Zephyr Support Status

Zephyr Support Status

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General Information

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Questions about the contents of this page should be directed to:

• Espressif Sales Contact Page
• Espressif Technical Inquiries Page
• Zephyr Discord Server – Espressif Channel
• GitHub Issues
• GitHub Discussions

Additionally, be sure to check the Zephyr section on Espressif’s website for general information about Espressif and Zephyr. You can also use the chatbot for assistance.

For historical context, users can refer to the ESP32 Support Status RFC.

Zephyr Support Status

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Device Support Information

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Espressif began contributing directly to the Zephyr project in May 2020. Initially aiming to support only the ESP32, the strategy was later expanded to include other devices in response to community requests.

All ESP32** chips will eventually be supported, although support levels may vary across devices.

Since the release of version 4.0 for the ESP32-C3, the system has been considered stable for production. However, users are always advised to test the system with their specific application before making any major decisions.

Peripheral Support Table

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Legend:

• ✔️ : Supported
• ➕ : Work in Progress / Partially Supported
• ❌ : Not yet Supported
• 🚫 : Not available on this device

Zephyr Releases

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Devices and Release Plan

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Espressif fully adheres to the Zephyr schedule and plans its development around Zephyr’s public roadmap. The first ready-for-production release of Zephyr for Espressif products was version 4.0, targeting the ESP32-C3.

Best Release for Espressif Devices

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During the development stage, users are expected to use the latest available software. In other words, they should work with the most recent commit hash from the Zephyr GitHub repository, even if it does not correspond to a numbered release. The version will typically resemble v4.0-hashnumber.

Espressif strongly recommends adhering to the rolling release model for Zephyr-based software on its devices, staying aligned with upstream developments. Espressif considers Zephyr version numbers to be weak indicators of software status. Remaining between releases is not seen as problematic, given Git’s robust tracking capabilities. Furthermore, any backfixes that diverge from upstream will result in a fork, which, according to best practices, should be avoided.

Espressif follows Zephyr’s LTS releases solely for operating system bug fixes.

Disclaimers

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Espressif does not control the Zephyr Project and does not claim any ownership of it. The Zephyr Project is managed by the Linux Foundation, and Espressif participates as a regular contributor.

Accordingly, elements such as release dates, planning, issue classification, relevance levels, major technical decisions, and the activities of the Technical Steering Committee (TSC) and the broader community, as well as much of the information found on the Zephyr Project’s GitHub, are not under Espressif’s control or supervision.

Espressif remains fully committed to adhering the Zephyr Project’s rules, regulations, and governance, just like any other regular contributor.