As the main integration does not work for me anymore, i won't be updating this. Feel free to fork, copy or ask to be a collaborator here if you want to maintain this.
It will not be a smooth countdown (It will jump some seconds), but it will always be done at the right time.
Make sure you have Home-Assistant Google home integration installed.
Since the integration is under active development, it is not yet added to HACS default repository, only manual installation is available for early testers
To install the integration follow HACS description to add custom repository. Provide https://github.com/DurgNomis-drol/google_home_timers_card as repository URL and select the "Lovelace" category. We recommend you select the latest release.
- Download googletimers-card.jsand right click and save it.
- Copy it into the 'www' folder. If 'www' does not exists in your config folder, then just create it.
- Add it to lovelace by going to lovelace Dashboardsand thenResources.
- and then input /local/googletimers-card.jsand change resourcetype tojavascript-module
- Restart Home Assistant or clear browser cache.
Follow step 1 -> 2 above and then add this to your ui-lovelace.yaml file.
lovelace:
  resources:
    - url: /local/googletimers-card.js
      type: moduleThe countdown is done client-side. This means that it will always fire at the correct time.
| Name | Type | Default | Supported options | Description | 
|---|---|---|---|---|
| type | string | Required | custom:googletimers-card | Type of the card. | 
| entity | string | Required | sensor.kitchen_timers | Has to be a timer sensor from google_home integration. | 
| title | string | Optional | Any string that you want | Name displayed in the header. Defaults to the entity name. | 
| icon | string | Optional | mdi:kitchen | Icon displayed in the header. Defaults to the entity icon. | 
| hide_header | boolean | false | trueorfalse | Whether to show the header or not. | 
| show_fire_time | boolean | false | trueorfalse | Whether to also show the time when it's done. | 
| alarms_entity | string | Optional | sensor.kitchen_alarms | To show alarms as well. | 
type: 'custom:googletimers-card'
entity: sensor.kitchen_timers
alarms_entity: sensor.kitchen_alarms
title: KitchenPlease open a issue if you have found a bug or even better make a PR if you can fix it 😄

