---
title: ''
description: Telegraf plugin for collecting metrics from KNX
url: https://docs.influxdata.com/telegraf/v1/input-plugins/knx_listener/
estimated_tokens: 939
product: Telegraf Enterprise
version: v1
publisher: InfluxData
canonical: https://docs.influxdata.com/telegraf/v1/input-plugins/knx_listener/
date: '2026-05-21T20:10:18+02:00'
lastmod: '2026-05-21T20:10:18+02:00'
---

==========

* Telegraf v1.19.0+

[Plugin source](https://github.com/influxdata/telegraf/tree/v1.39.1/plugins/inputs/knx_listener/)[Download configuration](https://raw.githubusercontent.com/influxdata/telegraf/refs/tags/v1.39.1/plugins/inputs/knx_listener/sample.conf)

# KNX Input Plugin

This service plugin listens for messages on the [KNX home-automation bus](https://www.knx.org)by connecting via a KNX-IP interface. Information about supported KNX
datapoint-types can be found at the underlying [`knx-go` project](https://github.com/vapourismo/knx-go).

**Introduced in:** Telegraf v1.19.0**Tags:** iot**OS support:** all

## Service Input

This plugin is a service input. Normal plugins gather metrics determined by the
interval setting. Service plugins start a service to listen and wait for
metrics or events to occur. Service plugins have two key differences from
normal plugins:

1. The global or plugin specific `interval` setting may not apply
2. The CLI options of `--test`, `--test-wait`, and `--once` may not produce
   output for this plugin

## Global configuration options

Plugins support additional global and plugin configuration settings for tasks
such as modifying metrics, tags, and fields, creating aliases, and configuring
plugin ordering. See [CONFIGURATION.md](/telegraf/v1/configuration/#plugins) for more details.

## Configuration

```toml
# Listener capable of handling KNX bus messages provided through a KNX-IP Interface.
[[inputs.knx_listener]]
  ## Type of KNX-IP interface.
  ## Can be either "tunnel_udp", "tunnel_tcp", "tunnel" (alias for tunnel_udp) or "router".
  # service_type = "tunnel"

  ## Address of the KNX-IP interface.
  service_address = "localhost:3671"

  ## Measurement definition(s)
  # [[inputs.knx_listener.measurement]]
  #   ## Name of the measurement
  #   name = "temperature"
  #   ## Datapoint-Type (DPT) of the KNX messages
  #   dpt = "9.001"
  #   ## Use the string representation instead of the numerical value for the
  #   ## datapoint-type and the addresses below
  #   # as_string = false
  #   ## List of Group-Addresses (GAs) assigned to the measurement
  #   addresses = ["5/5/1"]

  # [[inputs.knx_listener.measurement]]
  #   name = "illumination"
  #   dpt = "9.004"
  #   addresses = ["5/5/3"]
```

### Related tools

* [knx-telegraf-config-generator](https://github.com/svsool/knx-telegraf-config-generator): generates a Telegraf
  configuration from a KNX project file

### Measurement configurations

Each measurement contains only one datapoint-type (DPT) and assigns a list of
addresses to this measurement. You can, for example group all temperature sensor
messages within a “temperature” measurement. However, you are free to split
messages of one datapoint-type to multiple measurements.

> [!Important]
> You should not assign a group-address (GA) to multiple measurements!

## Metrics

Received KNX data is stored in the named measurement as configured above using
the “value” field. Additional to the value, there are the following tags added
to the datapoint:

* `groupaddress`: KNX group-address corresponding to the value
* `unit`: unit of the value
* `source`: KNX physical address sending the value

To find out about the datatype of the datapoint please check your KNX project,
the KNX-specification or the “knx-go” project for the corresponding DPT.

## Example Output

This section shows example output in Line Protocol format.

```text
illumination,groupaddress=5/5/4,host=Hugin,source=1.1.12,unit=lux value=17.889999389648438 1582132674999013274
temperature,groupaddress=5/5/1,host=Hugin,source=1.1.8,unit=°C value=17.799999237060547 1582132663427587361
windowopen,groupaddress=1/0/1,host=Hugin,source=1.1.3 value=true 1582132630425581320
```