Add an OhmConnect sensor (#2758)

* Add an OhmConnect sensor

* use .get

.coveragerc

@@ -205,6 +205,7 @@ omit =
     homeassistant/components/sensor/loopenergy.py
     homeassistant/components/sensor/neurio_energy.py
     homeassistant/components/sensor/nzbget.py
+    homeassistant/components/sensor/ohmconnect.py
     homeassistant/components/sensor/onewire.py
     homeassistant/components/sensor/openweathermap.py
     homeassistant/components/sensor/openexchangerates.py

homeassistant/components/sensor/ohmconnect.py

@@ -0,0 +1,74 @@
+"""
+Support for OhmConnect.
+
+For more details about this platform, please refer to the documentation
+https://home-assistant.io/components/sensor.ohmconnect/
+"""
+import logging
+from datetime import timedelta
+import xml.etree.ElementTree as ET
+import requests
+
+from homeassistant.util import Throttle
+from homeassistant.helpers.entity import Entity
+
+_LOGGER = logging.getLogger(__name__)
+
+# Return cached results if last scan was less then this time ago.
+MIN_TIME_BETWEEN_UPDATES = timedelta(minutes=1)
+
+
+# pylint: disable=unused-argument
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """Setup the OhmConnect sensors."""
+    ohmid = config.get("id")
+    if ohmid is None:
+        _LOGGER.error("You must provide your OhmConnect ID!")
+        return False
+
+    add_devices([OhmconnectSensor(config.get("name", "OhmConnect Status"),
+                                  ohmid)])
+
+
+class OhmconnectSensor(Entity):
+    """Representation of a OhmConnect sensor."""
+
+    def __init__(self, name, ohmid):
+        """Initialize the sensor."""
+        self._name = name
+        self._ohmid = ohmid
+        self._data = {}
+        self.update()
+
+    @property
+    def name(self):
+        """The name of the sensor."""
+        return self._name
+
+    @property
+    def state(self):
+        """Return the state of the sensor."""
+        if self._data.get("active") == "True":
+            return "Active"
+        else:
+            return "Inactive"
+
+    @property
+    def device_state_attributes(self):
+        """Return the state attributes."""
+        return {"Address": self._data.get("address"), "ID": self._ohmid}
+
+    @Throttle(MIN_TIME_BETWEEN_UPDATES)
+    def update(self):
+        """Get the latest data from OhmConnect."""
+        try:
+            url = ("https://login.ohmconnect.com"
+                   "/verify-ohm-hour/{}").format(self._ohmid)
+            response = requests.get(url, timeout=10)
+            root = ET.fromstring(response.text)
+
+            for child in root:
+                self._data[child.tag] = child.text
+        except requests.exceptions.ConnectionError:
+            _LOGGER.error("No route to host/endpoint: %s", url)
+            self.data = {}