Climate

Kamstrup 403

golles/ha-kamstrup_403 · vv3.2.2

HACSLocal polling

Custom component that integrates the Kamstrup 403 heating system into Home Assistant. This component does also support a few other heating systems

Documentation Source code

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
`sensor`	Sensor (temperature, humidity, air quality…)

What people report

Kamstrup Multical heat meters 402, 403, 601, 602 and 603 work; users confirmed the 601 and 602 and the polling interval became configurable.

Works6

Device	In Home Assistant	What they said	Source
Kamstrup MC66C	Works	Listed as supported Saved copy Supported devices: Meter; Kamstrup 403; Kamstrup 402; Kamstrup 601; Kamstrup 602; Kamstrup 603; Kamstrup MC66C. Excerpt saved from the README on 2026-10-23.	README
Kamstrup Multical 402	Works	Listed as supported Saved copy Supported devices: Meter; Kamstrup 403; Kamstrup 402; Kamstrup 601; Kamstrup 602; Kamstrup 603; Kamstrup MC66C. Excerpt saved from the README on 2026-10-23.	README
Kamstrup Multical 403	Works	Primary supported meter Saved copy Supported devices: Meter; Kamstrup 403; Kamstrup 402; Kamstrup 601; Kamstrup 602; Kamstrup 603; Kamstrup MC66C. Excerpt saved from the README on 2026-10-23.	README
Kamstrup Multical 601	Works	User confirmed; 1.2.0 added configurable scan interval Saved copy … instructions? - [X] I have read the README. ### The request Firstly, I would also like to report a new device working with the integration. In my case it is Kamstrup Multical 601. Thank you for this integration! Secondly, can you please specify what's the read frequency and ideally make it a configurable value? ### Additional information From my research, I understand that reading the meter drains its battery (~15 min of lifetime reduction per read with brand new battery lasting 10 years without readouts). It'd be good to have control over it if ones device is battery powered. Excerpt saved from GitHub on 2026-10-23.	Issue #14 · 2022-06
Kamstrup Multical 602	Works	Works out of the box per user Saved copy … instructions? - [X] I have read the README. ### The request Not really a feature request. more like a big thank you. I was searching for a way to integrate my Kamstrup multical 602 and just gave your integration a try. It works out of the box!!! So my only suggestion is maybe add a "supported devices" list to the readme.md, and or remove 403 from the name of the integration. ### Additional information _No response_ Excerpt saved from GitHub on 2026-10-23.	Issue #10 · 2022-05
Kamstrup Multical 603	Works	Listed as supported Saved copy Supported devices: Meter; Kamstrup 403; Kamstrup 402; Kamstrup 601; Kamstrup 602; Kamstrup 603; Kamstrup MC66C. Excerpt saved from the README on 2026-10-23.	README

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.

Details

Installs (analytics)	82 (0.01%)
GitHub stars	91
Latest version	v3.2.2 (2026-10-19)
Set up in the UI	Yes
Maintainers	@golles
License	MIT

Devices listed in its README

Meter
Kamstrup 403
Kamstrup 402
Kamstrup 601
Kamstrup 602
Kamstrup 603
Kamstrup MC66C

Notable forks

Forks with stars, or with code pushed at least 90 days after the original’s last push. Useful when the original goes quiet.

Fork	Stars	Last push	Description
jukkapirinen/ha-kamstrup_382	★ 3	2025-02-17	Custom component that integrates the Kamstrup 382 power meter into Home Assistant.

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.

Sources

Documentation: https://github.com/golles/ha-kamstrup_403/blob/main/README.md
Source code: https://github.com/golles/ha-kamstrup_403
Issues: https://github.com/golles/ha-kamstrup_403/issues
HACS: https://hacs.xyz