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2026-03-15 17:13:35 +01:00

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Python

"""Support for TRMNL sensors."""
from __future__ import annotations
from collections.abc import Callable
from dataclasses import dataclass
from trmnl.models import Device
from homeassistant.components.sensor import (
SensorDeviceClass,
SensorEntity,
SensorEntityDescription,
SensorStateClass,
)
from homeassistant.const import (
PERCENTAGE,
SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
EntityCategory,
UnitOfElectricPotential,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
from . import TRMNLConfigEntry
from .coordinator import TRMNLCoordinator
from .entity import TRMNLEntity
PARALLEL_UPDATES = 0
@dataclass(frozen=True, kw_only=True)
class TRMNLSensorEntityDescription(SensorEntityDescription):
"""Describes a TRMNL sensor entity."""
value_fn: Callable[[Device], int | float | None]
SENSOR_DESCRIPTIONS: tuple[TRMNLSensorEntityDescription, ...] = (
TRMNLSensorEntityDescription(
key="battery",
device_class=SensorDeviceClass.BATTERY,
native_unit_of_measurement=PERCENTAGE,
state_class=SensorStateClass.MEASUREMENT,
entity_category=EntityCategory.DIAGNOSTIC,
value_fn=lambda device: device.percent_charged,
),
TRMNLSensorEntityDescription(
key="battery_voltage",
translation_key="battery_voltage",
device_class=SensorDeviceClass.VOLTAGE,
native_unit_of_measurement=UnitOfElectricPotential.VOLT,
state_class=SensorStateClass.MEASUREMENT,
entity_category=EntityCategory.DIAGNOSTIC,
entity_registry_enabled_default=False,
value_fn=lambda device: device.battery_voltage,
),
TRMNLSensorEntityDescription(
key="rssi",
device_class=SensorDeviceClass.SIGNAL_STRENGTH,
native_unit_of_measurement=SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
state_class=SensorStateClass.MEASUREMENT,
entity_category=EntityCategory.DIAGNOSTIC,
entity_registry_enabled_default=False,
value_fn=lambda device: device.rssi,
),
TRMNLSensorEntityDescription(
key="wifi_strength",
translation_key="wifi_strength",
native_unit_of_measurement=PERCENTAGE,
state_class=SensorStateClass.MEASUREMENT,
entity_category=EntityCategory.DIAGNOSTIC,
entity_registry_enabled_default=False,
value_fn=lambda device: device.wifi_strength,
),
)
async def async_setup_entry(
hass: HomeAssistant,
entry: TRMNLConfigEntry,
async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
"""Set up TRMNL sensor entities based on a config entry."""
coordinator = entry.runtime_data
known_device_ids: set[int] = set()
def _async_entity_listener() -> None:
new_ids = set(coordinator.data) - known_device_ids
if new_ids:
async_add_entities(
TRMNLSensor(coordinator, device_id, description)
for device_id in new_ids
for description in SENSOR_DESCRIPTIONS
)
known_device_ids.update(new_ids)
entry.async_on_unload(coordinator.async_add_listener(_async_entity_listener))
_async_entity_listener()
class TRMNLSensor(TRMNLEntity, SensorEntity):
"""Defines a TRMNL sensor."""
entity_description: TRMNLSensorEntityDescription
def __init__(
self,
coordinator: TRMNLCoordinator,
device_id: int,
description: TRMNLSensorEntityDescription,
) -> None:
"""Initialize TRMNL sensor."""
super().__init__(coordinator, device_id)
self.entity_description = description
self._attr_unique_id = f"{device_id}_{description.key}"
@property
def native_value(self) -> int | float | None:
"""Return the state of the sensor."""
return self.entity_description.value_fn(self._device)