The Zephyr Project is a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource constrained devices, and built with security in mind.

The Zephyr OS is based on a small-footprint kernel designed for use on resource-constrained systems: from simple embedded environmental sensors and LED wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr kernel supports multiple architectures, including ARM (Cortex-A, Cortex-R, Cortex-M), Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V, SPARC, MIPS, and a large number of supported boards.

Getting Started

Welcome to Zephyr! See the Introduction to Zephyr for a high-level overview, and the documentation's Getting Started Guide to start developing.

Community Support

Community support is provided via mailing lists and Discord; see the Resources below for details.

Resources

Here's a quick summary of resources to help you find your way around:

• Help: Asking for Help Tips
• Documentation: http://docs.zephyrproject.org (Getting Started Guide)
• Source Code: https://github.com/zephyrproject-rtos/zephyr is the main repository; https://elixir.bootlin.com/zephyr/latest/source contains a searchable index
• Releases: https://github.com/zephyrproject-rtos/zephyr/releases
• Samples and example code: see Sample and Demo Code Examples
• Mailing Lists: users@lists.zephyrproject.org and devel@lists.zephyrproject.org are the main user and developer mailing lists, respectively. You can join the developer's list and search its archives at Zephyr Development mailing list. The other Zephyr mailing list subgroups have their own archives and sign-up pages.
• Nightly CI Build Status: https://lists.zephyrproject.org/g/builds The builds@lists.zephyrproject.org mailing list archives the CI nightly build results.
• Chat: Real-time chat happens in Zephyr's Discord Server. Use this Discord Invite to register.
• Contributing: see the Contribution Guide
• Wiki: Zephyr GitHub wiki
• Issues: https://github.com/zephyrproject-rtos/zephyr/issues
• Security Issues: Email vulnerabilities@zephyrproject.org to report security issues; also see our Security documentation. Security issues are tracked separately at https://zephyrprojectsec.atlassian.net.
• Zephyr Project Website: https://zephyrproject.org