151 lines
5.3 KiB
Python
151 lines
5.3 KiB
Python
"""Support for 1-Wire environment sensors."""
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import os
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import time
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import logging
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from glob import glob
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import voluptuous as vol
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import homeassistant.helpers.config_validation as cv
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from homeassistant.helpers.entity import Entity
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from homeassistant.const import TEMP_CELSIUS
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from homeassistant.components.sensor import PLATFORM_SCHEMA
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_LOGGER = logging.getLogger(__name__)
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CONF_MOUNT_DIR = 'mount_dir'
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CONF_NAMES = 'names'
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DEFAULT_MOUNT_DIR = '/sys/bus/w1/devices/'
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DEVICE_SENSORS = {'10': {'temperature': 'temperature'},
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'12': {'temperature': 'TAI8570/temperature',
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'pressure': 'TAI8570/pressure'},
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'22': {'temperature': 'temperature'},
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'26': {'temperature': 'temperature',
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'humidity': 'humidity',
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'pressure': 'B1-R1-A/pressure',
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'illuminance': 'S3-R1-A/illuminance'},
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'28': {'temperature': 'temperature'},
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'3B': {'temperature': 'temperature'},
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'42': {'temperature': 'temperature'}}
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SENSOR_TYPES = {
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'temperature': ['temperature', TEMP_CELSIUS],
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'humidity': ['humidity', '%'],
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'pressure': ['pressure', 'mb'],
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'illuminance': ['illuminance', 'lux'],
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}
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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vol.Optional(CONF_NAMES): {cv.string: cv.string},
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vol.Optional(CONF_MOUNT_DIR, default=DEFAULT_MOUNT_DIR): cv.string,
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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 one wire Sensors."""
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base_dir = config.get(CONF_MOUNT_DIR)
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devs = []
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device_names = {}
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if 'names' in config:
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if isinstance(config['names'], dict):
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device_names = config['names']
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if base_dir == DEFAULT_MOUNT_DIR:
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for device_family in DEVICE_SENSORS:
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for device_folder in glob(os.path.join(base_dir, device_family +
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'[.-]*')):
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sensor_id = os.path.split(device_folder)[1]
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device_file = os.path.join(device_folder, 'w1_slave')
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devs.append(OneWireDirect(device_names.get(sensor_id,
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sensor_id),
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device_file, 'temperature'))
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else:
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for family_file_path in glob(os.path.join(base_dir, '*', 'family')):
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with open(family_file_path, "r") as family_file:
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family = family_file.read()
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if family in DEVICE_SENSORS:
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for sensor_key, sensor_value in DEVICE_SENSORS[family].items():
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sensor_id = os.path.split(
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os.path.split(family_file_path)[0])[1]
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device_file = os.path.join(
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os.path.split(family_file_path)[0], sensor_value)
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devs.append(OneWireOWFS(device_names.get(sensor_id,
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sensor_id),
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device_file, sensor_key))
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if devs == []:
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_LOGGER.error("No onewire sensor found. Check if dtoverlay=w1-gpio "
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"is in your /boot/config.txt. "
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"Check the mount_dir parameter if it's defined")
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return
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add_entities(devs, True)
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class OneWire(Entity):
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"""Implementation of an One wire Sensor."""
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def __init__(self, name, device_file, sensor_type):
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"""Initialize the sensor."""
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self._name = name+' '+sensor_type.capitalize()
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self._device_file = device_file
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self._unit_of_measurement = SENSOR_TYPES[sensor_type][1]
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self._state = None
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def _read_value_raw(self):
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"""Read the value as it is returned by the sensor."""
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with open(self._device_file, 'r') as ds_device_file:
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lines = ds_device_file.readlines()
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return lines
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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 state(self):
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"""Return the state of the sensor."""
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return self._state
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@property
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def unit_of_measurement(self):
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"""Return the unit the value is expressed in."""
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return self._unit_of_measurement
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class OneWireDirect(OneWire):
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"""Implementation of an One wire Sensor directly connected to RPI GPIO."""
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def update(self):
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"""Get the latest data from the device."""
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value = None
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lines = self._read_value_raw()
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while lines[0].strip()[-3:] != 'YES':
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time.sleep(0.2)
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lines = self._read_value_raw()
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equals_pos = lines[1].find('t=')
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if equals_pos != -1:
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value_string = lines[1][equals_pos + 2:]
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value = round(float(value_string) / 1000.0, 1)
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self._state = value
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class OneWireOWFS(OneWire):
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"""Implementation of an One wire Sensor through owfs."""
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def update(self):
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"""Get the latest data from the device."""
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value = None
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try:
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value_read = self._read_value_raw()
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if len(value_read) == 1:
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value = round(float(value_read[0]), 1)
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except ValueError:
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_LOGGER.warning("Invalid value read from %s", self._device_file)
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except FileNotFoundError:
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_LOGGER.warning("Cannot read from sensor: %s", self._device_file)
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self._state = value
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