The Zephyr ProjectTM strives to deliver the best-in-class RTOS for connected resource-constrained devices, built to be secure and safe.

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Secure

  • Developed with security in mind
  • Includes CNA with PSIRT response team

Open Source

  • Available through the Apache 2.0 open source license
  • Free to use in commercial and non-commercial solutions

Product Ready

  • Long term support (LTS) with security updates
  • Auditable code base developed with a goal of safety certifications

Connected

  • Supports Bluetooth® Low Energy, Wi-Fi*, 802.15.4
  • Supports standards like 6LoWPAN, CoAP, IPv4, IPv6, Ethernet, USB, CAN and Thread

Complete flexibility & freedom of choice

  • Open source & neutral governance
  • Supports multiple hardware architectures
  • Small footprint: scales from small Cortex-M devices to multi-core 64-bit CPUs

Connect embedded devices securely to any cloud

  • Multiple protocol options including BLE mesh and Thread
  • Supporting industrial, automotive, smart city and smart home
  • Cloud agnostic – Connect with transport layer security to any cloud

Develop products with safety built in

  • Long-term support
  • In-depth security development lifecycle
  • Functional safety certification coming soon

200+ Boards Supported

Zephyr supports more than 200 boards. Search our list for the hardware used in your application. This diversity of supported boards gives developers and product manufacturers multiple options to solve their embedded RTOS challenges with Zephyr. If your board is not supported out of the box, adding support for a new board is simple.

em board
Zephyr up squared board
Zephyr hexiwear k64 board
Zephyr stm32 board
Browse Supported Boards
“

As a founding member of the Zephyr Project, we are excited to support this latest release that brings new feature enablement and support to our expanding portfolio of i.MX RT crossover processors. The Zephyr 1.14 LTS release provides developers a well-tested, stable foundation for immediate project start and is based on a rich, open source microcontroller ecosystem that supports exciting new applications.

Maureen HelmNXP Microcontroller Software Architect and Zephyr Technical Steering Committee member
“

We are very excited to see that the Zephyr Project has gotten to the major milestone this LTS release is. Having the long term support option is something which is very often requested by our customers. This is especially the case for segments where development runs over longer times or for products with long lifecycles. Having the opportunity to introduce minor patches without rebasing the entire firmware framework is a major advantage for these users.

Paal KastnesTechnical Marketing Manager with Nordic Semiconductor
“

With the release of Zephyr 1.14 LTS, developers can focus on differentiation with the confidence that the software they are developing on always has the important fixes and latest security updates. Linaro is pleased to have helped drive the release which provides developers with a stable set of API for real world applications on constrained devices.

Kumar GalaLinaro IoT and Embedded Group (LITE) Technical Lead and Zephyr Project 1.14 LTS Release Manager

Platinum Members

Learn More About Membership

Zephyr project members help shape the direction of the project and provide guidance to help all members of the community get the most out of Zephyr.

48697
Commits
883
Contributors
79
Repositories
20956
Pull Requests Closed

Statistics last updated on February 16, 2021

April 16, 2021 in Blog, News, Top News

Zephyr hosts its first-ever Developer Summit this summer

The Zephyr Project is excited to announce it is hosting its first-ever Developer Summit on Tuesday, June 8 - Thursday, June 10. A free virtual event, the Zephyr Developer Summit offers…
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April 13, 2021 in Blog, News, Top News

Zephyr RTOS on ESP32

Written by Glauber Ferreira, Embedded Software Engineer The blog originally ran on The ESP Journal Medium site. For more content like this, click here. Zephyr is a very low footprint…
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April 8, 2021 in Blog, Top Event, Top News

Linux Foundation Training Scholarships Are Back! Apply by April 30

Written by Dan Brown, Senior Manager, Content & Social Media, LF Training Linux Foundation Training (LiFT) Scholarships are back! Since 2011, The Linux Foundation has awarded over 600 scholarships for…
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April 6, 2021 in Blog, News, Top News

Celebrating our 5 year anniversary with the Zephyr v2.5 release

Written by Anas Nashif, Zephyr 2.5 Release Manager and Member of the Zephyr Technical Steering Committee Launched in 2016, the Zephyr Project celebrates its 5 year anniversary in 2021 and…
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