Anjay-freertos-client

Supported hardware and overview

This repository contains LwM2M Client application based on open-source Anjay library and X-Cube-Cellular package which includes cellular modem drivers, FreeRTOS as well as mbedtls. This example supports the following configurations:

The project was developed using STM32Cube tools (STM32CubeIDE in particular).

The following LwM2M Objects are supported:

• Security (/0),
• Server (/1),
• Device (/3),
• Firmware Update (/5) (STM32L496G-DISCO and B-L462E-CELL1 projects),
• Temperature (/3303),
• Humidity (/3304),
• Accelerometer (/3313),
• Magnetometer (/3314),
• Barometer (/3315),
• Gyrometer (/3334),
• Multiple Axis Joystick (/3345).

Cloning the repository

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

Compilation guide

• Download STM32CubeIDE
• Import the cloned project to your workspace
• In the Project Explorer navigate to one of the [Project Path] taken from the table above, depending on the hardware you use.
• To build and run the project:
  • For B-U585I-IOT02A board: simply build and run Anjay-freertos-client-B-U585I-IOT02A-BG96 configuration.
  • For STM32L496G-DISCO and B-L462E-CELL1 boards: please follow the instructions in Projects/STM32L496G-DISCO/README.md and Projects/B-L462E-CELL1/README.md respectively.

Connecting to the LwM2M Server

To connect to Coiote IoT Device Management LwM2M Server, please register at https://eu.iot.avsystem.cloud/. Then have a look at the Configuration menu to configure security credentials.

If you use BG96-based configuration, you must upgrade the firmware of the modem to at least BG96MAR02A08M1G revision. Older versions may cause an unexpected loss of connection.

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

Configuration menu

While connected to a serial port interface, and during bootup, the device shows:

Press any key in 3 seconds to enter config menu...

You can then press any key on your keyboard to enter the configuration menu. After that, you'll see a few configuration options that can be altered and persisted within the flash memory for future bootups.

Module persistence

This application features persistence of the Security object, Server object and client's Attribute Storage to retain the configuration of those modules over power cycles, to e.g. keep bootstrapped server configuration.

To enable module persistence, set properly "Use persistence" option in the shell config menu. The application will attempt to load those modules from a non-volatile memory. Configuration of those modules from the shell will be ignored unless the application fails to restore the state from the memory.

The persisted state of the aforementioned modules may be cleared using the "Clear module persistence" option.

Core Persistence (commercial feature)

This application features Core Persistence that allows to retain the core library state over power cycles, to e.g. keep the TLS session valid.

This feature is available only with releases of Anjay that include the Core Persistence commercial feature. To use the Core Persistence feature, make sure that the ANJAY_WITH_CORE_PERSISTENCE option is enabled, which requires also to enable ANJAY_WITH_OBSERVE in Application/Inc/anjay/anjay_config.h, AVS_COMMONS_WITH_AVS_PERSISTENCE in Application/Inc/avsystem/commons/avs_commons_config.h and WITH_AVS_COAP_OBSERVE_PERSISTENCE in Application/Inc/avsystem/coap/avs_coap_config.h

If the Core Persistence is compiled in, it works on a similar basis in terms of enabling/disabling and clearing it as the module persistence.

SIM Bootstrap (commercial feature)

STM32L496G-DISCO-BG96 and B-U585I-IOT02A/BG96 projects now feature the SIM Bootstrap that allows bootstrapping the device using the SIM Smartcard. This feature is available only with releases of Anjay that include the bootstrapper commercial feature. To use the SIM Bootstrap feature, define USE_SIM_BOOTSTRAP in the STM32L496G-DISCO-BG96 or B-U585I-IOT02A-BG96 project settings and make sure that the ANJAY_WITH_MODULE_BOOTSTRAPPER and ANJAY_WITH_MODULE_SIM_BOOTSTRAP options are enabled in Application/Inc/anjay/anjay_config.h.

SMS Trigger (commercial feature)

Every project now features the SMS Trigger. This feature is available only with releases of Anjay that include the SMS commercial feature. To use the SMS Trigger feature, define USE_SMS_TRIGGER in the project settings and make sure that the ANJAY_WITH_SMS option is enabled in Application/Inc/anjay/anjay_config.h.

To enable the SMS trigger, set the "Use SMS trigger" option to y in the shell config menu. Then set local's and server's MSISDN numbers properly.