google_assistant integration allows you to control things via Google Assistant on your mobile, tablet or Google Home device.
With Home Assistant Cloud, you can connect your Home Assistant instance in a few simple clicks to Google Assistant. With Home Assistant Cloud you don’t have to deal with dynamic DNS, SSL certificates or opening ports on your router. Just log in via the user interface and a secure connection with the cloud will be established. Home Assistant Cloud requires a paid subscription after a 30-day free trial.
For Home Assistant Cloud Users, documentation can be found here.
The Google Assistant integration (without Home Assistant Cloud) requires a bit more setup than most due to the way Google requires Assistant Apps to be set up.
To use Google Assistant, your Home Assistant configuration has to be externally accessible with a hostname and SSL certificate. If you haven’t already configured that, you should do so before continuing. If you make DNS changes to accomplish this, please ensure you have allowed up to the full 48 hours for DNS changes to propagate, otherwise, Google may not be able to reach your server. Once you have confirmed you can reach your Home Assistant from outside your home network, you can set up the Google integration:
Create a new project in the Actions on Google console.
New Projectand give your project a name.
- Click on the
Smart Homecard, then click the
Name your Smart Home actionunder
Quick Setupto give your Action a name - Home Assistant will appear in the Google Home app as
[test] <Action Name>
Build your Action, then click
- Add your Home Assistant URL:
https://[YOUR HOME ASSISTANT URL:PORT]/api/google_assistantin the
Fulfillment URLbox, replace the
[YOUR HOME ASSISTANT URL:PORT]with the domain / IP address and the port under which your Home Assistant is reachable.
- Click on the
Overviewtab, which will lead you back to the app details screen.
Account linkingis required for your app to interact with Home Assistant.
- Set this up by clicking on
Setup account linkingunder the
Quick Setupsection of the
- If asked, leave options as they default
No, I only want to allow account creation on my websiteand select
- Then if asked, for the
Authorization Code. Click
- Enter the following:
1. Client ID:
https://oauth-redirect.googleusercontent.com/r/YOUR_PROJECT_ID. (Find your YOUR_PROJECT_ID by clicking on the three little dots (more) icon in the upper right corner of the console, selecting
Project settings, your Project ID will be listed on the
GENERALtab of the
Settingspage.) 2. Client Secret: Anything you like, Home Assistant doesn’t need this field. 3. Authorization URL (replace with your actual URL):
https://[YOUR HOME ASSISTANT URL:PORT]/auth/authorize. 4. Token URL (replace with your actual URL):
https://[YOUR HOME ASSISTANT URL:PORT]/auth/token. Click
- In the
Configure your client
Add scope, then type
- Do NOT check
Google to transmit clientID and secret via HTTP basic auth header.
Next, then click
- Set this up by clicking on
Developtab at the top of the page, then in the upper right hand corner select the
Testbutton to generate the draft version Test App. If you don’t see this option, go to the
Testtab instead, click on the
Settingsbutton in the top right below the header, and ensure
On device testingis enabled (if it isn’t, enable it).
google_assistantintegration configuration to your
configuration.yamlfile and restart Home Assistant following the configuration guide below.
(Note that app versions may be slightly different.) Open the Google Home app and go to
+ Set up or add,
+ Set up device, and click
Have something already setup?. You should have
[test] your app namelisted under ‘Add new’. Selecting that should lead you to a browser to login your Home Assistant instance, then redirect back to a screen where you can set rooms and nicknames for your devices if you wish.
If you’ve added Home Assistant to your phone’s home screen, you have to first remove it from home screen, otherwise, this HTML5 app will show up instead of a browser. Using it would prevent Home Assistant redirecting back to the Google Home app.
If you want to allow other household users to control the devices:
- Open the project you created in the Actions on Google console.
Teston the top of the page, then click
Simulatorlocated to the page left, then click the three little dots (more) icon in the upper right corner of the console.
- Click Manage user access. This redirects you to the Google Cloud Platform IAM permissions page.
- Click ADD at the top of the page.
- Enter the email address of the user you want to add.
- Click Select a role and choose Project < Viewer.
- Click SAVE
- Copy and share the Actions project link (
https://console.actions.google.com/project/YOUR_PROJECT_ID/simulator) with the new user.
- Have the new user open the link with their own Google account, agree to the Terms of Service popup, then select “Start Testing”, select VERSION - Draft in the dropdown, and click “Done”.
- Have the new user go to their
Google Assistantapp to add
[test] your app nameto their account.
If you want to support active reporting of state to Google’s server (configuration option
report_state) and synchronize Home Assistant devices with the Google Home app (
google_assistant.request_sync service), you will need to create a service account. It is recommended to set up this configuration key as it also allows the usage of the following command, “Ok Google, sync my devices”. Once you have set up this component, you will need to call this service (or command) each time you add a new device in Home Assistant that you wish to control via the Google Assistant integration. This allows you to update devices without unlinking and relinking an account (see below).
- In the GCP Console, go to the Create Service account key page.
- At the top left of the page next to “Google Cloud Platform” logo, select your project created in the Actions on Google console. Confirm this by reviewing the
project_idand it ensure it matches.
- From the Service account list, select New service account.
- In the Service account name field, enter a name.
- In the Service account ID field, enter an ID.
- From the Role list, select Service Accounts > Service Account Token Creator.
- For the Key type, select the JSON option.
- Click Create. A JSON file that contains your key downloads to your computer.
- Use the information in this file or the file directly to add to the
service_accountkey in the configuration.
- Go to the Google API Console.
- Select your project and click Enable HomeGraph API.
- Try “OK Google, sync my devices” - the Google Home app should import your exposed Home Assistant devices and prompt you to assign them to rooms
Now add your setup to your
configuration.yaml file, such as:
# Example configuration.yaml entry google_assistant: project_id: YOUR_PROJECT_ID service_account: !include SERVICE_ACCOUNT.JSON report_state: true exposed_domains: - switch - light entity_config: switch.kitchen: name: CUSTOM_NAME_FOR_GOOGLE_ASSISTANT aliases: - BRIGHT_LIGHTS - ENTRY_LIGHTS light.living_room: expose: false room: LIVING_ROOM
Pin code to say when you want to interact with a secure device.
Service account information. You can use an include statement with your downloaded JSON file, enter data here directly or use secrets file to populate.
Actively report state changes on entities. This speeds up response time for actions affecting multiple entities since Google Assistant knows pre-hand what state they are. It is also required for some features on visual controls.
Expose devices in all supported domains by default. If
exposed_domains domains is set, only these domains are exposed by default. If
expose_by_default is set to false, devices have to be manually exposed in
List of entity domains to expose to Google Assistant if
expose_by_default is set to true. This has no effect if
expose_by_default is set to false.
Entity specific configuration for Google Assistant
Entity to configure
Currently, the following domains are available to be used with Google Assistant, listed with their default types:
- alarm_control_panel (arm/disarm)
- camera (streaming, requires compatible camera)
- group (on/off)
- input_boolean (on/off)
- input_select (option/setting/mode/value)
- scene (on)
- script (on)
- switch (on/off)
- fan (on/off/speed)
- light (on/off/brightness/rgb color/color temp)
- cover (on/off/set position)
- media_player (on/off/set volume (via set volume)/source (via set input source)/control playback)
- climate (temperature setting, hvac_mode)
- vacuum (dock/start/stop/pause)
- sensor (temperature setting for temperature sensors and humidity setting for humidity sensors)
- humidifier (humidity setting/on/off/mode)
Some of these devices may not display correctly in the Google Home app, such as media_player, however voice commands will still work.
Certain devices are considered secure, including anything in the
alarm_control_panel domain and
covers with device types
By default these cannot be opened by Google Assistant unless a
secure_devices_pin is set up. To allow opening, set the
secure_devices_pin to something and you will be prompted to speak the pin when opening the device. Closing or locking these devices does not require a pin.
For the Alarm Control Panel if a code is set it must be the same as the
code_arm_required is set to
false the system will arm without prompting for the pin.
Entities that have not been explicitly assigned to rooms but have been placed in Home Assistant areas will return room hints to Google with the devices in those areas.
There is not an exact 1-1 match between Home Assistant and Google Assistant for the available operation modes. Here are the modes that are currently available:
- heatcool (auto)
Syncing may fail after a period of time, likely around 30 days, due to the fact that your Actions on Google app is technically in testing mode and has never been published. Eventually, it seems that the test expires. Control of devices will continue to work but syncing may not. If you say “Ok Google, sync my devices” and get the response “Unable to sync Home Assistant” (or whatever you named your project), this can usually be resolved by going back to your test app in the Actions on Google console and clicking
TEST. Regenerate the draft version Test App and try asking Google to sync your devices again. If regenerating the draft does not work, go back to the
Action section and just hit the
enter key for the URL to recreate the Preview.
request_sync service requires that the initial sync from Google includes the
agent_user_id. If not, the service will log an error that reads something like “Request contains an invalid argument”. If this happens, then unlink the account from Home Control and relink.
request_sync service may fail with a 404 if the
project_id of the HomeGraph API differs from the
project_id of the Actions SDK found in the preferences of your project on Actions on Google console. Resolve this by:
- Removing your project from the Google Cloud API Console.
- Add a new project to the Actions on Google console Here you get a new
- Run through the previously mentioned [Actions on Google console] setup instructions until the step to create a
- Once you begin to create a new
service_accountin the [Google Cloud API Console], ensure you select the project created in [Actions on Google console] by verifying the
- Enable HomeGraph API to the new project.
Verify that the Google Assistant is available on
https://[YOUR HOME ASSISTANT URL:PORT]/api/google_assistant If it is working it should return
405: Method Not Allowed when opened in a browser or via curl.
request_sync service may fail with a 403 if the HomeGraph API is not enabled. Go to Google API Console and verify that HomeGraph API is enabled for your project.
If you receive 404 errors linked to reporting state in your log, Home Assistant is reporting state for entities that were never synced to Google. Ask your Google Home to
Sync my devices or run the service
Your fulfillment URL may be invalid or unreachable. Recheck the
Fulfillment URL as specified in Manual Setup and verify that it’s publicly reachable.
When using NGINX, ensure that your
proxy_pass line does not have a trailing
/, as this will result in errors. Your line should look like:
If you’re having trouble with Account linking failed after you unlinked your service, try clearing the browser history and cache.
If you’re having trouble linking your account, with the error message
Could not update the setting. Please check your connection after logging into your Home Assistant instance, try setting
expose_by_default: false then exposing a single simple device (light or switch preferably). It is also worth checking if any home ad blocker is disabled if you are having issues.