mirror of
https://github.com/home-assistant/core
synced 2024-09-03 08:14:07 +02:00
81 lines
2.4 KiB
Python
81 lines
2.4 KiB
Python
"""Support for 1-Wire entities."""
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from __future__ import annotations
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from dataclasses import dataclass
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import logging
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from typing import Any
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from pyownet import protocol
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from homeassistant.helpers.entity import DeviceInfo, Entity, EntityDescription
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from homeassistant.helpers.typing import StateType
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from .const import READ_MODE_BOOL, READ_MODE_INT
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@dataclass
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class OneWireEntityDescription(EntityDescription):
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"""Class describing OneWire entities."""
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read_mode: str | None = None
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_LOGGER = logging.getLogger(__name__)
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class OneWireEntity(Entity):
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"""Implementation of a 1-Wire entity."""
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entity_description: OneWireEntityDescription
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def __init__(
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self,
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description: OneWireEntityDescription,
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device_id: str,
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device_info: DeviceInfo,
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device_file: str,
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name: str,
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owproxy: protocol._Proxy,
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) -> None:
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"""Initialize the entity."""
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self.entity_description = description
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self._attr_unique_id = f"/{device_id}/{description.key}"
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self._attr_device_info = device_info
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self._attr_name = name
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self._device_file = device_file
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self._state: StateType = None
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self._value_raw: float | None = None
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self._owproxy = owproxy
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@property
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def extra_state_attributes(self) -> dict[str, Any] | None:
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"""Return the state attributes of the entity."""
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return {
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"device_file": self._device_file,
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"raw_value": self._value_raw,
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}
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def _read_value(self) -> str:
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"""Read a value from the server."""
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read_bytes: bytes = self._owproxy.read(self._device_file)
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return read_bytes.decode().lstrip()
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def _write_value(self, value: bytes) -> None:
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"""Write a value to the server."""
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self._owproxy.write(self._device_file, value)
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def update(self) -> None:
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"""Get the latest data from the device."""
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try:
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self._value_raw = float(self._read_value())
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except protocol.Error as exc:
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_LOGGER.error("Failure to read server value, got: %s", exc)
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self._state = None
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else:
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if self.entity_description.read_mode == READ_MODE_INT:
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self._state = int(self._value_raw)
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elif self.entity_description.read_mode == READ_MODE_BOOL:
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self._state = int(self._value_raw) == 1
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else:
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self._state = round(self._value_raw, 1)
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