home-assistant.io/source/components/modbus.markdown

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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:

# Example configuration.yaml entry
modbus:
  type: serial
  method: rtu
  port: /dev/ttyUSB0
  baudrate: 9600
  stopbits: 1
  bytesize: 8
  parity: N

sensor:
  platform: modbus
  slave: 1
  registers:
    16:
      name: My integer sensor
        unit: C
    24:
      bits:
        0:
          name: My boolean sensor
        2:
          name: My other boolean sensor
    coils:
        0:
            name: My coil switch

switch:
  platform: modbus
  slave: 1
  registers:
    24:
      bits:
        0:
          name: My switch
        2:
          name: My other switch