RTOS: Zephyr Project

Check out this TechXchange that examines the compact Zephyr Project RTOS.
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Sept. 26, 2025
2 min read
Zephyr Project

What You'll Learn

  • What is the Zephyr OS?
  • Why is Zephyr OS important?
  • Articles and videos about Zephyr OS technology.

The Zephyr OS project is a compact, multi-threaded, open-source operating system designed for IoT applications. Its small footprint and connectivity make it ideal for resource-constrained environments like wearable applications as well as commercial and industrial applications requiring security. 

Zephyr offers lots of flexibility. For example, it supports multiple scheduling and queueing strategies. It uses devicetree to describe resources. And there's built-in support for networking, including Bluetooth Low Energy (BLE) 5.0. 

The Zephyr OS is important as it provides a common platform for IoT applications that can work together and with the cloud. Support and functionality are similar to Linux, but in a scaled-down solution that can fit on microcontrollers. Also in the mix are code portability and middleware that developers can utilize on a range of hardware. It also has broad vendor and community support.

Check back here to see what new Zephyr content we add in the future.  

Table of Contents

Zephyr Resources

These are links to resources you might find useful when working with the OS: 

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Zephyr OS Versions

You can always find the latest version at the Zephyr OS website. The latest source code is downloadable from their Git repository.

Here we highlight some of the new features in various versions in these articles. 

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Zephyr OS Features

These articles take a closer look at some of the features provided by the operating system.

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This video provides an in-depth examination of the Zephyr RTOS.
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Zephyr is a compact RTOS designed for resource constrained systems. This video highlights the use of code overlays.
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The Zephyr RTOS provides a secure, reliable foundation to build an embedded system, but challenges arise with multithreading, software timing, etc. Such aspects aren’t apparent...
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Zephyr is a compact RTOS designed for resource constrained systems. This video delves into debugging.
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Operating system
The compact Zephyr IoT operating system now takes advantage of MPU and MMU support.
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Zephyr: A Wearable Operating System
Wearable devices typically need a compact operating system like Zephyr to fit into low-power microcontrollers.

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Zephyr in Action

Listed below are some examples of the Zephyr OS being used in applications or as a platform for other frameworks. 

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Picking an RTOS

The Zephyr OS is just one of many RTOS platforms available for constrained-resource platforms. These articles take a look at the options and issues invovled. 

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Whether it’s safely operating a motor vehicle or a spacecraft on a distant planet, there's an RTOS that can make sure it gets there. Here's a field guide to real-time software...
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In today’s rapidly evolving landscape, open-source and community-backed initiatives are playing a crucial role in realizing the potential and versatility of MCUs to meet the ever...
Small Open-Source OSs for Small IoT Devices
A range of open-source operating-system solutions are available for those confined to scaled-down dimensions—homing in on the best option does require some research, though.
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Open standard RTOS application programming interfaces, such as POSIX pthread, help enhance software development.

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About the Author

William G. Wong
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William G. Wong

Senior Content Director - Electronic Design and Microwaves & RF

I am Editor of Electronic Design focusing on embedded, software, and systems. As Senior Content Director, I also manage Microwaves & RF and I work with a great team of editors to provide engineers, programmers, developers and technical managers with interesting and useful articles and videos on a regular basis. Check out our free newsletters to see the latest content.

You can send press releases for new products for possible coverage on the website. I am also interested in receiving contributed articles for publishing on our website. Use our template and send to me along with a signed release form. 

Check out my blog, AltEmbedded on Electronic Design, as well as his latest articles on this site that are listed below. 

You can visit my social media via these links:

I earned a Bachelor of Electrical Engineering at the Georgia Institute of Technology and a Masters in Computer Science from Rutgers University. I still do a bit of programming using everything from C and C++ to Rust and Ada/SPARK. I do a bit of PHP programming for Drupal websites. I have posted a few Drupal modules.  

I still get a hand on software and electronic hardware. Some of this can be found on our Kit Close-Up video series. You can also see me on many of our TechXchange Talk videos. I am interested in a range of projects from robotics to artificial intelligence. 

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