liblwm2m is now wakaama (https://github.com/eclipse/wakaama). This repo is no longer updated. Please use https://github.com/eclipse/wakaama instead

liblwm2m is an implementation of the Open Mobile Alliance's LightWeight M2M protocol (LWM2M).

Source Layout

  +- server         (a command-line LWM2M server)
  |
  +- TLV            (application decoding two hard-coded TLV buffers)
  |
  +- utils          (utility functions for connection handling and command-
                     line interface)

Compiling

Despite its name, liblwm2m is not a library but files to be built with an application. liblwm2m uses CMake. Look at tests/server/CMakeLists.txt for an example of how to include it. Two compilation switches are used: LWM2M_CLIENT_MODE and LWM2M_SERVER_MODE. Define LWM2M_CLIENT_MODE to enable LWM2M Client interfaces. Define LWM2M_SERVER_MODE to enable LWM2M Server interfaces. Both can be defined at the same time.

Testing

To compile the test server

In the any directory, run the following commands: cmake [liblwm2m directory]/tests/server make ./lwm2mserver

The lwm2mserver listens on UDP port 5684. It features a basic command line interface. Type 'help' for a list of supported commands.

To compile the test client

In the any directory, run the following commands: cmake [liblwm2m directory]/tests/client make ./lwm2mclient

The lwm2mclient features four LWM2M objects:

• Server Object (id: 1) provided by the core.
• Device Object (id: 3) containing hard-coded values from the Example LWM2M Client of Appendix E of the LWM2M Technical Specification.
• FirmwareUpdate Object (id: 5) as a skeleton.

• a test object (id: 1024) with the following description:

                     Multiple
    Object |  ID  | Instances | Mandatoty |
     Test  | 1024 |    Yes    |    No     |
  
     Ressources:
                 Supported    Multiple
     Name | ID | Operations | Instances | Mandatory |  Type   | Range |
     test |  1 |    R/W     |    No     |    Yes    | Integer | 0-255 |
     exec |  2 |     E      |    No     |    Yes    |         |       |

The lwm2mclient opens udp port 5683 and tries to register to a LWM2M Server at 127.0.0.1:5684. It features a basic command line interface. Type 'help' for a list of supported commands.