93 lines
2.5 KiB
Python
93 lines
2.5 KiB
Python
"""Support for switch sensor using I2C MCP23017 chip."""
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import logging
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import voluptuous as vol
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from homeassistant.components.switch import PLATFORM_SCHEMA
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from homeassistant.const import DEVICE_DEFAULT_NAME
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from homeassistant.helpers.entity import ToggleEntity
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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_PINS = 'pins'
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CONF_PULL_MODE = 'pull_mode'
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DEFAULT_INVERT_LOGIC = False
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DEFAULT_I2C_ADDRESS = 0x20
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_SWITCHES_SCHEMA = vol.Schema({
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cv.positive_int: cv.string,
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})
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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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_I2C_ADDRESS, default=DEFAULT_I2C_ADDRESS):
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vol.Coerce(int),
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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 MCP23017 devices."""
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import board
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import busio
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import adafruit_mcp230xx
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invert_logic = config.get(CONF_INVERT_LOGIC)
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i2c_address = config.get(CONF_I2C_ADDRESS)
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i2c = busio.I2C(board.SCL, board.SDA)
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mcp = adafruit_mcp230xx.MCP23017(i2c, address=i2c_address)
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switches = []
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pins = config.get(CONF_PINS)
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for pin_num, pin_name in pins.items():
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pin = mcp.get_pin(pin_num)
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switches.append(MCP23017Switch(pin_name, pin, invert_logic))
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add_entities(switches)
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class MCP23017Switch(ToggleEntity):
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"""Representation of a MCP23017 output pin."""
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def __init__(self, name, pin, invert_logic):
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"""Initialize the pin."""
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import digitalio
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self._name = name or DEVICE_DEFAULT_NAME
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self._pin = pin
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self._invert_logic = invert_logic
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self._state = False
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self._pin.direction = digitalio.Direction.OUTPUT
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self._pin.value = self._invert_logic
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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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def turn_on(self, **kwargs):
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"""Turn the device on."""
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self._pin.value = not self._invert_logic
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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.value = self._invert_logic
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self._state = False
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self.schedule_update_ha_state()
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