End-of-life releases

Release notes and migration guides for end-of-life releases of Zephyr RTOS are kept here for historical purposes.

Release Notes

• Zephyr 4.1 Release Notes

• Zephyr 4.0 Release Notes

• Zephyr 3.6 Release Notes

• Zephyr 3.5 Release Notes

• Zephyr 3.4 Release Notes

• Zephyr 3.3 Release Notes

• Zephyr 3.2 Release Notes

• Zephyr 3.1 Release Notes

• Zephyr 3.0 Release Notes

• Zephyr 2.7 Release Notes

• Zephyr 2.6 Release Notes

• Zephyr 2.5 Release Notes

• Zephyr 2.4 Release Notes

• Zephyr 2.3 Release Notes

• Zephyr 2.2 Release Notes

• Zephyr 2.1 Release Notes

• Zephyr 2.0 Release Notes

• Zephyr 1.14 Release Notes

• Zephyr 1.13 Release Notes

• Zephyr 1.12 Release Notes

• Zephyr 1.11 Release Notes

• Zephyr 1.10 Release Notes

• Zephyr 1.9 Release Notes

• Zephyr 1.8 Release Notes

• Zephyr 1.7 Release Notes

• Zephyr 1.6 Release Notes

• Zephyr 1.5 Release Notes

Migration Guides

• Zephyr 4.1 Migration Guide

• Zephyr 4.0 Migration Guide

• Zephyr 3.6 Migration Guide

• Zephyr 3.5 Migration Guide