90 lines
2.5 KiB
Python
90 lines
2.5 KiB
Python
"""Support for binary sensor using I2C MCP23017 chip."""
|
|
import logging
|
|
|
|
import voluptuous as vol
|
|
|
|
from homeassistant.components.binary_sensor import (
|
|
BinarySensorDevice, PLATFORM_SCHEMA)
|
|
from homeassistant.const import DEVICE_DEFAULT_NAME
|
|
import homeassistant.helpers.config_validation as cv
|
|
|
|
_LOGGER = logging.getLogger(__name__)
|
|
|
|
CONF_INVERT_LOGIC = 'invert_logic'
|
|
CONF_I2C_ADDRESS = 'i2c_address'
|
|
CONF_PINS = 'pins'
|
|
CONF_PULL_MODE = 'pull_mode'
|
|
|
|
MODE_UP = 'UP'
|
|
MODE_DOWN = 'DOWN'
|
|
|
|
DEFAULT_INVERT_LOGIC = False
|
|
DEFAULT_I2C_ADDRESS = 0x20
|
|
DEFAULT_PULL_MODE = MODE_UP
|
|
|
|
_SENSORS_SCHEMA = vol.Schema({
|
|
cv.positive_int: cv.string,
|
|
})
|
|
|
|
PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
|
|
vol.Required(CONF_PINS): _SENSORS_SCHEMA,
|
|
vol.Optional(CONF_INVERT_LOGIC, default=DEFAULT_INVERT_LOGIC): cv.boolean,
|
|
vol.Optional(CONF_PULL_MODE, default=DEFAULT_PULL_MODE):
|
|
vol.All(vol.Upper, vol.In([MODE_UP, MODE_DOWN])),
|
|
vol.Optional(CONF_I2C_ADDRESS, default=DEFAULT_I2C_ADDRESS):
|
|
vol.Coerce(int),
|
|
})
|
|
|
|
|
|
def setup_platform(hass, config, add_devices, discovery_info=None):
|
|
"""Set up the MCP23017 binary sensors."""
|
|
import board
|
|
import busio
|
|
import adafruit_mcp230xx
|
|
|
|
pull_mode = config[CONF_PULL_MODE]
|
|
invert_logic = config[CONF_INVERT_LOGIC]
|
|
i2c_address = config[CONF_I2C_ADDRESS]
|
|
|
|
i2c = busio.I2C(board.SCL, board.SDA)
|
|
mcp = adafruit_mcp230xx.MCP23017(i2c, address=i2c_address)
|
|
|
|
binary_sensors = []
|
|
pins = config[CONF_PINS]
|
|
|
|
for pin_num, pin_name in pins.items():
|
|
pin = mcp.get_pin(pin_num)
|
|
binary_sensors.append(MCP23017BinarySensor(
|
|
pin_name, pin, pull_mode, invert_logic))
|
|
|
|
add_devices(binary_sensors, True)
|
|
|
|
|
|
class MCP23017BinarySensor(BinarySensorDevice):
|
|
"""Represent a binary sensor that uses MCP23017."""
|
|
|
|
def __init__(self, name, pin, pull_mode, invert_logic):
|
|
"""Initialize the MCP23017 binary sensor."""
|
|
import digitalio
|
|
self._name = name or DEVICE_DEFAULT_NAME
|
|
self._pin = pin
|
|
self._pull_mode = pull_mode
|
|
self._invert_logic = invert_logic
|
|
self._state = None
|
|
self._pin.direction = digitalio.Direction.INPUT
|
|
self._pin.pull = digitalio.Pull.UP
|
|
|
|
@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
|
|
|
|
def update(self):
|
|
"""Update the GPIO state."""
|
|
self._state = self._pin.value
|