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Update Google Tasks documentation (#36365)

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@ -23,67 +23,135 @@ related:
title: Google Tasks
- url: https://console.cloud.google.com/apis/library/tasks.googleapis.com
title: Google Developers Console
google_dev_console_link: https://console.developers.google.com/start/api?id=tasks
api: Google Tasks API
api_link: https://console.cloud.google.com/apis/enableflow?apiid=tasks.googleapis.com
---
The **Google Tasks** integration allows you to connect your [Google Tasks](https://support.google.com/tasks/answer/7675772) to Home Assistant. The integration adds a [to-do list entity](/integrations/todo) for
each task list, allowing you to create, update, or delete items on the list from the **To-do list** dashboard.
The **Google Tasks** integration allows you to connect your [Google Tasks](https://support.google.com/tasks/answer/7675772)
to Home Assistant. The integration adds a [to-do list entity](/integrations/todo) for
each task list, allowing you to create, update, or delete items on the list
from the **To-do list** dashboard.
{% note %}
The Google Tasks public API does not support viewing or setting the due time of tasks, only the due date.
{% endnote %}
You can use to-do lists in automations, such as adding a new task when Home Assistant detects
a device has low batteries. When you combine with a Home Assistant voice assistant, you can
manage your Google Tasks by saying something like *Add clean out garage to personal task list*.
## Prerequisites
You need to configure developer credentials to allow Home Assistant to access your Google Account.
These credentials are the same as the ones for [Nest](/integrations/nest) and [Google Mail](/integrations/google_mail).
These credentials are the same as the ones for [Nest](/integrations/nest), [Google Mail](/integrations/google_mail), and most other Google integrations.
These are not the same as *Device Auth* credentials previously recommended for [Google Calendar](/integrations/google).
If you have already set up the correct credentials, you can do step 1 and then skip to step 13 on the below instructions.
{% details "Generate Client ID and Client Secret" %}
This section explains how to generate a Client ID and Client Secret on
[Google Developers Console](https://console.cloud.google.com/apis/library/tasks.googleapis.com).
1. First, go to the Google Developers Console to enable [Google Tasks](https://console.cloud.google.com/apis/library/tasks.googleapis.com)
2. The wizard will ask you to choose a project to manage your application. Select a project and select **Continue**.
3. Verify that your Google Tasks API was enabled and select **Go to credentials**.
4. Navigate to **APIs & Services** (left sidebar) > [Credentials](https://console.cloud.google.com/apis/credentials).
5. Click on the field on the left of the screen, **OAuth Consent Screen**.
6. Select **External** and **Create**.
7. Set the **App Name** (the name of the application asking for consent) to anything you want, for example to *Home Assistant*.
8. You then need to select a **Support email**. To do this, from the dropdown menu, select your email address.
9. You finally need to complete the section: **Developer contact information**. To do this, enter your email address (the same as above is fine).
10. Scroll to the bottom and select **Save and Continue**. You don't have to fill out anything else, or it may enable additional review.
11. You will then be automatically taken to the **Scopes** page. You do not need to add any scopes here, so select **Save and Continue** to move to the **Optional info** page. You do not need to add anything to the **Optional info** page, so select **Save and Continue**, which will take you to the **Summary** page. Select **Back to Dashboard**.
12. Select **OAuth consent screen** again and set **Publish Status** to **Production**. Otherwise, your credentials will expire every 7 days.
13. Make sure **Publishing status** is set to production.
14. Select **Credentials** in the menu on the left-hand side of the screen, then select **Create credentials** (at the top of the screen), then select **OAuth client ID**.
15. Set the Application type to **Web application** and give this credential set a name (like "Home Assistant Credentials").
16. Add `https://my.home-assistant.io/redirect/oauth` to **Authorized redirect URIs** then select **Create**. This is not a placeholder and is the URI that must be used.
17. You will then be presented with a pop-up saying **OAuth client created**, showing **Your Client ID** and **Your Client Secret**. Make a note of these (for example, copy and paste them into a text editor), as you will need them shortly. Once you have noted these strings, select **OK**. If you need to find these credentials again at any point, then navigate to **APIs & Services** > **Credentials**, and you will see **Home Assistant Credentials** (or whatever you named them in the previous step) under **OAuth 2.0 Client IDs**. To view both the **Client ID** and **Client secret**, select the pencil icon. This will take you to the settings page for these credentials, and the information will be on the right-hand side of the page.
18. Double-check that the **Google Tasks API** has been automatically enabled. To do this, select **Library** from the menu, then search for **Google Tasks API**. If it is enabled, you will see **API Enabled** with a green tick next to it. If it is not enabled, then enable it.
{% enddetails %}
{% include integrations/google_client_secret.md %}
{% include integrations/config_flow.md %}
The integration setup will next give you instructions to enter the [Application Credentials](/integrations/application_credentials/) (OAuth Client ID and Client Secret) and authorize Home Assistant to access your Google Tasks.
{% include integrations/google_oauth.md %}
{% details "OAuth and Device Authorization steps" %}
## Supported functionality
1. Continue through the steps of selecting the account you want to authorize.
### Entities
2. **NOTE**: You may get a message telling you that the app has not been verified and you will need to acknowledge that in order to proceed.
The Google Tasks integration provides the following entities.
3. You can now see the details of what you are authorizing Home Assistant to access with two options at the bottom. Select **Continue**.
#### To-do lists
4. The page will now display **Link account to Home Assistant?**, note **Your instance URL**. If this is not correct, refer to [My Home Assistant](/integrations/my). If everything looks good, select **Link Account**.
The integration will create a [to-do list entity](/integrations/todo) for every task list.
For example, a Google Tasks list named *My Tasks* then will have a Home Assistant
to-do list entity named *My Tasks*.
5. You may close the window, and return back to Home Assistant where you should see a **Success!** message from Home Assistant.
The Google Task integration can create, update, or delete items on a to-do list.
The to-do list entities support creating, updating, and deleting items on the to-do
list. A to-do list item supports the following fields:
{% enddetails %}
- **Item**: The item is the Google Task *Title* field.
- **Due date**: The Google Tasks Date. The time field in Google Tasks is not supported
by the Google Tasks API.
- **Description**: The Google Tasks *Details* field.
- **Status**: The Google Tasks *Completed* check box corresponds to the to-do list
status `needs_action` when not checked and `completed` when checked.
## Actions
The Google Tasks integration provides all actions supported by a to-do list entity
including actions for retrieving, creating, updating, and deleting to-do list items and the fields
described above. See the [To-do list: Actions](/integrations/todo#actions) documentation
for more details.
## Examples
### Low Battery Maintenance
You can use Google Tasks to help you automate battery maintenance. To tackle this
you can use this blueprint to send a notification with devices that have low
low battery level. The notification includes a button that can add an item to your
Google Tasks to-do list.
[Low Battery Notifications & Actions](https://community.home-assistant.io/t/low-battery-notifications-actions/653754)
## Data updates
The Google Tasks integration fetches task lists once initially, and creates a
to-do list for each task list. Data for each to-do list refreshed refreshed by
{% term polling %} every 30 minutes.
Updates to the to-do list in Home Assistant use the Google Tasks API and changes
are reflected immediately in Google Tasks. This will also refresh the to-do
list contents, {% term polling %} again for any new changes.
## Known limitations
There are some known Google Tasks API limitations that affect this integration:
- Only supports {% term polling %}. Updates in Google Tasks are not reflected immediately in Home Assistant.
- Only supports viewing or setting a task due date. A task due *time* is not supported.
## Troubleshooting
If you have an error with your credentials, you can delete them in the [Application Credentials](/integrations/application_credentials/) user interface.
### Can’t setup the integration
#### Symptom: “The OAuth client was not found.”
When trying to configure the integration, the Google OAuth flows shows the message *The OAuth client was not found* and *Error 401: invalid_client*.
##### Description
This means that the application credentials in Home Assistant do not match the
OAuth credentials in the Google Cloud console.
##### Resolution
To resolve this issue:
1. Follow the instructions in [Application Credentials](/integrations/application_credentials/#deleting-application-credentials) to remove any existing credentials.
1. Follow the steps above in the [Prerequisites](#prerequisites).
1. Follow the steps above in the [Configuration](#configuration).
#### Symptom: "Unable to access the Google API: Tasks API has not been used in project before or it is disabled"
Home Assistant fails to configure the integration with the error *Unable to access the
Google API: Google Tasks API has not been used in project before or it is disabled*.
##### Description
This means that Home Assistant is unable to use the Google Tasks API because it was not
enabled in the Google Cloud Console.
##### Resolution
Follow the steps above in the [Prerequisites](#prerequisites) to enable the Google Tasks API.
## Removing the integration
This integration follows standard integration removal. No extra steps are required.
{% include integrations/remove_device_service.md %}
You will be asked if you would like to remove [Application Credentials](/integrations/application_credentials/) which you can do if you no longer plan to use
Google Tasks with Home Assistant. You may want to also remove any credentials
in the Google Cloud Console, created above in the Prerequisites, if they are no
longer in use with any of your other Home Assistant integrations.