Automation in Code

Example component to target an entity_id to:

  • turn it on at 7AM in the morning
  • turn it on if anyone comes home and it is off
  • turn it off if all lights are turned off
  • turn it off if all people leave the house
  • offer a service to turn it on for 10 seconds

To set it up, add the following lines to your configuration.yaml file:

# Example configuration.yaml entry

Configuration variables:

  • target (Required): TARGET_ENTITY should be one of your devices that can be turned on and off, e.g., a light or a switch. Example value could be light.Ceiling or switch.AC (if you have these devices with those names).

Create the file <config dir>/custom_components/ and copy paste the content below:

Example of a custom component.
import time
import logging

from homeassistant.const import STATE_HOME, STATE_NOT_HOME, STATE_ON, STATE_OFF
from homeassistant.helpers import validate_config
from homeassistant.helpers.event_decorators import \
    track_state_change, track_time_change
from homeassistant.helpers.service import service
import homeassistant.components as core
from homeassistant.components import device_tracker
from homeassistant.components import light

# The domain of your component. Should be equal to the name of your component.
DOMAIN = "example"

# List of component names (string) your component depends upon.
# We depend on group because group will be loaded after all the components that
# initialize devices have been setup.
DEPENDENCIES = ['group', 'device_tracker', 'light']

# Configuration key for the entity id we are targeting.
CONF_TARGET = 'target'

# Variable for storing configuration parameters.

# Name of the service that we expose.

# Shortcut for the logger
_LOGGER = logging.getLogger(__name__)

def setup(hass, config):
    """Setup example component."""
    global TARGET_ID

    # Validate that all required config options are given.
    if not validate_config(config, {DOMAIN: [CONF_TARGET]}, _LOGGER):
        return False


    # Validate that the target entity id exists.
    if hass.states.get(TARGET_ID) is None:
        _LOGGER.error("Target entity id %s does not exist",

        # Tell the bootstrapper that we failed to initialize and clear the
        # stored target id so our functions don't run.
        TARGET_ID = None
        return False

    # Tell the bootstrapper that we initialized successfully.
    return True

def track_devices(hass, entity_id, old_state, new_state):
    """Called when the group.all devices change state."""
    # If the target id is not set, return
    if not TARGET_ID:

    # If anyone comes home and the entity is not on, turn it on.
    if new_state.state == STATE_HOME and not core.is_on(hass, TARGET_ID):

        core.turn_on(hass, TARGET_ID)

    # If all people leave the house and the entity is on, turn it off.
    elif new_state.state == STATE_NOT_HOME and core.is_on(hass, TARGET_ID):

        core.turn_off(hass, TARGET_ID)

@track_time_change(hour=7, minute=0, second=0)
def wake_up(hass, now):
    """Turn light on in the morning.

    Turn the light on at 7 AM if there are people home and it is not already
    if not TARGET_ID:

    if device_tracker.is_on(hass) and not core.is_on(hass, TARGET_ID):'People home at 7AM, turning it on')
        core.turn_on(hass, TARGET_ID)

@track_state_change(light.ENTITY_ID_ALL_LIGHTS, STATE_ON, STATE_OFF)
def all_lights_off(hass, entity_id, old_state, new_state):
    """If all lights turn off, turn off."""
    if not TARGET_ID:

    if core.is_on(hass, TARGET_ID):'All lights have been turned off, turning it off')
        core.turn_off(hass, TARGET_ID)

def flash_service(hass, call):
    """Service that will toggle the target.

    Set the light to off for 10 seconds if on and vice versa.
    if not TARGET_ID:

    if core.is_on(hass, TARGET_ID):
        core.turn_off(hass, TARGET_ID)
        core.turn_on(hass, TARGET_ID)

        core.turn_on(hass, TARGET_ID)
        core.turn_off(hass, TARGET_ID)