Tweak iCloud device tracker

.coveragerc

@@ -41,6 +41,7 @@ omit =
     homeassistant/components/device_tracker/ddwrt.py
     homeassistant/components/device_tracker/fritz.py
     homeassistant/components/device_tracker/geofancy.py
+    homeassistant/components/device_tracker/icloud.py
     homeassistant/components/device_tracker/luci.py
     homeassistant/components/device_tracker/ubus.py
     homeassistant/components/device_tracker/netgear.py

homeassistant/components/device_tracker/icloud.py

@@ -20,14 +20,15 @@ import re
 from homeassistant.const import CONF_USERNAME, CONF_PASSWORD
 from homeassistant.helpers.event import track_utc_time_change
 
-SCAN_INTERVAL = 1800
-
 _LOGGER = logging.getLogger(__name__)
 
 REQUIREMENTS = ['https://github.com/picklepete/pyicloud/archive/'
                 '80f6cd6decc950514b8dc43b30c5bded81b34d5f.zip'
                 '#pyicloud==0.8.0']
 
+CONF_INTERVAL = 'interval'
+DEFAULT_INTERVAL = 8
+
 
 def setup_scanner(hass, config, see):
     """
@@ -38,8 +39,12 @@ def setup_scanner(hass, config, see):
     from pyicloud.exceptions import PyiCloudNoDevicesException
 
     # Get the username and password from the configuration
-    username = config[CONF_USERNAME]
-    password = config[CONF_PASSWORD]
+    username = config.get(CONF_USERNAME)
+    password = config.get(CONF_PASSWORD)
+
+    if username is None or password is None:
+        _LOGGER.error('Must specify a username and password')
+        return
 
     try:
         _LOGGER.info('Logging into iCloud Account')
@@ -48,11 +53,18 @@ def setup_scanner(hass, config, see):
                               password,
                               verify=True)
     except PyiCloudFailedLoginException as error:
-        _LOGGER.exception(
-            'Error logging into iCloud Service: %s' % error
-        )
+        _LOGGER.exception('Error logging into iCloud Service: %s', error)
         return
 
+    def keep_alive(now):
+        """
+        Keeps authenticating icloud connection
+        """
+        api.authenticate()
+        _LOGGER.info("Authenticate against iCloud.")
+
+    track_utc_time_change(hass, keep_alive, second=0)
+
     def update_icloud(now):
         """
         Authenticate against iCloud and scan for devices.
@@ -83,7 +95,7 @@ def setup_scanner(hass, config, see):
             _LOGGER.info('No iCloud Devices found!')
 
     track_utc_time_change(
-        hass,
-        update_icloud,
-        second=range(0, 60, SCAN_INTERVAL)
+        hass, update_icloud,
+        minute=range(0, 60, config.get(CONF_INTERVAL, DEFAULT_INTERVAL)),
+        second=0
     )

requirements_all.txt

@@ -9,6 +9,9 @@ jinja2>=2.8
 # homeassistant.components.arduino
 PyMata==2.07a
 
+# homeassistant.components.device_tracker.icloud
+https://github.com/picklepete/pyicloud/archive/80f6cd6decc950514b8dc43b30c5bded81b34d5f.zip#pyicloud==0.8.0
+
 # homeassistant.components.device_tracker.netgear
 pynetgear==0.3
 
@@ -177,6 +180,3 @@ https://github.com/persandstrom/python-verisure/archive/9873c4527f01b1ba1f72ae60
 
 # homeassistant.components.zwave
 pydispatcher==2.0.5
-
-# homeassistant.sensor.icloud
-https://github.com/picklepete/pyicloud/archive/80f6cd6decc950514b8dc43b30c5bded81b34d5f.zip#pyicloud==0.8.0