--- title: "Google Calendar Event" description: "Instructions on how to use Google Calendars in Home Assistant." ha_category: - Calendar ha_iot_class: Cloud Polling ha_release: 0.33 ha_domain: google --- The `google` calendar platform allows you to connect to your [Google Calendars](https://calendar.google.com) and generate binary sensors. The sensors created can trigger based on any event on the calendar or only for matching events. When you first setup this integration it will generate a new configuration file `google_calendars.yaml` in your configuration directory that will contain information about all of the calendars you can see. It also exposes a service to add an event to one of your Google Calendars. ## Prerequisites Generate a Client ID and Client Secret on [Google Developers Console](https://console.developers.google.com/start/api?id=calendar). 1. First go to the [Google Developers Console](https://console.developers.google.com/start/api?id=calendar) 1. The wizard will ask you to choose a project to manage your application. Select a project and click continue. 1. Verify that your calendar API was enabled and click 'Go to credentials' 1. When it gets to the Page titled _Add credentials to your project_ just click cancel. 1. Navigate to APIs & Services (left sidebar) > Credentials 1. Click on the field on the right of the screen, 'CONFIGURE CONSENT SCREEN', select "External" and create. 1. Set the 'Application Name' (the name of the application asking for consent) to anything you want. We suggest "Home-Assistant". 1. Scroll to the bottom and save this page. You don't have to fill out anything else here. 1. Click on the menu item, Credentials, then click 'Create credentials' > OAuth client ID. 1. Set the Application type to 'Other' (if not present, choose 'TV and Limited Input') and give this credential set a name (like "Home Assistant Credentials") then click 'Create'. 1. You can now copy the client ID and client secret from the page that follows into a text editor temporarily as you will need to put these in your `configuration.yaml` file. 1. Click on the menu item, Library, then search for "Google Calendar API" and enable it (if it isn't already enabled automatically through this process). 1. In order to access your client ID and client secret you can click the navigation menu (hamburger menu) in the top left corner navigate to 'APIs & Services' > Credentials and your credentials will appear under 'OAuth 2.0 Client IDs' with the name you created earlier 1. Clicking on the name will reveal both the client ID and client secret that you will add to your `configuration.yaml`file below If you will later be adding more scopes than just the "Google Calendar API" to the OAuth for this application, you will need to delete your token file under your Home Assistant Profile. You will lose your refresh token due to the re-authenticating to add more API access. It's recommended to use different authorizations for different pieces of Google. ## Troubleshooting If you are trying to switch to a new Google account then you would run into the following error message. Make sure to delete the existing **.google.token** file from your `config` folder and restart Home Assistant to try again. 'oauth2client.client.HttpAccessTokenRefreshError: deleted_client: The OAuth client was deleted' ## Configuration To integrate Google Calendar in Home Assistant, add the following section to your `configuration.yaml` file: ```yaml # Example configuration.yaml entry google: client_id: YOUR_CLIENT_ID client_secret: YOUR_CLIENT_SECRET ``` {% configuration %} client_id: description: Use the client ID you generated in the Prerequisites stage. required: true type: string client_secret: description: Use the client secret you generated in the Prerequisites stage. required: true type: string track_new_calendar: description: > Will automatically generate a binary sensor when a new calendar is detected. The system scans for new calendars only on startup. required: false type: boolean default: true {% endconfiguration %} The next time you run or restart Home Assistant, you should find a new notification (the little bell icon in the lower left corner). Click on that notification it will give you a link and an authentication code. Click on that link to open a Google website where you should enter the code found in the notification. This will grant your Home Assistant service read-only access to all the Google Calendars that the account you authenticate with can read. ## Calendar Configuration Editing the `google_calendars.yaml` file. A basic entry for a single calendar looks like: ```yaml - cal_id: "*****@group.calendar.google.com" entities: - device_id: test_everything name: Give me everything track: true - cal_id: "*****@group.calendar.google.com" entities: - device_id: test_important name: Important Stuff track: true search: "#Important" offset: "!!" - device_id: test_unimportant name: UnImportant Stuff track: true search: "#UnImportant" ``` {% configuration %} cal_id: description: The Google *generated* unique id for this calendar. required: true type: string default: "**DO NOT CHANGE THE DEFAULT VALUE**" entities: description: Yes, you can have multiple sensors for a calendar! required: true type: list keys: device_id: description: > The name that all your automations/scripts will use to reference this device. required: true type: string name: description: What is the name of your sensor that you'll see in the frontend. required: true type: string track: description: "Should we create a sensor `true` or ignore it `false`?" required: true type: boolean default: true search: description: If set will only trigger for matched events. required: false type: string offset: description: > A set of characters that precede a number in the event title for designating a pre-trigger state change on the sensor. This should be in the format of HH:MM or MM. required: false type: string default: "!!" ignore_availability: description: "Should we respect `free`/`busy` flags?" required: false type: boolean default: true max_results: description: "Max number of entries to retrieve" required: false type: integer default: 5 {% endconfiguration %} From this we will end up with the binary sensors `calendar.test_unimportant` and `calendar.test_important` which will toggle themselves on/off based on events on the same calendar that match the search value set for each. You'll also have a sensor `calendar.test_everything` that will not filter events out and always show the next event available. But what if you only wanted it to toggle based on all events? Just leave out the *search* parameter.