Add support for Ubiquiti mFi switchable devices

This adds support for mFi devices that are swichable,
such as the mFi Outlet device.

.coveragerc

@@ -138,6 +138,7 @@ omit =
     homeassistant/components/switch/arest.py
     homeassistant/components/switch/edimax.py
     homeassistant/components/switch/hikvisioncam.py
+    homeassistant/components/switch/mfi.py
     homeassistant/components/switch/mystrom.py
     homeassistant/components/switch/orvibo.py
     homeassistant/components/switch/rest.py

homeassistant/components/switch/mfi.py

@@ -0,0 +1,121 @@
+"""
+homeassistant.components.switch.mfi
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Support for Ubiquiti mFi Switches.
+
+Configuration:
+
+sensor:
+  platform: mfi
+  host: ADDRESS
+  port: PORT
+  username: USERNAME
+  password: PASSWORD
+
+Variable:
+
+host
+*Required
+ADDRESS is the IP or hostname of your mFi controller.
+
+port
+*Optional
+PORT is the port of your mFi controller (usually 6443)
+
+username
+*Required
+USERNAME is the mFi admin username
+
+password
+*Required
+PASSWORD is the mFi admin user's password
+"""
+
+import logging
+
+from homeassistant.components.switch import DOMAIN, SwitchDevice
+from homeassistant.const import CONF_USERNAME, CONF_PASSWORD
+from homeassistant.helpers import validate_config
+
+REQUIREMENTS = ['mficlient==0.2']
+
+_LOGGER = logging.getLogger(__name__)
+
+SWITCH_MODELS = [
+    'Outlet',
+]
+
+
+# pylint: disable=unused-variable
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """ Sets up mFi sensors. """
+
+    if not validate_config({DOMAIN: config},
+                           {DOMAIN: ['host',
+                                     CONF_USERNAME,
+                                     CONF_PASSWORD]},
+                           _LOGGER):
+        _LOGGER.error('A host, username, and password are required')
+        return False
+
+    host = config.get('host')
+    port = int(config.get('port', 6443))
+    username = config.get('username')
+    password = config.get('password')
+
+    from mficlient.client import MFiClient
+
+    try:
+        client = MFiClient(host, username, password, port=port)
+    except client.FailedToLogin as ex:
+        _LOGGER.error('Unable to connect to mFi: %s', str(ex))
+        return False
+
+    add_devices(MfiSwitch(port)
+                for device in client.get_devices()
+                for port in device.ports.values()
+                if port.model in SWITCH_MODELS)
+
+
+class MfiSwitch(SwitchDevice):
+    """ An mFi switch-able device. """
+    def __init__(self, port):
+        self._port = port
+
+    @property
+    def should_poll(self):
+        return True
+
+    @property
+    def unique_id(self):
+        return self._port.ident
+
+    @property
+    def name(self):
+        return self._port.label
+
+    @property
+    def is_on(self):
+        return self._port.output
+
+    def update(self):
+        self._port.refresh()
+
+    def turn_on(self):
+        self._port.control(True)
+        self._port.data['output'] = 1.0
+
+    def turn_off(self):
+        self._port.control(False)
+        self._port.data['output'] = 0.0
+
+    @property
+    def current_power_mwh(self):
+        return int(self._port.data.get('active_pwr', 0) * 1000)
+
+    @property
+    def state_attributes(self):
+        attr = super().state_attributes or {}
+        attr['volts'] = self._port.data.get('v_rms', 0)
+        attr['amps'] = self._port.data.get('i_rms', 0)
+        return attr

requirements_all.txt

@@ -106,6 +106,7 @@ liffylights==0.9.4
 limitlessled==1.0.0
 
 # homeassistant.components.sensor.mfi
+# homeassistant.components.switch.mfi
 mficlient==0.2
 
 # homeassistant.components.discovery