---
title: "Eurotronic Comet Blue"
description: "Eurotronic Comet Blue is a built-in integration for Home Assistant. It has 17 installs sharing analytics and works locally."
canonical: "https://vulpo.app/integrations/core/eurotronic-cometblue"
url: "https://vulpo.app/integrations/core/eurotronic-cometblue.md"
last-updated: "2026-10-22"
version: "1.4"
---

# Eurotronic Comet Blue

> Eurotronic Comet Blue is a built-in integration for Home Assistant. It has 17 installs sharing analytics and works locally.

Eurotronic Comet Blue is a built-in integration for controlling Comet Blue radiator thermostats locally. It adds a climate entity for each device, along with sensors, a button to sync the device time, and number entities for the comfort setpoint, eco setpoint and setpoint offset. Actions can read or write the heating schedule on one or several devices, and days left out of a new schedule stay unchanged. Another action sets holiday or away mode. Home Assistant finds devices on the network and offers to add them, and setup in the UI asks for the 6-digit device PIN.

Automatic summary of Home Assistant's source code. Something wrong? [Get in touch](https://vulpo.app/contact)

[Open in My Home Assistant](https://my.home-assistant.io/redirect/config_flow_start/?domain=eurotronic_cometblue)

## Supports

- **Works locally**: Talks to your devices on your own network. No vendor cloud in between.
- **Set up in the UI**: Add it in Settings, Devices and services. Nothing to download.
- **Found by itself**: Home Assistant spots it on the network and offers to add it.
- **Adds new devices**: New devices show up without setting it up again.
- **Bronze quality**: Home Assistant's own rating of its code and setup experience.
- **Updated with Home Assistant**: Ships and updates with every Home Assistant release.

## Setting it up

Home Assistant usually finds it on the network and offers to add it. It can also be added by hand under Settings, Devices and services.

### Confirm the device

- **PIN code**: 6-digit device PIN

### Choose a device

- **Discovered devices**: Select device to continue.

Texts from Home Assistant's source code, [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0).

## Entities

- **Buttons**: Sync time
- **Numbers**: Comfort setpoint, Eco setpoint, Setpoint offset

## Actions

- **Get schedule**: Retrieves the configured heating time ranges of one or multiple devices.
- **Set holiday/away mode**: Sets holiday/away mode on one or multiple devices.
  Fields: From, Temperature, To
- **Set schedule**: Sets the configured heating time ranges of one or multiple devices. Days not included will be left unchanged.
  Fields: Friday, Monday, Saturday, Sunday, Thursday, Tuesday, Wednesday

## At a glance

- Kind: Built-in integration
- Category: [Climate](https://vulpo.app/integrations/category/climate.md)
- Number: 17 installs sharing analytics
- Connection: Works locally
- Upkeep: Part of Home Assistant
- Needs: Built into Home Assistant
- Quality scale: Bronze quality scale
- Domain: `eurotronic_cometblue`
- Source: <https://www.home-assistant.io/integrations/eurotronic_cometblue/>

In Vulpo: Climate card, Button card, Chart card, Apple Watch, Climate Live Activity (Pro)

[Widgets & Live Activities in Vulpo](https://vulpo.app/features/widgets-and-live-activities)

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation. [About these numbers](https://vulpo.app/integrations/about)

Last updated 2026-10-22. Source: https://vulpo.app/integrations/core/eurotronic-cometblue

---

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