Integrating LwM2M Clients: A quick overview

In this guide, we will provide a brief overview of how to get started with integrating an LwM2M client in three popular embedded architectures: Zephyr OS, AzureRTOS, and FreeRTOS. Each platform has specific tools and resources to help you set up and manage LwM2M clients for your IoT devices.

Zephyr OS

Zephyr OS includes a fully integrated LwM2M client, streamlining the process of establishing LwM2M communication for IoT devices. The example in the GitHub repository ( is tailored for the STM32L4 Discovery IoT node, which uses Wi-Fi as its communication method. For more information on the STM32L4 Discovery IoT node, consult the official documentation:
While the example is specifically designed for the STM32L4 Discovery IoT node, it can be utilized as a foundation for various platforms and connectivity options. To adjust the example to accommodate different hardware or communication methods, you might need to modify configuration settings, device drivers, and hardware-specific code as needed.

To begin with, the Zephyr OS example, follow these steps:

Clone the repository:

git clone

Refer to the file in the repository for detailed instructions on setting up the development environment, configuring the built-in LwM2M client, and building the firmware.

Azure RTOS

For devices running Azure RTOS, you can utilize the NetX Duo LwM2M client. This LwM2M client has been developed as an Azure RTOS NetX Duo networking stack add-on, enabling seamless integration with your Azure RTOS-based projects.

The documentation is available here:

Also, a sample is available:

You will need to modify the example code and configuration settings as needed to suit your device and network requirements, such as connectivity method, endpoint name, and object instances.


For integrating an LwM2M client with FreeRTOS, you'll need to use the Eclipse Wakaama project. Wakaama provides LwM2M client and server implementations suitable for the FreeRTOS platform. It contains examples of using the TinyDTLS or the Mbed-TLS library to secure the connection.

To get started, clone the repository at, and follow the instructions. The way wakaama works is you need to provide callbacks to receive and send UDP packets and run the main loop. You will need to adapt the code to build and run on your platform.