103 lines
2.8 KiB
Python
103 lines
2.8 KiB
Python
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"""Support for switch sensor using I2C PCAL9535A chip."""
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import logging
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import voluptuous as vol
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from pcal9535a import PCAL9535A
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from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchDevice
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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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_LOGGER = logging.getLogger(__name__)
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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_STRENGTH = "strength"
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STRENGTH_025 = "0.25"
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STRENGTH_050 = "0.5"
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STRENGTH_075 = "0.75"
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STRENGTH_100 = "1.0"
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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_STRENGTH = STRENGTH_100
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_SWITCHES_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): _SWITCHES_SCHEMA,
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vol.Optional(CONF_INVERT_LOGIC, default=DEFAULT_INVERT_LOGIC): cv.boolean,
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vol.Optional(CONF_STRENGTH, default=DEFAULT_STRENGTH): vol.In(
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[STRENGTH_025, STRENGTH_050, STRENGTH_075, STRENGTH_100]
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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 devices."""
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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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switches = []
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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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switches.append(PCAL9535ASwitch(pin_name, pin, invert_logic))
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add_entities(switches)
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class PCAL9535ASwitch(SwitchDevice):
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"""Representation of a PCAL9535A output pin."""
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def __init__(self, name, pin, invert_logic):
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"""Initialize the pin."""
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self._name = name or DEVICE_DEFAULT_NAME
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self._pin = pin
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self._pin.inverted = invert_logic
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self._pin.input = False
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self._state = self._pin.level
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@property
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def name(self):
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"""Return the name of the switch."""
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return self._name
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@property
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def should_poll(self):
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"""No polling needed."""
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return False
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@property
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def is_on(self):
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"""Return true if device is on."""
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return self._state
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@property
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def assumed_state(self):
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"""Return true if optimistic updates are used."""
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return True
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def turn_on(self, **kwargs):
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"""Turn the device on."""
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self._pin.level = True
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self._state = True
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self.schedule_update_ha_state()
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def turn_off(self, **kwargs):
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"""Turn the device off."""
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self._pin.level = False
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self._state = False
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self.schedule_update_ha_state()
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