dlinkw215.py

"""
Support for monitoring energy usage using the D-link W215 smart switch.

For more details about this platform, please refer to the documentation at
https://home-assistant.io/components/sensor.dlink/
"""
import logging

import voluptuous as vol

from homeassistant.helpers.entity import Entity
from homeassistant.components.sensor import PLATFORM_SCHEMA
import homeassistant.helpers.config_validation as cv
from homeassistant.const import (
    CONF_HOST, CONF_NAME, CONF_PASSWORD, CONF_USERNAME)

REQUIREMENTS = ['https://github.com/LinuxChristian/pyW215/archive/'
                'v0.1.1.zip#pyW215==0.1.1']

_LOGGER = logging.getLogger(__name__)

DEFAULT_NAME = 'D-link Smart Plug W215'
DEFAULT_PASSWORD = ''
DEFAULT_USERNAME = 'admin'

ICON = 'mdi:flash'

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
    vol.Required(CONF_HOST): cv.string,
    vol.Required(CONF_USERNAME, default=DEFAULT_USERNAME): cv.string,
    vol.Required(CONF_PASSWORD, default=DEFAULT_PASSWORD): cv.string,
    vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
})

# pylint: disable=unused-argument
def setup_platform(hass, config, add_devices, discovery_info=None):
    """Setup a D-Link Smart Plug."""
    from pyW215.pyW215 import SmartPlug

    host = config.get(CONF_HOST)
    username = config.get(CONF_USERNAME)
    password = config.get(CONF_PASSWORD)
    name = config.get(CONF_NAME)

    add_devices([SmartPlugSensor(SmartPlug(host, password, username), name)])


# pylint: disable=too-many-instance-attributes
class SmartPlugSensor(Entity):
    """Implementation of a DLink Smart Plug sensor."""

    def __init__(self, smartplug, name):
        """Initialize the sensor."""
        self._unit_of_measurement = "W"
        self._state = None
        self.smartplug = smartplug
        self._name = name

    @property
    def name(self):
        """Return the name of the sensor."""
        return self._name

    @property
    def state(self):
        """Return the state of the sensor."""
        return self._state

    @property
    def unit_of_measurement(self):
        """Return the unit of measurement of this entity, if any."""
        return self._unit_of_measurement

    @property
    def icon(self):
        """Icon to use in the frontend, if any."""
        return ICON

    def update(self):
        """Return the current power usage in Watt."""
        try:
            self._state = float(self.smartplug.current_consumption)
        except ValueError:
            return None

Excuse me, I'm a newbie.. I'm interested to install to my Home Assistant. The plug works fine as switch. How can implement also consumption in HA? I see this file but I don't know hot to do. Thank you