Update RPi.GPIO version and code refactoring

homeassistant/components/binary_sensor/rpi_gpio.py

@@ -0,0 +1,73 @@
+"""
+homeassistant.components.binary_sensor.rpi_gpio
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Allows to configure a binary_sensor state sensor using RPi GPIO.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/binary_sensor.rpi_gpio/
+"""
+
+import logging
+import homeassistant.components.rpi_gpio as rpi_gpio
+from homeassistant.helpers.entity import Entity
+from homeassistant.const import (STATE_ON, STATE_OFF, DEVICE_DEFAULT_NAME)
+
+DEFAULT_PULL_MODE = "UP"
+DEFAULT_BOUNCETIME = 50
+DEFAULT_INVERT_LOGIC = False
+
+DEPENDENCIES = ['rpi_gpio']
+_LOGGER = logging.getLogger(__name__)
+
+
+# pylint: disable=unused-argument
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """ Sets up the Raspberry PI GPIO ports. """
+
+    pull_mode = config.get('pull_mode', DEFAULT_PULL_MODE)
+    bouncetime = config.get('bouncetime', DEFAULT_BOUNCETIME)
+    invert_logic = config.get('invert_logic', DEFAULT_INVERT_LOGIC)
+
+    binary_sensors = []
+    ports = config.get('ports')
+    for port_num, port_name in ports.items():
+        binary_sensors.append(RPiGPIOBinarySensor(
+            port_name, port_num, pull_mode, bouncetime, invert_logic))
+    add_devices(binary_sensors)
+
+
+# pylint: disable=too-many-arguments, too-many-instance-attributes
+class RPiGPIOBinarySensor(Entity):
+    """ Sets up the Raspberry PI GPIO ports. """
+    def __init__(self, name, port, pull_mode, bouncetime, invert_logic):
+        # pylint: disable=no-member
+
+        self._name = name or DEVICE_DEFAULT_NAME
+        self._port = port
+        self._pull_mode = pull_mode
+        self._bouncetime = bouncetime
+        self._invert_logic = invert_logic
+
+        rpi_gpio.setup_input(self._port, self._pull_mode)
+        self._state = rpi_gpio.read_input(self._port)
+
+        def read_gpio(port):
+            """ Reads state from GPIO. """
+            self._state = rpi_gpio.read_input(self._port)
+            self.update_ha_state()
+        rpi_gpio.edge_detect(self._port, read_gpio, self._bouncetime)
+
+    @property
+    def should_poll(self):
+        """ No polling needed. """
+        return False
+
+    @property
+    def name(self):
+        """ The name of the sensor. """
+        return self._name
+
+    @property
+    def state(self):
+        """ Returns the state of the entity. """
+        return STATE_ON if self._state != self._invert_logic else STATE_OFF