Climate

Eurotronic Comet Blue

eurotronic_cometblue

Built inLocal polling

The Eurotronic Comet Blue integration allows you to integrate Eurotronic Comet Blue (and similar) thermostats.

In Apple Home through HomeKit Bridge

What HomeKit Bridge makes of each kind of entity this integration creates, read from its source code. A device only gets the ones that apply to it.

Entity	Shows up as	Note
`climate`	Thermostat
`sensor`	Sensor (temperature)
`button`	Button (as a switch)

What people report

Comet Blue and rebrands work over Bluetooth, but discovery can mis-match unrelated Bluetooth devices.

Works4
Partly works1

Device	In Home Assistant	What they said	Source
Eurotronic Comet Blue	Works Local	Bluetooth thermostat; 0.5C steps, returns to schedule Saved copy Supported devices: Eurotronic Comet Blue; Sygonix HT100 BT; Xavax Hama; Lidl Silvercrest RT2000BT. Limitations: The devices only support temperature steps of 0.5°C and time steps of 10 minutes. If you manually change the target temperature or use presets, the thermostat returns to its programmed schedule at the next schedule change. If the thermostat is in holiday mode, you cannot reset it from Home Assistant. To reset it, press the MENU button on the thermostat until it resets. Excerpt saved from home-assistant.io on 2026-10-23.	Docs
Lidl Silvercrest RT2000BT	Works Local	Listed as supported in the docs Saved copy Supported devices: Eurotronic Comet Blue; Sygonix HT100 BT; Xavax Hama; Lidl Silvercrest RT2000BT. Limitations: The devices only support temperature steps of 0.5°C and time steps of 10 minutes. If you manually change the target temperature or use presets, the thermostat returns to its programmed schedule at the next schedule change. If the thermostat is in holiday mode, you cannot reset it from Home Assistant. To reset it, press the MENU button on the thermostat until it resets. Excerpt saved from home-assistant.io on 2026-10-23.	Docs
Sygonix HT100 BT	Works Local	Listed as supported in the docs Saved copy Supported devices: Eurotronic Comet Blue; Sygonix HT100 BT; Xavax Hama; Lidl Silvercrest RT2000BT. Limitations: The devices only support temperature steps of 0.5°C and time steps of 10 minutes. If you manually change the target temperature or use presets, the thermostat returns to its programmed schedule at the next schedule change. If the thermostat is in holiday mode, you cannot reset it from Home Assistant. To reset it, press the MENU button on the thermostat until it resets. Excerpt saved from home-assistant.io on 2026-10-23.	Docs
Xavax Hama thermostat	Works Local	Listed as supported in the docs Saved copy Supported devices: Eurotronic Comet Blue; Sygonix HT100 BT; Xavax Hama; Lidl Silvercrest RT2000BT. Limitations: The devices only support temperature steps of 0.5°C and time steps of 10 minutes. If you manually change the target temperature or use presets, the thermostat returns to its programmed schedule at the next schedule change. If the thermostat is in holiday mode, you cannot reset it from Home Assistant. To reset it, press the MENU button on the thermostat until it resets. Excerpt saved from home-assistant.io on 2026-10-23.	Docs
Eurotronic Comet Blue discovery	Partly works Local	Bluetooth matcher wrongly discovers LG TVs, Samsung TVs and JBL soundbar Saved copy The problem The `eurotronic_cometblue` Bluetooth discovery matcher incorrectly discovers unrelated Bluetooth devices as Eurotronic Comet Blue thermostats. The current matcher in manifest.json is: [code] The problem is that BlueZ reports this service UUID for unrelated devices on my system, including: LG webOS TV NANO813NA Samsung TVs JBL BAR 500 other Bluetooth devices As a result, Home Assistant shows these devices as discovered Eurotronic Comet Blue devices. Environment _Home Assistant OS: 18.2 Bluetooth adapter: Intel 8087:07dc Adapter MAC: 80:19:34:54:D5:E3 Bluetooth interface: hci0_ … Excerpt saved from GitHub on 2026-10-23.	Issue #179275 · 2026-08

Gathered from GitHub issues, pull requests, discussions and docs, and from r/homeassistant. These are individual reports, so check the linked thread and the date before you buy.

How it connects

Local polling

Talks to the device on your network, asking it for updates every so often.

Found automatically over

Bluetooth

Details

Installs (analytics)	16
Quality scale	Silver
Added in	Home Assistant 2026.5
Set up in the UI	Yes
Maintainers	@rikroe

Devices listed in its documentation

Eurotronic Comet Blue
Sygonix HT100 BT
Xavax Hama
Lidl Silvercrest RT2000BT

Limitations from the docs

The devices only support temperature steps of 0.5°C and time steps of 10 minutes.
If you manually change the target temperature or use presets, the thermostat returns to its programmed schedule at the next schedule change.
If the thermostat is in holiday mode, you cannot reset it from Home Assistant. To reset it, press the MENU button on the thermostat until it resets.

In ReReHome

Whatever HomeKit Bridge shares reaches Apple Home as normal HomeKit accessories behind your Home Assistant bridge, so ReReHome shows and controls them like any other.

Bridges get their own settings page listing the accessories behind them.