This repository contains LwM2M Client samples based on open-source Anjay Zephyr Module and Zephyr OS.

More information and step-by-step instruction can be found in the Anjay integration IoT Developer Zone.

The following examples are present:

First of all, get Zephyr, SDK and other dependencies, as described in Zephyr's Getting Started Guide (first 4 steps).

After navigating to Zephyr workspace (~/zephyrproject is default after following Getting Started Guide), clone Anjay Zephyr client repository.

git clone https://github.com/AVSystem/Anjay-zephyr-client

If you want to compile for nRF9160 targets, additional GNU Arm Embedded Toolchain is necessary, to install it follow installing the toolchain for NCS guide. Also for flashing nRF Command Line Tools have to be installed.

For further instructions, check README.md in the folder with the example in which you are interested.

The nRF Connect SDK has a set of plugins for Visual Studio Code (VSC). They can be used to simplify the build process for the nRF boards. To do that we need to set up VSC first.

NOTE: On a Linux system, first make sure that GNUARMEMB_TOOLCHAIN_PATH variable is set in the scope that Visual Studio Code is run.

You can set this permanently by adding a line similar to the following (adjusted to your toolchain installation directory) to your ~/.profile file (or ~/.bash_profile or ~/.zprofile etc., depending on your shell and preferences):

export GNUARMEMB_TOOLCHAIN_PATH="$HOME/gcc-arm-none-eabi-10.3-2021.10"

Open VSC and, on the Extensions tab, install the "nRF Connect for VS Code" plugin or the "nRF Connect Extension Pack" (which includes the former). After the installation, the "Welcome to nRF Connect" window should appear. In case it doesn't, you can open it from the nRF Connect tab -> Welcome -> Open Welcome page. Set nRF Connect SDK to the folder where west initialized Zephyr (~/zephyrproject is the default suggested in the Getting Started Guide). The "nRF Connect Toolchain" setting should point to the gnuarmemb toolchain installation folder, or in case of Linux, it should be set as "PATH" (it will use the setting from GNUARMEMB_TOOLCHAIN_PATH to find it).

If the environment was not set up earlier, go to the Source Control tab, open the Terminal tab (Ctrl+Shift+`). In case it opens in a wrong directory, navigate to where you have initialized Zephyr and its dependencies (e.g. ~/zephyrproject). Then run:

west config manifest.path Anjay-zephyr-client/demo
west config manifest.file west-nrf.yml
west update

NOTE: If building a project other than demo, please adjust the path in the above commands accordingly.

NOTE: West manifest folder can be changed in Source Control by clicking "Select manifest" on the root of the Zephyr repository and choosing a different folder. If the manifest is different a "west update" icon will show up next to the manifest file name. Clicking it will update the repository. If the manifest you want to change to has a different name (and not only a different path) then it must be changed directly using the west config command in the terminal.

This is why using the command line is necessary to choose the manifest for this project - the nRF-specific manifests are called west-nrf.yml, which is not supported by the plugin's GUI at the moment.

Now we can add the application to VSC workspace. Click on nRF Connect tab -> Application -> Add Application. Open the folder containing the prj.conf file (e.g. Anjay-zephyr-client/demo). In the Application section the demo application should show up. Click on "No build configuration" to add a configuration for the desired target, e.g. nrf9160dk_nrf9160_ns (you can have multiple configurations for different targets). Choose your target and click "Build Configuration" in order to build the application. Next builds can be started by choosing Actions -> Build.

Anjay-zephyr-client has the support for GPS implementation for nRF9160 targets which can be enabled using Kconfig options. Some of the available options are:

• CONFIG_ANJAY_ZEPHYR_GPS - enables/disables support for GPS
• CONFIG_ANJAY_ZEPHYR_GPS_NRF_A_GPS - enables/disables A-GPS using Nordic Location Services over LwM2M
• CONFIG_ANJAY_ZEPHYR_GPS_NRF_PRIO_MODE_PERMITTED - enables/disables support for allowing temporary activation of the GPS priority mode
  • if set, Anjay Zephyr will temporarily activate the GPS priority over LTE idle mode which shuts down LTE completely and attempts to acquire the fix in case GPS fix cannot be produced
  • by default, this option is disabled and can be enabled using Kconfig or shell commands (anjay config set gps_prio_mode_permitted)
• CONFIG_ANJAY_ZEPHYR_GPS_NRF_PRIO_MODE_COOLDOWN - determines (in seconds) how much time must pass after a failed try to produce a GPS fix to enable GPS priority mode again

To connect to Coiote IoT Device Management LwM2M Server, please register at https://eu.iot.avsystem.cloud/. Then have a look at the example configuration to configure security credentials and other necessary settings (like Wi-Fi SSID etc.).

Guide showing basic usage of Coiote DM is available on IoT Developer Zone.

NOTE: You may use any LwM2M Server compliant with LwM2M 1.0 TS. The server URI can be changed in the example configuration options.