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| layout | title | description | date | sidebar | comments | sharing | footer |
|---|---|---|---|---|---|---|---|
| page | Modbus | Instructions how to integrate Modbus within Home Assistant. | 2015-04-25 9:16 | false | false | true | true |
[Modbus](http://www.modbus.org/) is a serial communication protocol to control PLCs (Programmable logic controller). It currently supports sensors and switches which can be controlled over serial, TCP, and UDP connections.
To add modbus to your installation, add the following to your configuration.yaml file:
For a network connection:
#Modbus TCP modbus: type: tcp host: IP_ADDRESS port: 2020
Configuration variables:
- **type** (*Required*): Type of the connection to Modebus.
- **host** (*Required*): The IP address of your router, eg. 192.168.1.1.
- **port** (*Required*): The port for the comminication.
For a serial connection:
```yaml
# Example configuration.yaml entry
modbus:
type: serial
method: rtu
port: /dev/ttyUSB0
baudrate: 9600
stopbits: 1
bytesize: 8
parity: N
Configuration variables:
- type (Required): Type of the connection to Modebus.
- method (Required): Method of the connection to Modbus.
- port (Required): The port where your Modbus device is connected to your Home Assistant host.
- baudrate (Required): The speed for the serial connection.
- stopbits (Required): The stopbits for the serial connection.
- bytesize (Required): The bytesize for the serial connection.
- parity (Required): The parity for the serial connection.