Google Assistant Setup

For the voice AI logic to work on your app or service, you need to set up Google Assistant on your device.

Creating a New Project

  1. Create a Google account.

  2. Go to the Actions Console and perform the following steps:

    1. Click New Project.

    2. Accept the Terms of Service and click AGREE AND CONTINUE.

    3. Type a name of your project and click Create project.

You just created a new Actions Console project. For your convenience, keep this page open and go to the next step. We will register a device in Registering the Device Model.

Enabling Google Assistant API

  1. Go to the Google APIs.

  2. Accept the terms of service and click Agree and Continue.

    This page might not show up if you have already accepted the terms of service.
  3. Select the project that you made in the previous step and click OPEN.

    A dropdown menu for selecting a project

  5. Type ‘Google Assistant API’ in the search box and click the result.

  6. Click ENABLE.

If the API is set correctly, a dashboard of Google Assistant API will show up.

A dashboard of Google Assistant API

Now it’s time to configure consent screen. In the Google Assistant API dashboard, do the following:

  1. Click Credentials menu on the left.

  2. Click CONFIGURE CONSENT SCREEN to go to OAuth consent screen menu.

    Configuring consent screen menu
  3. Set External for the User Type and click CREATE.

  4. Set the Support email and click Save. You can choose the email using the dropdown menu.

    Setting up support email
    Most values in the OAuth consent screen menus are optional. You can change those anytime.

Setting Up Activity Controls

To use Google Assistant API, you have to share the Activity Controls data with Google.

  1. Go to Activity controls page.

  2. In the Web & App Activity box, make sure the following checkboxes are selected:

  • Include Chrome history and activity from sites, apps, and devices that use Google services
  • Include voice and audio recordings

Registering the Device Model

To register the device model, you have to go back to the page which you opened in Creating a New Project.


If you closed the page, you can go the device registration page as follows:

  1. Visit Action Console page.
  2. Click your project.
  3. Click Develop menu on the top.
  4. Click Device registration on the left.

In this case, you can skip the following step 1.

  1. Click Device registration menu at the bottom.

    Device registration menu

  3. Fill out the blanks and click REGISTER MODEL.

  4. Click Download OAuth 2.0 credentials. A client secret file (in JSON format) will be downloaded. This JSON file will be used in Register the Device ID. Click Next.

  5. (Optional) Click the trait checkbox that you want and click SAVE TRAITS. To skip this step, click SKIP.

You can see the registered device information in Device registration menu.

A device list in the device registration menu

Setting Up Your Target Device

It’s time to set up your target device. Before you start it, make sure the following have been completed:

  • Creating Actions Console project and registering the device model
  • Enabling Google Assistant API
  • Setting up Google account’s activity controls
  • Downloading the client secret file

Get a Credentials File

Get a credentials file using the downloaded client secret file (in JSON format).

  1. Move the client secret file from local PC to your target device:

    $ scp <downloaded client secret file> root@<your target device IP>:/etc/googleAssistant/client_secret.json
    You must change the name of the client secret file into client_secret.json.
  2. From the target device, run the following script:

    $ cd /etc/googleAssistant
    $ ./
  3. Copy the URL in the terminal and paste it to your browser.

  4. Allow the permissions.

  5. Copy the sign-in code and paste it to your terminal. It will create the credentials.json file.

Register the Device ID

Now you register an ID for device model that you created in Registering the Device Model.

  1. Open device_id.json file.

    $ cd /etc/googleAssistant
    $ vi ./device_id.json
  2. Modify the fields:

  3. Register the device using the command:

    $ ./

Configure AI Service

  1. Enter the command:

    $ vi /etc/systemd/system.conf.d/googleassistant.conf
  2. Modify the fields:

  3. Reboot the device or restart the service daemon:

    $ reboot


    $ systemctl restart ai

Testing Google Assistant API

You can check if the settings are correct by using API.

  • You need a microphone to proceed with the following test.
  • For more information about the test codes, see API.

Step 1. Call the start() method

/sysroot/home/root# luna-send -n 1 -f luna:// '{"mode": "continuous", "keywordDetect": true}'
  "returnValue": true

Step 2. Call the getState() method

root@raspberrypi4:/sysroot/home/root# luna-send -i -f luna:// '{"subscribe": true}'
    "state": "waitActivation",
    "subscribed": true,
    "returnValue": true

Step 3. Say “Snowboy” to Your Microphone

This action changes the state of API. If the state comes back to “waitActivation”, your Google Assistant API is set successfully.

    "state": "recording"
    "state": "answering"
    "state": "thinking"
    "state": "answering"
    "state": "waitActivation"   <-- Success!

Google assistant also supports custom device actions.

  • For more information on the custom actions file, refer to /etc/googleAssistant/action.en.json.
  • To use custom device actions, the gactions CLI tool is required.