Beaglebone Black binary sensor (#5422)

* Configuration parameters defined

* Edge detection added

* Example configuration added and tipo corrected

* Comments updated, lint update

* Added check for input pull_mode

* Too long line

* trailing white space

* Configuration parameters defined

* Edge detection added

* Example configuration added and tipo corrected

* Comments updated, lint update

* Added check for input pull_mode

* Too long line

* trailing white space

* pylint disable import error

* read_input() changed to return boolean value, according changes in binary sensor

* example configuration in docstring changed to mention direct web link, pylint update

* read_input() updated according review

homeassistant/components/bbb_gpio.py

@@ -63,7 +63,7 @@ def read_input(pin):
     """Read a value from a GPIO."""
     # pylint: disable=import-error,undefined-variable
     import Adafruit_BBIO.GPIO as GPIO
-    return GPIO.input(pin)
+    return GPIO.input(pin) is GPIO.HIGH
 
 
 def edge_detect(pin, event_callback, bounce):

homeassistant/components/binary_sensor/bbb_gpio.py

@@ -0,0 +1,89 @@
+"""
+Support for binary sensor using Beaglebone Black GPIO.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/binary_sensor.bbb_gpio/
+"""
+import logging
+
+import voluptuous as vol
+
+import homeassistant.components.bbb_gpio as bbb_gpio
+from homeassistant.components.binary_sensor import (
+    BinarySensorDevice, PLATFORM_SCHEMA)
+from homeassistant.const import (DEVICE_DEFAULT_NAME, CONF_NAME)
+import homeassistant.helpers.config_validation as cv
+
+_LOGGER = logging.getLogger(__name__)
+
+DEPENDENCIES = ['bbb_gpio']
+
+CONF_PINS = 'pins'
+CONF_BOUNCETIME = 'bouncetime'
+CONF_INVERT_LOGIC = 'invert_logic'
+CONF_PULL_MODE = 'pull_mode'
+
+DEFAULT_BOUNCETIME = 50
+DEFAULT_INVERT_LOGIC = False
+DEFAULT_PULL_MODE = 'UP'
+
+PIN_SCHEMA = vol.Schema({
+    vol.Required(CONF_NAME): cv.string,
+    vol.Optional(CONF_BOUNCETIME, default=DEFAULT_BOUNCETIME): cv.positive_int,
+    vol.Optional(CONF_INVERT_LOGIC, default=DEFAULT_INVERT_LOGIC): cv.boolean,
+    vol.Optional(CONF_PULL_MODE, default=DEFAULT_PULL_MODE):
+        vol.In(['UP', 'DOWN'])
+})
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+    vol.Required(CONF_PINS, default={}):
+        vol.Schema({cv.string: PIN_SCHEMA}),
+})
+
+
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """Setup the Beaglebone Black GPIO devices."""
+    pins = config.get(CONF_PINS)
+
+    binary_sensors = []
+
+    for pin, params in pins.items():
+        binary_sensors.append(BBBGPIOBinarySensor(pin, params))
+    add_devices(binary_sensors)
+
+
+class BBBGPIOBinarySensor(BinarySensorDevice):
+    """Represent a binary sensor that uses Beaglebone Black GPIO."""
+
+    def __init__(self, pin, params):
+        """Initialize the Beaglebone Black binary sensor."""
+        self._pin = pin
+        self._name = params.get(CONF_NAME) or DEVICE_DEFAULT_NAME
+        self._bouncetime = params.get(CONF_BOUNCETIME)
+        self._pull_mode = params.get(CONF_PULL_MODE)
+        self._invert_logic = params.get(CONF_INVERT_LOGIC)
+
+        bbb_gpio.setup_input(self._pin, self._pull_mode)
+        self._state = bbb_gpio.read_input(self._pin)
+
+        def read_gpio(pin):
+            """Read state from GPIO."""
+            self._state = bbb_gpio.read_input(self._pin)
+            self.schedule_update_ha_state()
+
+        bbb_gpio.edge_detect(self._pin, read_gpio, self._bouncetime)
+
+    @property
+    def should_poll(self):
+        """No polling needed."""
+        return False
+
+    @property
+    def name(self):
+        """Return the name of the sensor."""
+        return self._name
+
+    @property
+    def is_on(self):
+        """Return the state of the entity."""
+        return self._state != self._invert_logic