home-assistant.io/source/_components/switch.modbus.markdown
2016-09-19 14:50:02 +02:00

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---
layout: page
title: "Modbus Switch"
description: "Instructions how to integrate Modbus switches into Home Assistant."
date: 2015-08-30 23:38
sidebar: true
comments: false
sharing: true
footer: true
logo: modbus.png
ha_category: Switch
ha_release: pre 0.7
---
The `modbus` switch platform allows you to control [Modbus](http://www.modbus.org/) coils.
To use your Modbus switches in your installation, add the following to your `configuration.yaml` file:
```yaml
# Example configuration.yml entry
switch:
platform: modbus
slave: 1
coils:
- name: Switch1
slave: 1
coil: 13
- name: Switch2
slave: 2
coil: 14
```
Configuration variables:
- **coils** (*Optional*): A list of relevant coils to read from/write to
- **slave** (*Required*): The number of the slave (can be omitted for tcp and udp Modbus).
- **name** (*Required*): Name of the sensor
- **coil** (*Required*): Coil number