Edge Impulse Example: standalone inferencing (Zephyr module)

This runs an exported impulse on most Zephyr development boards using Edge Impulse SDK Zephyr module and the Zephyr model deployment.

This project differs from example-standalone-inferencing-zephyr because it uses the Edge Impulse SDK Zepyhr module and the Zephyr library deployment for the model instead of copying the C++ library export.

Initialize this repo

To initialize this repo, run:

west init -m https://github.com/edgeimpulse/example-standalone-inferencing-zephyr-module
cd example-standalone-inferencing-zephyr-module
west update

zephyr and the latest available Edge Impulse SDK will be pulled.

Import the Edge Impulse SDK

There are different ways to import the Edge Impulse SDK Zepyhr module to be used with this project:

1. Update the west.yml of your Zephyr repo adding the lines below for the SDK then call west update to downlaod the SDK into your Zepyr repo.

Here's the lines to add the EI-SDK:

    - name: edge-impulse-sdk-zephyr
      path: modules/edge-impulse-sdk-zephyr
      revision: ${SDK_VERSION}
      url: https://github.com/edgeimpulse/edge-impulse-sdk-zephyr

2. Use this project as a manifest repository, running from this project folder:

west init --local .
cd ..
west update

to pull or update the modules needed.

Check the Zephyr module documentation for best practice.

Update model

Go to the deployment page of your project and choose the Zephyr library option and extract the .zip in the parent folder of this project.

Then update the sample you want to test in main.cpp :

static const float features[] = {
    // copy raw features here (for example from the 'Live classification' page)
    // see https://docs.edgeimpulse.com/docs/running-your-impulse-locally-zephyr
};

The extracted model should be placed here model see CMakeLists.txt

list(APPEND ZEPHYR_EXTRA_MODULES ${CMAKE_CURRENT_SOURCE_DIR}/model)

Build and flash

Build the project running

west build -p

Then flash it

west flash

You can specify the board you want to test by modifying the .west/config or by calling west build -b <your board> -p