home-assistant.io/source/_components/binary_sensor.knx.markdown
2018-02-05 08:24:20 +01:00

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---
layout: page
title: "KNX Binary Sensor"
description: "Instructions how to setup the KNX binary sensors within Home Assistant."
date: 2016-07-13 07:00
sidebar: true
comments: false
sharing: true
footer: true
logo: knx.png
ha_category: Binary Sensor
ha_release: 0.24
ha_iot_class: "Local Polling"
---
The `knx` sensor platform allows you to monitor [KNX](http://www.knx.org) binary sensors.
The `knx` component must be configured correctly, see [KNX Component](/components/knx).
```yaml
# Example configuration.yaml entry
binary_sensor:
- platform: knx
name: "Entrance.Motion.Sensor"
address: '6/0/2'
device_class: 'motion'
#significant_bit: 2
#reset_after: 100
```
Configuration variables:
- **name** (*Optional*): A name for this device used within Home Assistant.
- **address**: KNX group address of the binary sensor.
- **device_class** (Optional): HASS device class e.g. "motion".
- **significant_bit** (Optional): Specify which significant bit of the KNX value should be used. Default is 1.
- **reset_after** (Optional): Reset back to OFF state after specified milliseconds.
You can also attach actions to binary sensors (e.g., to switch on a light when a switch was pressed). In this example, one light is switched on when the button was pressed once and two others when the button was pressed a second time.
```yaml
# Example configuration.yaml entry
binary_sensor:
- platform: knx
name: Livingroom.3Switch3
address: '5/0/26'
automation:
- counter: 1
hook: 'on'
action:
- entity_id: light.hue_color_lamp_1
service: homeassistant.turn_on
- counter: 2
hook: 'on'
action:
- entity_id: light.hue_bloom_1
service: homeassistant.turn_on
- entity_id: light.hue_bloom_2
service: homeassistant.turn_on
```
Configuration variables:
- **name** (*Optional*): A name for this device used within Home Assistant.
- **counter** (*Optional*): Set to 2 if your only want the action to be executed if the button was pressed twice. To 3 for three times button pressed. Defaults to 1.
- **hook** (Optional): Indicates if the automation should be executed on what state of the binary sensor. Values: "on" or "off". Defaults to "on".
- **action**: Specify a list of actions analog to the [automation rules](/docs/automation/action/).