Homematic ip tilt covers (#11650)

* add pyhomematic support for ip and tiltable covers

* use cached data in current_cover_tilt_position

* check for existance not for None

* reformatting

* check node for LEVEL_2

homeassistant/components/cover/homematic.py

@@ -5,9 +5,11 @@ For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/cover.homematic/
 """
 import logging
-from homeassistant.const import STATE_UNKNOWN
-from homeassistant.components.cover import CoverDevice, ATTR_POSITION
+
+from homeassistant.components.cover import CoverDevice, ATTR_POSITION,\
+    ATTR_TILT_POSITION
 from homeassistant.components.homematic import HMDevice, ATTR_DISCOVER_DEVICES
+from homeassistant.const import STATE_UNKNOWN
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -69,3 +71,40 @@ class HMCover(HMDevice, CoverDevice):
         """Generate a data dictoinary (self._data) from metadata."""
         self._state = "LEVEL"
         self._data.update({self._state: STATE_UNKNOWN})
+        if "LEVEL_2" in self._hmdevice.WRITENODE:
+            self._data.update(
+                {'LEVEL_2': STATE_UNKNOWN})
+
+    @property
+    def current_cover_tilt_position(self):
+        """Return current position of cover tilt.
+
+        None is unknown, 0 is closed, 100 is fully open.
+        """
+        if 'LEVEL_2' not in self._data:
+            return None
+
+        return int(self._data.get('LEVEL_2', 0) * 100)
+
+    def set_cover_tilt_position(self, **kwargs):
+        """Move the cover tilt to a specific position."""
+        if "LEVEL_2" in self._data and ATTR_TILT_POSITION in kwargs:
+            position = float(kwargs[ATTR_TILT_POSITION])
+            position = min(100, max(0, position))
+            level = position / 100.0
+            self._hmdevice.set_cover_tilt_position(level, self._channel)
+
+    def open_cover_tilt(self, **kwargs):
+        """Open the cover tilt."""
+        if "LEVEL_2" in self._data:
+            self._hmdevice.open_slats()
+
+    def close_cover_tilt(self, **kwargs):
+        """Close the cover tilt."""
+        if "LEVEL_2" in self._data:
+            self._hmdevice.close_slats()
+
+    def stop_cover_tilt(self, **kwargs):
+        """Stop cover tilt."""
+        if "LEVEL_2" in self._data:
+            self.stop_cover(**kwargs)