rpi_gpi garage_door controller (#2369)

.coveragerc

@@ -114,6 +114,7 @@ omit =
     homeassistant/components/downloader.py
     homeassistant/components/feedreader.py
     homeassistant/components/garage_door/wink.py
+    homeassistant/components/garage_door/rpi_gpio.py
     homeassistant/components/ifttt.py
     homeassistant/components/keyboard.py
     homeassistant/components/light/blinksticklight.py

homeassistant/components/garage_door/rpi_gpio.py

@@ -0,0 +1,96 @@
+"""
+Support for building a Raspberry Pi garage controller in HA.
+
+Instructions for building the controller can be found here
+https://github.com/andrewshilliday/garage-door-controller
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/garage_door.rpi_gpio/
+"""
+
+import logging
+from time import sleep
+import voluptuous as vol
+from homeassistant.components.garage_door import GarageDoorDevice
+import homeassistant.components.rpi_gpio as rpi_gpio
+import homeassistant.helpers.config_validation as cv
+
+DEPENDENCIES = ['rpi_gpio']
+
+_LOGGER = logging.getLogger(__name__)
+
+_DOORS_SCHEMA = vol.All(
+    cv.ensure_list,
+    [
+        vol.Schema({
+            'name': str,
+            'relay_pin': int,
+            'state_pin': int,
+        })
+    ]
+)
+PLATFORM_SCHEMA = vol.Schema({
+    'platform': str,
+    vol.Required('doors'): _DOORS_SCHEMA,
+})
+
+
+# pylint: disable=unused-argument
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """Setup the garage door platform."""
+    doors = []
+    doors_conf = config.get('doors')
+
+    for door in doors_conf:
+        doors.append(RPiGPIOGarageDoor(door['name'], door['relay_pin'],
+                                       door['state_pin']))
+    add_devices(doors)
+
+
+class RPiGPIOGarageDoor(GarageDoorDevice):
+    """Representation of a Raspberry garage door."""
+
+    def __init__(self, name, relay_pin, state_pin):
+        """Initialize the garage door."""
+        self._name = name
+        self._state = False
+        self._relay_pin = relay_pin
+        self._state_pin = state_pin
+        rpi_gpio.setup_output(self._relay_pin)
+        rpi_gpio.setup_input(self._state_pin, 'DOWN')
+        rpi_gpio.write_output(self._relay_pin, True)
+
+    @property
+    def unique_id(self):
+        """Return the ID of this garage door."""
+        return "{}.{}".format(self.__class__, self._name)
+
+    @property
+    def name(self):
+        """Return the name of the garage door if any."""
+        return self._name
+
+    def update(self):
+        """Update the state of the garage door."""
+        self._state = rpi_gpio.read_input(self._state_pin) is True
+
+    @property
+    def is_closed(self):
+        """Return true if door is closed."""
+        return self._state
+
+    def _trigger(self):
+        """Trigger the door."""
+        rpi_gpio.write_output(self._relay_pin, False)
+        sleep(0.2)
+        rpi_gpio.write_output(self._relay_pin, True)
+
+    def close_door(self):
+        """Close the door."""
+        if not self.is_closed:
+            self._trigger()
+
+    def open_door(self):
+        """Open the door."""
+        if self.is_closed:
+            self._trigger()