Zephyr 26.04 LTS

Zephyr 26.04 LTS is Canonical’s long-term support distribution of the Zephyr real-time operating system (RTOS). Canonical maintains Zephyr and its modules in the Zephyr RTOS Launchpad project.

Workshop is the standard development environment for Zephyr 26.04 LTS. The Zephyr Workshop SDK supplies the compiler, host tools, Python tools, and Zephyr dependencies for this release. Start with the Workshop tutorial.

If Workshop is not suitable for your system, follow the host system installation guide.

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In this documentation

Tutorial	Get started with Workshop
Development environments	Workshop environment • Host system installation • Development environment concepts
Hardware	Access hardware from Workshop • Flash hardware from Workshop
Source and releases	Source repositories • Releases • Zephyr 26.04 release notes
Project	Canonical’s Zephyr distribution • Support and security • Contribute

How this documentation is organized

This documentation follows the Diátaxis documentation framework, organizing content by the type of information users need. The four sections serve different purposes:

Tutorial: A hands-on learning path that takes you from a new development environment to a running Zephyr application.

How-to guides: Instructions for specific tasks, such as installing the toolchain on your host system or connecting a physical board to Workshop.

Reference: Technical details about the Workshop environment, source repositories, releases, and support.

Explanation: Discussion of the distribution model and the development environments available for Zephyr 26.04 LTS.

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Project and community

Zephyr 26.04 LTS is based on upstream Zephyr 4.4. Canonical maintains the distribution source and maintains its module revisions through a west manifest.

Get involved

• Contribute to this documentation

• Report a documentation issue

Releases and support

• Release notes

• Support and security

Governance and policies

• Ubuntu Code of Conduct

• Security policy

• License