Google Assistant Device Actions with Android Things (example)

Blog post:
http://nilhcem.com/iot/an-introduction-to-device-actions-for-the-google-assistant

Hardware

• Raspberry Pi 3
• Blinkt hat
• MPR121 connected to I2C1, touch button on pin #11

Setting up the Google Assistant

• Enable the Google Assistant API and create an OAuth Client ID (name=androidthings-googleassistant) (Read here for help)
• Download the client_secret_NNNN.json file from the credentials section of the Console
• Use the google-oauthlib-tool to generate credentials:

pip install google-auth-oauthlib[tool]
google-oauthlib-tool --scope https://www.googleapis.com/auth/assistant-sdk-prototype \
          --save --headless --client-secrets /path/to/client_secret_client-id.json

• Copy the saved credentials (~/.config/google-oauthlib-tool/credentials.json) to ./google-assistant/src/main/res/raw/

• Open the Activity Controls page for the Google account that you want to use with the Assistant, and ensure the following toggle switches are enabled: Web & App Activity, Device Information, Voice & Audio Activity

Register the device

• Install the Google Assistant SDK package:

pip install --upgrade google-assistant-sdk

• Register a device model. In the command below, replace your-project-id with your Google Developer Project ID as the model must be globally unique (so it's a good idea to prefix it to help avoid collisions).
  Make sure you run the tool in the same directory you used to generate your credentials:

googlesamples-assistant-devicetool register-model --manufacturer "Assistant SDK developer" \
          --product-name "3D Lamp Assistant" --type LIGHT \
          --trait action.devices.traits.OnOff \
          --trait action.devices.traits.ColorSpectrum \
          --trait action.devices.traits.Brightness \
          --model your-project-id-3dlamp

• Verify that the traits are registered:

googlesamples-assistant-devicetool list --model

• Register the device instance. In the command below, replace your-project-id with your Google Developer Project ID, and change my-device-id to a unique device instance id within all of the devices registered under the same Google Developer project. (e.g.: device01):

googlesamples-assistant-devicetool register-device --client-type SERVICE \
          --model your-project-id-3dlamp \
          --device my-device-id

• Finally, update the google-assistant/build.gradle file to change the ASSISTANT_DEVICE_INSTANCE_ID and ASSISTANT_DEVICE_MODEL_ID buildConfigField to your own values