Zephyr Embedded RTOS releases
new versionZephyr Embedded RTOS is tracked under makers & open firmware. Its latest version, 4.5.0, shipped on Oct 28, 2026. Firmwarely has recorded 2 versions since Aug 7, 2026.
- Latest version
- 4.5.0
- Released
- Category
- Makers & open firmware
- Last checked
How to update Zephyr Embedded RTOS
- Read the release notes first — firmware changes can require re-doing your config or calibration.
- Use the project's own installer where it has one: a web flasher over USB, or an over-the-air update in its web UI.
- Otherwise build or download the binary for your exact board from the releases page — the wrong board file will not boot.
- Keep the previous firmware image and your config backed up so you can roll back.
Always install releases from the project itself. Firmwarely links out; it never hosts downloads.
What changed
We are pleased to announce the release of Zephyr version 4.5.0. For a closer look at some of the key additions in this release, check out the announcement article on the Zephyr blog, along with its companion video. Major enhancements with this release include: New architectures: Infineon TriCore an…
Version history
| 4.5.0 | |
| 4.4.2 |
FAQ
What is the latest version of Zephyr Embedded RTOS?
Version 4.5.0, released Oct 28, 2026. This page is refreshed every hour from the project's release page.
How do I update Zephyr Embedded RTOS?
See the step-by-step above. Pull the new image or package and restart the service. Read the release notes and back up the data directory first; most projects can't downgrade once the database has migrated.
How does Firmwarely know when there's a new version?
Every hour we read the project's official release page for Zephyr Embedded RTOS and record the version, date and changelog. Subscribers watching it get an email when it changes: the next morning on Pro, in the Monday roundup on the free plan.
Is this an official Zephyr page?
No. Firmwarely is independent. Project and product names belong to their owners; always install releases from the project's own source.
Get alerts for Zephyr Embedded RTOS
One email when a new release or a security fix ships: weekly and free for up to 3 devices, daily on Pro.