---
layout: page
title: "Google Calendar Event"
description: "Instructions how to use Google Calendars in Home Assistant."
date: 2015-05-08 17:15
sidebar: true
comments: false
sharing: true
footer: true
logo: google_calendar.png
ha_category: Calendar
ha_iot_class: "Cloud Polling"
ha_release: 0.33
---


This 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 component it will generate a new configuration file *google_calendars.yaml* that will contain information about all of the calendars you can see.

### {% linkable_title Prerequisites %}

Generate a Client ID and Client Secret on [Google Developers Console](https://console.developers.google.com/start/api?id=calendar).

1. Follow the wizard using the following information.
1. When it gets to the point of asking _Which API are you using?_ just click cancel.
1. Click on the tab 'OAuth consent screen'.
1. Set 'Product name shown to users' to anything you want. We suggest Home-Assistant.
1. Save this page. You don't have to fill out anything else there.
1. Click 'Create credentials' -> OAuth client ID.
1. Set the Application type to 'Other' and give this credential set a name then click Create.
1. Save the client ID and secret as you will need to put these in your configuration.yaml file.

### {% linkable_title Basic Setup %}

To integrate Google Calendar in Home Assistant, add the following section to your `configuration.yaml` file:

```yaml
# Example configuration.yaml entry
google:
  client_id: *Value_created_from_steps_above*
  client_secret: *Value_created_from_steps_above*
```

Configuration variables:

- **client_id** (*Required*): Use the value you generated in the Prerequisites stage.
- **client_secret** (*Required*): Use the value you generated in the Prerequisites stage.
- **track_new_calendar** (*Optional*): Will automatically generate a binary sensor when a new calendar is detected. The system scans for new calendars on startup. By default this is set to `True`.

The next steps will require you to have Home Assistant running.

After you have it running complete the Google authentication that pops up. It will give you a URL and a code to enter. This will grant your Home Assistant service access to all the Google Calendars that the account you authenticate with can read. This is a Read-Only view of these calendars.


### {% linkable_title Calendar Configuration %}
Editing `google_calendars.yaml`

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"
```

Variables:

- **cal_id**: The Google generated unique id for this calendar. **DO NOT CHANGE**

- **entities**: Yes, you can have multiple sensors for a calendar!

  - **device_id**: (*Required*): The name that all your automations/scripts will use to reference this device.
  
  - **name**: (*Required*): What is the name of your sensor that you'll see in the frontend.
  
  - **track**: (*Required*): Should we create a sensor `True` or ignore it `False`?
  
  - **search**: (*Optional*): If set will only trigger for matched events.
  
  - **offset**: (*Optional*): A set of characters that precede a number in the event title for designating a pre-trigger state change on the sensor. (Default: `!!`)
  
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.

**Note**: If you use a `#` sign for `search` then wrap the whole search term in quotes. Otherwise everything following the hash sign would be considered a YAML comment.


### {% linkable_title Sensor attributes %}

 - **offset_reached**: If set in the event title and parsed out will be `on`/`off` once the offset in the title in minutes is reached. So the title `Very important meeting #Important !!-10` would trigger this attribute to be `on` 10 minutes before the event starts.

 - **all_day**: `True`/`False` if this is an all day event. Will be `False` if there is no event found.

 - **message**: The event title with the `search` and `offset` values extracted. So in the above example for **offset_reached** the **message** would be set to `Very important meeting`

 - **description**: The event description.

 - **location**: The event Location.

 - **start_time**: Start time of event.

 - **end_time**: End time of event.