90 lines
2.6 KiB
Python
90 lines
2.6 KiB
Python
"""Support for binary sensor using I2C PCAL9535A chip."""
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from pcal9535a import PCAL9535A
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import voluptuous as vol
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from homeassistant.components.binary_sensor import PLATFORM_SCHEMA, BinarySensorEntity
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from homeassistant.const import DEVICE_DEFAULT_NAME
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import homeassistant.helpers.config_validation as cv
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CONF_INVERT_LOGIC = "invert_logic"
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CONF_I2C_ADDRESS = "i2c_address"
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CONF_I2C_BUS = "i2c_bus"
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CONF_PINS = "pins"
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CONF_PULL_MODE = "pull_mode"
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MODE_UP = "UP"
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MODE_DOWN = "DOWN"
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MODE_DISABLED = "DISABLED"
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DEFAULT_INVERT_LOGIC = False
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DEFAULT_I2C_ADDRESS = 0x20
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DEFAULT_I2C_BUS = 1
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DEFAULT_PULL_MODE = MODE_DISABLED
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_SENSORS_SCHEMA = vol.Schema({cv.positive_int: cv.string})
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
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{
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vol.Required(CONF_PINS): _SENSORS_SCHEMA,
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vol.Optional(CONF_INVERT_LOGIC, default=DEFAULT_INVERT_LOGIC): cv.boolean,
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vol.Optional(CONF_PULL_MODE, default=DEFAULT_PULL_MODE): vol.All(
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vol.Upper, vol.In([MODE_UP, MODE_DOWN, MODE_DISABLED])
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),
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vol.Optional(CONF_I2C_ADDRESS, default=DEFAULT_I2C_ADDRESS): vol.Coerce(int),
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vol.Optional(CONF_I2C_BUS, default=DEFAULT_I2C_BUS): cv.positive_int,
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}
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)
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def setup_platform(hass, config, add_entities, discovery_info=None):
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"""Set up the PCAL9535A binary sensors."""
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pull_mode = config[CONF_PULL_MODE]
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invert_logic = config[CONF_INVERT_LOGIC]
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i2c_address = config[CONF_I2C_ADDRESS]
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bus = config[CONF_I2C_BUS]
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pcal = PCAL9535A(bus, i2c_address)
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binary_sensors = []
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pins = config[CONF_PINS]
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for pin_num, pin_name in pins.items():
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pin = pcal.get_pin(pin_num // 8, pin_num % 8)
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binary_sensors.append(
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PCAL9535ABinarySensor(pin_name, pin, pull_mode, invert_logic)
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)
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add_entities(binary_sensors, True)
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class PCAL9535ABinarySensor(BinarySensorEntity):
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"""Represent a binary sensor that uses PCAL9535A."""
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def __init__(self, name, pin, pull_mode, invert_logic):
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"""Initialize the PCAL9535A binary sensor."""
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self._name = name or DEVICE_DEFAULT_NAME
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self._pin = pin
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self._pin.input = True
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self._pin.inverted = invert_logic
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if pull_mode == "DISABLED":
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self._pin.pullup = 0
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elif pull_mode == "DOWN":
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self._pin.pullup = -1
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else:
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self._pin.pullup = 1
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self._state = None
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@property
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def name(self):
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"""Return the name of the sensor."""
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return self._name
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@property
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def is_on(self):
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"""Return the cached state of the entity."""
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return self._state
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def update(self):
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"""Update the GPIO state."""
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self._state = self._pin.level
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