ACME oneM2M CSE

An open source CSE Middleware for Education.

Version 2026.05.1

oneM2M Python Maintenance License MyPy
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Overview

This oneM2M compliant CSE implements a subset of the oneM2M standard (see http://www.onem2m.org). The intention is to provide an easy to install, extensible, and easy to use and maintainable CSE for educational purposes.

See https://acmecse.net for more exhaustive information.

Changes

Please see the Changelog and this discussion for a detailed list of changes.

Highlights in this release

  • Support for plugins to extend the CSE's functionality.
    Most of the CSE's functionality is now implemented in plugins. This allows for better modularity and extensibility of the CSE's functionality. Plugins can be enabled and disabled, depending on the use case, requirements, and available system resources.
    User defined plugins can be added to the CSE to extend the CSE's functionality with custom handlers, bindings, HTTP server extensions, etc. This allows to easily add custom functionality to the CSE without modifying the CSE's source code.
  • The full API documentation is now available at https://api.acmecse.net.
  • Implementation of various new oneM2M features, such as support for SP-ID and IN-CSE-ID attributes for remote CSEs.
  • Internal restructuring how resource types are defined and configured. The resource types are now defined by an external JSON file that is loaded during CSE initialization. This allows for better modularity and extensibility of the resource types and their attributes.
  • Improved support for data types for the ContentInstance resource type.
  • Many performance improvements and bug fixes, such as much better performance when many AE registrations are present.

What to expect in the next release

See the announcement in the discussions.

Acknowledgements

Many People have contributed to this project and helped to make it what it is today with their ideas, suggestions, and code. Please see the Acknowledgements for the list of contributors.

Join the Discussions on Discord

Join the ACME CSE community on Discord to discuss the project, ask questions, and get help.

License

BSD 3-Clause License for the CSE and its native components and modules. Please see the individual licenses of the used third-party components.