- Last edited 5 months ago ago
How to integrate Azure IoT Edge on OpenSTLinux
1 Article purpose
The purpose of this article is to explain how to integrate the Microsoft Azure IoT Edge device  on OpenSTLinux.
This article explains step by step how to add the Yocto meta-data components needed on OpenSTLinux distribution, and how to configure and build the image.
You need to have an active Azure subscription, a "Free Trail" subscription is possible for 12 months. The way to do that is described in the Linux Quickstart document.
2.1 Hardware prerequisites
For more information about the STM32 discovery board and how to start it up, jump to this section Getting_started/STM32MP1_boards/STM32MP157x-DK2.
2.2 Software prerequisites
The STM32MP1 Distribution Package must be installed on your host. The process has been verified with the delivery ecosystem release v3.0.0 . For more information about the OpenSTLinux distribution package go to STM32MP1_Distribution_Package article.
Note that the software customizations have been applied on a (DISTRO: openstlinux-weston, MACHINE: stm32mp1) OpenSTLinux distribution environment, and for a st-image-weston image.
3 Software update with Yocto meta-iotedge and the dependencies
1.Get meta-iotedge  and the dependencies
cd [your STM32MP1 Distribution path]/layers/ git clone https://github.com/Azure/meta-iotedge.git git clone git://github.com/meta-rust/meta-rust.git git clone git://git.yoctoproject.org/meta-virtualization cd meta-iotedge git checkout a03c2f1c089f498658fbcec79a9a417212aae52d -b dunfell cd meta-virtualization git checkout 502b81ae3ae11bf4d889b7eff6239fb9e6c55994 -b dunfell cd meta-rust git checkout 7ff669d8cedd83a2d3efb73073a63b0a7efffddc -b INT_AZURE
2.Setup the build configuration
cd [your STM32MP1 Distribution path] DISTRO=openstlinux-weston MACHINE=stm32mp1 source layers/meta-st/scripts/envsetup.sh
3.Add the meta-iotedge layer and other dependencies yocto layers to the distribution configuration.
cd [your STM32MP1 Distribution path] bitbake-layers add-layer [your STM32MP1 Distribution path]/meta-rust/ bitbake-layers add-layer [your STM32MP1 Distribution path]/meta-virtualization/ bitbake-layers add-layer [your STM32MP1 Distribution path]/meta-iotedge/
4.Update the configuration to add the new components in your image.
- Add DISTRO_FEATURES_append = "virtualization" into [your STM32MP1 Distribution path]/layers/meta-st/meta-st-openstlinux/conf/distro/openstlinux-weston.conf
- Add IMAGE_INSTALL_append += "iotedge-daemon iotedge-cli libiothsm-std docker connman connman-client" into [your STM32MP1 Distribution path]/build-openstlinuxweston-stm32mp1/conf/local.conf
- Change ROOTFS_PARTITION_SIZE = "763904" to ROOTFS_PARTITION_SIZE = "2097152" in[your STM32MP1 Distribution path]//layers/meta-st/meta-st-stm32mp/conf/machine/include/st-machine-common-stm32mp.inc file
- delete "inherit python3targetconfig" in layers/meta-virtualization/recipes-extended/libvirt/libvirt-python.inc
3.1 Image build and flash
Go the article STM32MP1_Distribution_Package for the details about the process to build and flash your image.
To build the image:
In the folder [your STM32MP1 Distribution path]/build-openstlinuxweston-stm32mp1 Execute the command:
PC $>bitbake st-image-weston
4 Execution of the Azure IoT Edge demonstration
1.Update of the IoT Edge configuration file on the board
vi /etc/iotedge/config.yaml update hostname example with "stm32mp1" update connectionString with the primary connection string found in your Azure IoT HUB
2. Follow the process described on the Microsoft Azure  website