Thermostat Dark Card

English | 🌐 Supports: English, 中文 (Chinese Simplified), Slovenčina (Slovak)

A Nest-style thermostat card for Home Assistant with a round dial interface. Supports single and dual (heat/cool) setpoints, preset modes, and multiple themes.

Key features:

• Pure SVG rendering — lightweight, no images, optimized for low bandwidth
• Single and dual (heat/cool) temperature modes
• Ring drag interaction for setting temperature
• Predictive state feedback while editing
• Dark, light, and transparent themes
• Preset mode indicators (eco, away, home, sleep, boost)
• Responsive — scales to any card size

Installation

HACS (Recommended)

Or manually:

1. Open HACS in Home Assistant
2. Search for "Thermostat Dark Card"
3. Install and restart Home Assistant

Manual

1. Download thermostat-dark-card.js from the latest release
2. Place it in config/www/
3. Add the resource in Settings → Dashboards → Resources:
   • URL: /local/thermostat-dark-card.js
   • Type: JavaScript Module

Usage

type: custom:thermostat-dark-card
entity: climate.living_room

Configuration

UI Options

These are available in the visual card editor:

Option	Type	Default	Description
entity	string	required	Climate entity ID
name	string / false	entity name	Card title. Set to false to hide
hide_name	boolean	false	Hide the card title
theme	string	dark	dark, light, transparent, or glassy
step	number	from entity	Temperature step override (celsius only)
readonly	boolean	false	Disable all interaction (display only)
ambient_temperature	string	—	External temperature sensor entity ID
status_entity	string	—	Entity whose state is shown as text above temperature
show_power_toggle	boolean	true	Show power on/off button
show_preset_indicator	boolean	true	Show preset mode icon
pending	number	3	Seconds before committing temperature change

Advanced Options (YAML only)

For fine-tuning behavior — not exposed in UI:

Option	Type	Default	Description
idle_zone	number	0	Minimum gap between low/high targets in dual mode
range_min	number	from entity	Override minimum temperature
range_max	number	from entity	Override maximum temperature
colors	object	—	Custom color overrides (see below)
preset_icons	object	—	Map preset names to icons (see below)

Expert Options (use at your own risk)

Internal rendering parameters — changing these may break the dial appearance:

Option	Type	Default	Description
diameter	number	400	SVG viewBox size (all proportions are relative to this)
num_ticks	number	150	Number of tick marks on the ring
tick_degrees	number	300	Arc span of tick marks (degrees)
show_ticks	boolean	true	Show tick marks

Themes

• dark — Black/dark grey background (default)
• light — Light grey background with dark text
• transparent — No disc background, use with card-mod for custom backgrounds

Transparent theme example with a room photo:

type: custom:thermostat-dark-card
entity: climate.bedroom
theme: transparent
card_mod:
  style: |
    ha-card {
      background: url("/local/bedroom.jpg") center/cover no-repeat;
    }

Color Overrides

Override disc colors via YAML (not available in visual editor):

type: custom:thermostat-dark-card
entity: climate.living_room
colors:
  heating: "#ff5500"
  cooling: "#0088ff"
  idle: "#1a1a1a"
  off: "#444444"

Preset Icons

Map custom preset mode names to built-in icons:

type: custom:thermostat-dark-card
entity: climate.ecobee
preset_icons:
  vacation: eco
  night: sleep
  party: boost

Available icon names: eco, away, home, sleep, boost, comfort, activity

Built-in mappings (no config needed):

• eco, away → leaf
• home → house
• sleep → moon
• boost → flame
• comfort → sun
• activity → person

Unknown presets show no icon unless mapped via preset_icons.

External Temperature Sensor

Use a separate sensor for the ambient temperature display instead of the climate entity's built-in sensor:

type: custom:thermostat-dark-card
entity: climate.living_room
ambient_temperature: sensor.living_room_external_temp

Features

• Single and dual mode — Automatically adapts based on entity attributes
• Ring interaction — Drag on the tick ring to set temperature
• Chevron controls — Tap up/down arrows for precise adjustments
• Predictive feedback — Disc color fades to show predicted heating/cooling state while editing
• Preset indicators — Shows eco leaf, home, sleep, and other icons
• More-info dialog — Long-press (mobile) or right-click (desktop) opens the HA entity dialog
• Responsive — Scales to fit any card size

License

MIT

Support

If you find this card useful, consider buying me a coffee: