72 lines
2.0 KiB
Python
72 lines
2.0 KiB
Python
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"""
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Support for Modbus Coil sensors.
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For more details about this platform, please refer to the documentation at
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https://home-assistant.io/components/binary_sensor.modbus/
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"""
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import logging
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import voluptuous as vol
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from homeassistant.components import modbus
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from homeassistant.const import CONF_NAME, CONF_SLAVE
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from homeassistant.components.binary_sensor import BinarySensorDevice
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from homeassistant.helpers import config_validation as cv
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from homeassistant.components.sensor import PLATFORM_SCHEMA
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_LOGGER = logging.getLogger(__name__)
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DEPENDENCIES = ['modbus']
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CONF_COIL = 'coil'
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CONF_COILS = 'coils'
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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vol.Required(CONF_COILS): [{
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vol.Required(CONF_COIL): cv.positive_int,
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vol.Required(CONF_NAME): cv.string,
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vol.Optional(CONF_SLAVE): 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 Modbus binary sensors."""
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sensors = []
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for coil in config.get(CONF_COILS):
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sensors.append(ModbusCoilSensor(
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coil.get(CONF_NAME),
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coil.get(CONF_SLAVE),
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coil.get(CONF_COIL)))
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add_entities(sensors)
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class ModbusCoilSensor(BinarySensorDevice):
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"""Modbus coil sensor."""
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def __init__(self, name, slave, coil):
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"""Initialize the modbus coil sensor."""
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self._name = name
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self._slave = int(slave) if slave else None
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self._coil = int(coil)
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self._value = 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 state of the sensor."""
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return self._value
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def update(self):
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"""Update the state of the sensor."""
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result = modbus.HUB.read_coils(self._slave, self._coil, 1)
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try:
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self._value = result.bits[0]
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except AttributeError:
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_LOGGER.error(
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'No response from modbus slave %s coil %s',
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self._slave,
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self._coil)
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