Zephyr Project Documentation

Welcome to Zephyr Project Documentation for the main tree (4.3.99).

Use the version selector for released versions.

What is Zephyr?

Discover the core concepts, features, and architecture.

Getting Started

A step-by-step guide to set up your environment & blink your first LED.

Supported Boards

Browse 1,000+ supported boards and shields.

Code Samples

Explore hundreds of ready-to-run examples.

Choose Your Starting Point

Find documentation tailored to what you're trying to accomplish.

Building an Application

Use Zephyr APIs and services in your firmware.

• RTOS Kernel
• Services
• Application development
• Code samples

Bringing Up New Hardware

Port and run Zephyr on hardware.

• Device Driver Model
• Devicetree
• Board Porting Guide
• SoC Porting Guide

Going to Production

Considerations for using Zephyr in your product.

• Security
• Safety
• Long-term Support
• Product Showcase

Contribute to Zephyr

The Zephyr Project is open source and community-driven.
Learn how to report bugs, request new features, and submit pull requests.

Read the Guidelines

Core References

Essential resources for in-depth information

API Reference

Complete C API docs

Kconfig

Configuration system

Devicetree

Hardware bindings

West Projects

Available projects

Glossary

Key term definitions