---
layout: page
title: "Push Notifications"
description: "Instructions how to use the HTML5 push notifications platform from Home Assistant."
date: 2016-08-17 21:58
sidebar: true
comments: false
sharing: true
footer: true
logo: html5.png
ha_category: Notifications
ha_release: 0.27
---

The `html5` notification platform enables you to receive push notifications to Chrome or Firefox, no matter where you are in the world. `html5` also supports Chrome and Firefox on Android, which enables native-app-like integrations without actually needing a native app.

To enable this platform, add the following lines to your `configuration.yaml` file:

```yaml
# Example configuration.yaml entry
notify:
  - name: NOTIFIER_NAME
    platform: html5
    gcm_api_key: 'gcm-sender-key'
    gcm_sender_id: 'gcm-sender-id'
```

Configuration variables:

- **name** (*Optional*): Setting the optional parameter `name` allows multiple notifiers to be created. The default value is `notify`. The notifier will bind to the service `notify.NOTIFIER_NAME`.
- **gcm_api_key** (*Required if pushing to Chrome*): The API key provided to you by Google for Google Cloud Messaging (GCM). Required to push to Chrome.
- **gcm_sender_id** (*Required if pushing to Chrome*): The sender ID provided to you by Google for Google Cloud Messaging (GCM). Required to push to Chrome.

### {% linkable_title Getting ready for Chrome %}

1. Create new project at [https://console.cloud.google.com/home/dashboard](https://console.cloud.google.com/home/dashboard).
2. Go to [https://console.cloud.google.com/apis/credentials/domainverification](https://console.cloud.google.com/apis/credentials/domainverification) and verify your domain.
3. After that, go to [https://console.firebase.google.com](https://console.firebase.google.com) and select import Google project, select the project you created.
4. Then, click the cogwheel on top left and select "Project settings".
5. Select 'Cloud Messaging' tab, listed beneath Project Credentials will be your 152 character 'Server Key' and 12 digit ID 'Sender ID'.

#### {% linkable_title Verify your domain with Hass.io %}

1. For verifying your domain you need to download a file in step 2.
2. Create a dictionary named "www" in you Hass.io configuration dictionary.
3. Place the file (something like this: google*.html) in the "www" directory.
4. You can open it by going to **https://yourdomain/local/exact_file_name.html**
5. Proceed with step 3.

### {% linkable_title Requirements %}

The `html5` platform can only function if all of the following requirements are met:
(On Hass.io these requirements are already met.)

* You are using Chrome and/or Firefox on any desktop platform, ChromeOS or Android.
* Your Home Assistant instance is exposed to the world.
* If using a proxy, HTTP basic authentication must be off for registering or unregistering for push notifications. It can be re-enabled afterwards.
* `pywebpush` must be installed. `libffi-dev`, `libpython-dev`, and `libssl-dev` must be installed prior to `pywebpush` (i.e. `pywebpush` probably won't automatically install).
* You have configured SSL for your Home Assistant. It doesn't need to be configured in Home Assistant though, i.e. you can be running [NGINX](/ecosystem/nginx/) in front of Home Assistant and this will still work. The certificate must be trustworthy (i.e. not self signed).
* You are willing to accept the notification permission in your browser.


### {% linkable_title Setting up %}

Assuming you have already added the platform to your configuration:

1. Open Home Assistant in Chrome or Firefox.
2. Assuming you have met all the [requirements](#requirements) above, you should see a new slider in the sidebar labeled Push Notifications.
3. Slide it to the on position.
4. Within a few seconds you should be prompted to allow notifications from Home Assistant.
5. Assuming you accept, that's all there is to it!
6. (Optional, but highly recommended!) Open the `html5_push_registrations.conf` file in your configuration directory. You will see a new entry for the browser you just added. Rename it from `unnamed device` to a name of your choice, which will make it easier to identify later. _Do not change anything else in this file!_ You need to restart Home Assistant after making any changes to the file.


### {% linkable_title Usage %}

The `html5` platform accepts a standard notify payload. However, there are also some special features built in which you can control in the payload.

Any JSON examples below can be [converted to YAML](https://www.json2yaml.com/) for automations.

#### {% linkable_title Actions %}

Chrome supports notification actions, which are configurable buttons that arrive with the notification and can cause actions on Home Assistant to happen when pressed. You can send [up to 2 actions](https://cs.chromium.org/chromium/src/third_party/WebKit/public/platform/modules/notifications/WebNotificationConstants.h?q=maxActions&sq=package:chromium&dr=CSs&l=14).

```json
{
  "message": "Anne has arrived home",
  "data": {
    "actions": [
      {
        "action": "open",
        "icon": "/static/icons/favicon-192x192.png",
        "title": "Open Home Assistant"
      },
      {
        "action": "open_door",
        "title": "Open door"
      }
    ]
  }
}
```

#### {% linkable_title Data %}

Any parameters that you pass in the notify payload that aren't valid for use in the HTML5 notification (`actions`, `badge`, `body`, `dir`, `icon`, `image`, `lang`, `renotify`, `requireInteraction`, `tag`, `timestamp`, `vibrate`) will be sent back to you in the [callback events](#automating-notification-events).

```json
{
  "title": "Front door",
  "message": "The front door is open",
  "data": {
    "my-custom-parameter": "front-door-open"
  }
}
```

#### {% linkable_title Tag %}

By default, every notification sent has a randomly generated UUID (v4) set as its _tag_ or unique identifier. The tag is unique to the notification, _not_ to a specific target. If you pass your own tag in the notify payload you can replace the notification by sending another notification with the same tag. You can provide a `tag` like so:

```json
{
  "title": "Front door",
  "message": "The front door is open",
  "data": {
    "tag": "front-door-notification"
  }
}
```

Example of adding a tag to your notification. This won't create new notification if there already exists one with the same tag.

```yaml
  - alias: Push/update notification of sensor state with tag
    trigger:
      - platform: state
        entity_id: sensor.sensor
    action:
      service: notify.html5
      data_template:
        message: "Last known sensor state is {% raw %}{{ states('sensor.sensor') }}{% endraw %}."
      data:
        data:
          tag: 'notification-about-sensor'
```

#### {% linkable_title Targets %}

If you do not provide a `target` parameter in the notify payload a notification will be sent to all registered targets as listed in `html5_push_registrations.conf`. You can provide a `target` parameter like so:

```json
{
  "title": "Front door",
  "message": "The front door is open",
  "target": "unnamed device"
}
```

`target` can also be a string array of targets like so:

```json
{
  "title": "Front door",
  "message": "The front door is open",
  "target": ["unnamed device", "unnamed device 2"]
}
```

#### {% linkable_title Overrides %}

You can pass any of the parameters listed [here](https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration/showNotification#Parameters) in the `data` dictionary. Please note, [Chrome specifies](https://cs.chromium.org/chromium/src/third_party/WebKit/public/platform/modules/notifications/WebNotificationConstants.h?q=maxActions&sq=package:chromium&dr=CSs&l=21) that the maximum size for an icon is 320px by 320px, the maximum `badge` size is 96px by 96px and the maximum icon size for an action button is 128px by 128px.

#### {% linkable_title URL %}

You can provide a URL to open when the notification is clicked by putting `url` in the data dictionary like so:

```json
{
  "title": "Front door",
  "message": "The front door is open",
  "data": {
    "url": "https://google.com"
  }
}
```

If no URL or actions are provided, interacting with a notification will open your Home Assistant in the browser. You can use relative URLs to refer to Home Assistant, i.e. `/map` would turn into `https://192.168.1.2:8123/map`.

### {% linkable_title Automating notification events %}

During the lifespan of a single push notification, Home Assistant will emit a few different events to the event bus which you can use to write automations against.

Common event payload parameters are:

| Parameter | Description                                                                                                                                                                                                                                                    |
|-----------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `action`  | The `action` key that you set when sending the notification of the action clicked. Only appears in the `clicked` event.                                                                                                                                        |
| `data`    | The data dictionary you originally passed in the notify payload, minus any parameters that were added to the HTML5 notification (`actions`, `badge`, `body`, `dir`, `icon`, `image`, `lang`, `renotify`, `requireInteraction`, `tag`, `timestamp`, `vibrate`). |
| `tag`     | The unique identifier of the notification. Can be overridden when sending a notification to allow for replacing existing notifications.                                                                                                                        |
| `target`  | The target that this notification callback describes.                                                                                                                                                                                                          |
| `type`    | The type of event callback received. Can be `received`, `clicked` or `closed`.                                                                                                                                                                                 |

You can use the `target` parameter to write automations against a single `target`. For more granularity, use `action` and `target` together to write automations which will do specific things based on what target clicked an action.

#### {% linkable_title received event %}

You will receive an event named `html5_notification.received` when the notification is received on the device.

```yaml
- alias: HTML5 push notification received and displayed on device
  trigger:
    platform: event
    event_type: html5_notification.received
```

#### {% linkable_title clicked event %}

You will receive an event named `html5_notification.clicked` when the notification or a notification action button is clicked. The action button clicked is available as `action` in the `event_data`.

```yaml
- alias: HTML5 push notification clicked
  trigger:
    platform: event
    event_type: html5_notification.clicked
```

or

```yaml
- alias: HTML5 push notification action button clicked
  trigger:
    platform: event
    event_type: html5_notification.clicked
    event_data:
      action: open_door
```

#### {% linkable_title closed event %}

You will receive an event named `html5_notification.closed` when the notification is closed.

```yaml
- alias: HTML5 push notification clicked
  trigger:
    platform: event
    event_type: html5_notification.closed
```

### {% linkable_title Making notifications work with NGINX proxy %}

If you use [NGINX](/ecosystem/nginx/) as an proxy with authentication in front of your Home Assistant instance, you may have trouble with receiving events back to Home Assistant. It's because of authentication token that cannot be passed through the proxy.

To solve the issue put additional location into your nginx site's configuration:

```bash
location /api/notify.html5/callback {
    if ($http_authorization = "") { return 403; }
    allow all;
    proxy_pass http://localhost:8123;
    proxy_set_header Host $host;
    proxy_redirect http:// https://;
}
```

This rule check if request have `Authorization` HTTP header and bypass the htpasswd (if you use one).

If you still have the problem, even with mentioned rule, try to add this code:
```bash
    proxy_set_header Authorization $http_authorization;
    proxy_pass_header Authorization;
```
