58 lines
2.0 KiB
Python
58 lines
2.0 KiB
Python
"""Support for DSMR Reader through MQTT."""
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from __future__ import annotations
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from homeassistant.components import mqtt
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from homeassistant.components.sensor import SensorEntity
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from homeassistant.config_entries import ConfigEntry
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from homeassistant.core import HomeAssistant, callback
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from homeassistant.helpers.entity_platform import AddEntitiesCallback
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from homeassistant.util import slugify
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from .definitions import SENSORS, DSMRReaderSensorEntityDescription
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async def async_setup_entry(
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_: HomeAssistant,
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config_entry: ConfigEntry,
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async_add_entities: AddEntitiesCallback,
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) -> None:
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"""Set up DSMR Reader sensors from config entry."""
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async_add_entities(DSMRSensor(description, config_entry) for description in SENSORS)
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class DSMRSensor(SensorEntity):
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"""Representation of a DSMR sensor that is updated via MQTT."""
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_attr_has_entity_name = True
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entity_description: DSMRReaderSensorEntityDescription
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def __init__(
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self, description: DSMRReaderSensorEntityDescription, config_entry: ConfigEntry
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) -> None:
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"""Initialize the sensor."""
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self.entity_description = description
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slug = slugify(description.key.replace("/", "_"))
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self.entity_id = f"sensor.{slug}"
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self._attr_unique_id = f"{config_entry.entry_id}-{slug}"
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async def async_added_to_hass(self) -> None:
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"""Subscribe to MQTT events."""
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@callback
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def message_received(message):
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"""Handle new MQTT messages."""
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if message.payload == "":
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self._attr_native_value = None
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elif self.entity_description.state is not None:
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# Perform optional additional parsing
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self._attr_native_value = self.entity_description.state(message.payload)
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else:
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self._attr_native_value = message.payload
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self.async_write_ha_state()
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await mqtt.async_subscribe(
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self.hass, self.entity_description.key, message_received, 1
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)
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