45 lines
1.2 KiB
Python
45 lines
1.2 KiB
Python
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"""Helper to test significant sensor state changes."""
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from typing import Any, Optional
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from homeassistant.const import (
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ATTR_DEVICE_CLASS,
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ATTR_UNIT_OF_MEASUREMENT,
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TEMP_FAHRENHEIT,
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)
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from homeassistant.core import HomeAssistant
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from . import DEVICE_CLASS_BATTERY, DEVICE_CLASS_HUMIDITY, DEVICE_CLASS_TEMPERATURE
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async def async_check_significant_change(
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hass: HomeAssistant,
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old_state: str,
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old_attrs: dict,
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new_state: str,
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new_attrs: dict,
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**kwargs: Any,
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) -> Optional[bool]:
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"""Test if state significantly changed."""
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device_class = new_attrs.get(ATTR_DEVICE_CLASS)
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if device_class is None:
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return None
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if device_class == DEVICE_CLASS_TEMPERATURE:
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if new_attrs.get(ATTR_UNIT_OF_MEASUREMENT) == TEMP_FAHRENHEIT:
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change = 0.03
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else:
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change = 0.05
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old_value = float(old_state)
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new_value = float(new_state)
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return abs(1 - old_value / new_value) > change
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if device_class in (DEVICE_CLASS_BATTERY, DEVICE_CLASS_HUMIDITY):
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old_value = float(old_state)
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new_value = float(new_state)
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return abs(old_value - new_value) > 2
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return None
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