add arduino switch platform

homeassistant/components/switch/arduino.py

@@ -0,0 +1,93 @@
+"""
+homeassistant.components.switch.arduino
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Support for switching Arduino pins on and off. So fare only digital pins are
+supported.
+
+Configuration:
+
+switch:
+  platform: arduino
+  pins:
+    11:
+      name: Fan Office
+      type: digital
+    12:
+      name: Light Desk
+      type: digital
+
+Variables:
+
+pins
+*Required
+An array specifying the digital pins to use on the Arduino board.
+
+These are the variables for the pins array:
+
+name
+*Required
+The name for the pin that will be used in the frontend.
+
+type
+*Required
+The type of the pin: 'digital'.
+"""
+import logging
+
+import homeassistant.components.arduino as arduino
+from homeassistant.components.switch import SwitchDevice
+from homeassistant.const import DEVICE_DEFAULT_NAME
+
+DEPENDENCIES = ['arduino']
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """ Sets up the Arduino platform. """
+
+    # Verify that Arduino board is present
+    if arduino.BOARD is None:
+        _LOGGER.error('A connection has not been made to the Arduino board.')
+        return False
+
+    switches = []
+    pins = config.get('pins')
+    for pinnum, pin in pins.items():
+        if pin.get('name'):
+            switches.append(ArduinoSwitch(pin.get('name'),
+                                          pinnum,
+                                          pin.get('type')))
+    add_devices(switches)
+
+
+class ArduinoSwitch(SwitchDevice):
+    """ Represents an Arduino Switch. """
+    def __init__(self, name, pin, pin_type):
+        self._pin = pin
+        self._name = name or DEVICE_DEFAULT_NAME
+        self.pin_type = pin_type
+        self.direction = 'out'
+        self._state = False
+
+        arduino.BOARD.set_mode(self._pin, self.direction, self.pin_type)
+
+    @property
+    def name(self):
+        """ Get the name of the pin. """
+        return self._name
+
+    @property
+    def is_on(self):
+        """ Returns True if pin is high/on. """
+        return self._state
+
+    def turn_on(self):
+        """ Turns the pin to high/on. """
+        self._state = True
+        arduino.BOARD.set_digital_out_high(self._pin)
+
+    def turn_off(self):
+        """ Turns the pin to low/off. """
+        self._state = False
+        arduino.BOARD.set_digital_out_low(self._pin)