Overview

Here we will explain the steps to build the iPRO Camera SDK app using the Azure IoT Edge container and check its operation. Also, in this tutorial, the SDK installation directory is described as ${SDK_DIR}.

This tutorial only supports SDK ver.2.00 or later. Please note that it cannot be used with SDK ver.2.00 or lower.

Operation confirmation procedure

Create a new IoT Edge Solution on Visual Studio Code

The following describes the case where the sample app to be referenced is skeleton_sample_app for the C version, additional_info_sample_app for the Python version, and test_app for the Edge Solution to be created. Please note that the Edge Solution name must be in all lowercase letters.

Description of C version/Python version application

The operation confirmation method for both the C version and Python version of the application is almost the same. I will explain using the C version as an example, and the different parts will be explained as appropriate. Also, the application path is as follows, so please read it as appropriate.

C version app path
${SDK_DIR}/src/adamapp

Python version app path
${SDK_DIR}/src/adamapp-py

Launch Visual Studio Code directly under [SDK folder].

cd ${SDK_DIR}
code .

Copy the ”${SDK_DIR}/src/adamapp/skeleton_sample_app” folder into the same folder.

Rename the copied folder to test_app.

Rename the "skeleton_sample_app" folder in [copied folder]/container/modules to test_app.

Right-click the folder (test_app) copied from Visual Studio Code's EXPLORER and select "Find in Folder..." to display the SEARCH window.

Search for "skeleton_sample_app" and replace everything with "test_app". The targets are as follows.

${SDK_DIR}\src\adamapp\test_app\container\deployment.template.json
${SDK_DIR}\src\adamapp\test_app\container\modules\test_app\module.json

Enter the information for the container registry to which you want to push the created image.

This document uses Azure Container Registry administrator login credentials to speed up development and testing. In production environments, we recommend using least-privilege authentication options like service principals or repository-scoped tokens. Please see here for details.

Log in to Azure portal(Cloud Computing Services | Microsoft Azure) and select the container registry you want to target. The screen below is an example.

Display "Settings" - "Access Keys" from the left menu.

Based on the information displayed, enter the following:

${SDK_DIR}\src\adamapp\test_app\container\deployment.template.json
Enter “registryCredentials” in the above file as follows. "Container Registry Name" is the "Registry Name" of Azure Portal in lower case (same as the string before .azurecr.io in "Login Server").
```
"registryCredentials": {
  "[container registry name]": {
    "username": "$CONTAINER_REGISTRY_USERNAME_[container registry name]",
    "password": "$CONTAINER_REGISTRY_PASSWORD_[container registry name]",
    "address": "[login server]"
  }
}
```
For example, if the container registry name is “iprocv5xcontainerregistry” and the container registry login server is “iprocv5xcontainerregistry.azurecr.io”, it will be as follows.
${SDK_DIR}\src\adamapp\test_app\container\modules\test_app\module.json
Enter “repository” in the above file as follows.
```
"repository": "[login server]/test_app"
```
If the container registry login server is "iprocv5xcontainerregistry.azurecr.io", it will be as follows.
${SDK_DIR}\src\adamapp\test_app\container
Create an .env file in the directory, write the container registry user name and password, and save it.
```
CONTAINER_REGISTRY_USERNAME_[container registry name]=[user name]
CONTAINER_REGISTRY_PASSWORD_[container registry name]=[password]
```
An example is shown below.

Coding the app

Now code as you like on Visual Studio Code. If you copy skeleton_sample_app etc., the source file name will be the one before copying (skeletonSampleApp.cpp for skeleton_sample_app), so please rename it if necessary. Below is an example.

Before
${SDK_DIR}\src\adamapp\test_app\skeletonSampleApp.cpp
After
${SDK_DIR}\src\adamapp\test_app\testApp.cpp

Please also modify SRC_FILES in Makefile as necessary. Below is an example.

${SDK_DIR}\src\adamapp\test_app\Makefile
Before
SRC_FILES=	skeletonSampleApp.cpp
After
SRC_FILES=	testApp.cpp

Please also modify PROG_NAME in Makefile, APPLICATION in configuration.txt, and APPLICATION_NAME in deployment.template.json as necessary. Below is an example.

${SDK_DIR}\src\adamapp\test_app\Makefile
Before
PROG_NAME= SkeletonSampleApp
After
PROG_NAME= TestApp

${SDK_DIR}\src\adamapp\test_app\configuration.txt
Before
APPLICATION	SkeletonSampleApp
After
APPLICATION	TestApp

${SDK_DIR}\src\adamapp\test_app\container\deployment.template.json
Before
"APPLICATION_NAME=SkeletonSampleApp"
After
"APPLICATION_NAME=TestApp"

Build the app

When building, use the built-in functionality of the Azure IoT extension. In Visual Studio Code's Explorer Right-click on "${SDK_DIR}\src\adamapp\test_app\container\deployment.template.json" to display the build menu.

Select “Build IoT Edge Solution”. This operation only performs a build.

For your first build, you will be asked to log in to your container registry. The following is an example when the container registry is "iprocv5xcontainerregistry.azurecr.io".

ERROR: failed to solve: iprocv5xcontainerregistry.azurecr.io/cadamappbase:0.0.2: failed to authorize: failed to fetch anonymous token: unexpected status: 401 Unauthorized

At this time, enter the following command on the Visual Studio Code terminal.

docker login iprocv5xcontainerregistry.azurecr.io

Then enter the Username and Password that are displayed. Enter the container registry user name and password.

Username: [user name]
Password: [password]

Login Succeeded is displayed, the login is successful.

Next, right-click "${SDK_DIR}\src\adamapp\test_app\container\deployment.template.json" and Select “Build and Push IoT Edge Solution”. This operation builds and pushes to the container registry.

The build is done by running Docker buildx build as described in the Dockerfile.arm64v8 file located under “${SDK_DIR}\src\adamapp\test_app\”. The environment name (arm64v8) after Dockerfile. is the architecture selected in the above step. (You can see the current architecture at the bottom of Visual Studio Code)

Check the built image

If the build is successful, you can check the existence of the image with docker images. Below is an example.

$ docker images
REPOSITORY                                                             TAG             IMAGE ID       CREATED          SIZE
iprocv5xcontainerregistry.azurecr.io/azureiot/test_app  0.0.5-arm64v8   f1772ccfed77   35 minutes ago   91.4MB

Deploy to camera

Select the device you want to deploy from under "AZURE IOT HUB" in the bottom left, right-click and select "Deploy to one IoT Edge" to deploy it to the camera. What to deploy Follows "${SDK_DIR}\src\adamapp\test_app\container\deployment.template.json".

A dropdown will appear at the top of Visual Studio Code, so select the following:
${SDK_DIR}\src\adamapp\test_app\container\config\deployment.arm64v8.json

Deployment Succeeded is displayed, the deployment is successful.

Check runtime status on Azure

Log in to the Azure portal(Cloud Computing Services | Microsoft Azure) and select the IoT Edge device you added on the IoT Hub - IoT Edge screen.

Check the runtime status of the deployed app shown at the bottom of the screen. If it is "running", no error has occurred. If "Error" is displayed, an error message will be displayed when you select it, so please debug it.

The runtime status will be "Error" for a while after deployment. It takes time to become "running". However, the amount of time required to become "running" depends on the app.

Check the operation of the app

Access the URL below with a PC that can connect to the camera.

http://[Camera local IP address]/cgi-bin/cadam.cgi?methodName=getApplicationList

The camera response will be displayed. Below is an example.

{
    "appCount": "1",
    "limitationMode": "Shared",
    "maxAppCount": "9",
    "appList": [
        {
            "appType": "0",
            "funcId": "0000FF01",
            "appInfo": {
                "installId": "124B569A",
                （中略）
}

Use the information marked "installId": "124B569A",.

Access the URL below.

http://[Camera local IP address]/cgi-bin/cadam.cgi?Language=1&methodName=sendDataToAdamApplication&installId=[installId]&s_appDataType=0&s_appData=e3tMYW5ndWFnZToxfX0%3D

If the camera's IP address is 192.168.100.33, "installId": "124B569A",, it will be as follows.

http://192.168.100.33/cgi-bin/cadam.cgi?Language=1&methodName=sendDataToAdamApplication&installId=124B569A&s_appDataType=0&s_appData=e3tMYW5ndWFnZToxfX0%3D

You can check the app operation as below. Below is an example of running skeleton_sample_app.

Checkpoints if things don't work in the WSL environment

If it does not work in WSL environment, please check the following.

The following must be enabled in the Visual Studio Code "LOCAL" extension
- Dev Containers
- Remote - SSH, Remote - SSH: Editing Configuration FIles, Remote - Tunnels, Remote Development, Remote Explorer
- WSL
The following must be enabled in Visual Studio Code's "WSL: UBUNTU-20.04" extension:
- Azure Account
- Azure IoT Edge
- Azure IoT Hub
"WSL: Ubuntu-20.04" is displayed at the bottom left of the Visual Studio Code screen.
If permission denied is displayed in Build IoT Edge Solution, check whether the current user has access rights to the target directory.
```
sudo chown -r ipro:ipro [development directory]
※ipro:ipro is an example, so please set it according to each environment.
```
Run the above to change the owner.

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How to develop and check the operation of an application (Container Adamapp)

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