board overlays, samples, tests, and documentation.
This presentation introduces Embedded DX (Developer eXperience), an offline, domain-specific AI workflow being developed by Linumiz GmbH to explore whether hardware documentation can become an active engineering input for Zephyr-based development.
The talk will be presented from a product perspective, not as a deep Zephyr implementation session. I will share our current orchestration prototype, where the workflow is divided into focused roles for documentation interpretation, driver generation, protocol handling, coding, testing, and documentation. The purpose is not to claim full automation or replacement of embedded engineers, but to show how AI-assisted tooling could reduce repetitive documentation-to-code translation while keeping human review, traceability, and validation in the loop.
The session will focus on practical questions for the Zephyr community: where could this type of tooling help during hardware bring-up and platform enablement, where would it be risky, and what would engineers require before trusting generated Zephyr-oriented assets?
The goal is to share the workflow vision, show the early prototype direction, and collect technical feedback from engineers who work with Zephyr and hardware documentation in real product environments.
7:30pm – 8:00 pm – Dictionary-Based Logging on Battery-Powered Hearing Aids – Leonardo Bispo, Embedded developer, Oticon (30 minutes)
Zephyr’s dictionary-based logging replaces human-readable strings with compact binary messages decoded offline, a big win for constrained devices with minimal log storage. We extended the format to bare-metal boot stages so a single parser decodes the entire boot sequence. This talk covers the production benefits, the problems we found, especially the lack of message framing, where a single corrupted byte makes the rest of the log unreadable and our plans to add COBS or header based framing to make the stream self-recovering.
8:10 pm – 8:30pm – Quiz and board distribution
8:30 pm onwards – Networking time
Registration
Registration is required for this meetup so the hosts can plan the space and logistics accordingly. To learn more about the meetup or to register for a booth/table at the meetup, please check this page here.
Message from the host team:
Demant is very pleased to host this Zephyr Meetup and support the project and its fantastic community.
Demant has been a member of the Zephyr project since its early days in 2017 and we are using Zephyr extensively in embedded systems in our hearing instrument products. We have been particularly active within the Bluetooth implementation, using and contributing significantly to the BLE stack. We are continuously expanding our use of the Zephyr OS and see a bright future as part of this open-source project.
We look forward to seeing you in our headquarters near Copenhagen. It will be a pleasure to connect with other Zephyr developers and enthusiasts, exchange perspectives, and explore future applications of Zephyr in real-world contexts.
About the Community Meetups:
This meetup is part of the Zephyr Community Meetup Series, gatherings hosted by community members, with support from the Zephyr Project.
If you are excited about the Zephyr Project and want to share it with your local community, consider hosting an event in your city. Whether you are in Rennes or halfway across the globe, we encourage passionate individuals to get involved. Reach out to us and explore how you can bring Zephyr to your community and make a difference in the world of IoT development.
To keep up to date about the project, subscribe to the Zephyr quarterly newsletter or connect with us on @ZephyrIoT, Zephyr Project LinkedIn or the Zephyr Discord Channel to talk with community and TSC members.