Home Assistant

Home Assistant is an open source platform for home automation. It provides integrations with many devices and supports a Home Assistent Rest API for reading and setting parameters.

Web service

If you do not have a running instance of Home Assistant you can deploy one on your cluster.

helm install homeassistant spacetime/homeassistant

Configuration

Open a web browser to http://[IP_ADDRESS]:8123 where the IP_ADDRESS is the the address of the server where kubernetes is installed. Follow the onboarding procedure. Go to the user profile and create a long lived access token.

Secret

Create a secret with name 'Homeassistant' and the following fields:

field	value
type	script
token	[TOKEN]
script	Homeassistant

Script

Create a script with a get and set function that calls the Home Assistant REST API. The Home Assistant API can be accessed via the name of the service in the cluster homeassistant.

const get = async (object, context) => {
  	let options = { 
      url: 'http://homeassistant:8123/api/states/' + object,
      headers: {
      'Authorization': 'Bearer ' + context.token
       }
    }
    let response = await fetch(options.url, options);
    let data = await response.json()
  	return data
}

const set = async (object, value, context) => {
  	let options = { 
      url: 'http://homeassistant:8123/api/services/climate/set_temperature',
      method: 'POST',
      body: JSON.stringify({"entity_id" : object, "temperature": value, "hvac_mode": "heat"}),
      headers: {
      'Content-Type': 'application/json',
      'Authorization': 'Bearer ' + context.token,
       }
    }
    let response = await fetch(options.url,options);
    let data = await response.json()
  	return data
}

Connector

Create a connector with name Homeassistant and data source Homeassistant. To read temperature from an object in Homeassistant with entity_id climate.zone1, add the following object mapping:

topic	value
home.hvac	climate.zone1

To read the temperature setting and actual temperature add the following key mapping:

key	value
thermostat	attributes.temperature
temperature	attributes.current_temperature