old_contents: """
  A sensor platform which detects underruns and capped status from the official Raspberry Pi Kernel.
  
  Minimal Kernel needed is 4.14+
  """
  import logging
  
  from rpi_bad_power import UnderVoltage, new_under_voltage
  
  from homeassistant.components.binary_sensor import (
      BinarySensorDeviceClass,
      BinarySensorEntity,
  )
  from homeassistant.config_entries import ConfigEntry
  from homeassistant.core import HomeAssistant
  from homeassistant.helpers.entity_platform import AddEntitiesCallback
  
  _LOGGER = logging.getLogger(__name__)
  
  DESCRIPTION_NORMALIZED = "Voltage normalized. Everything is working as intended."
  DESCRIPTION_UNDER_VOLTAGE = "Under-voltage was detected. Consider getting a uninterruptible power supply for your Raspberry Pi."
  
  
  async def async_setup_entry(
      hass: HomeAssistant,
      config_entry: ConfigEntry,
      async_add_entities: AddEntitiesCallback,
  ) -> None:
      """Set up rpi_power binary sensor."""
      under_voltage = await hass.async_add_executor_job(new_under_voltage)
      async_add_entities([RaspberryChargerBinarySensor(under_voltage)], True)
  
  
  class RaspberryChargerBinarySensor(BinarySensorEntity):
      """Binary sensor representing the rpi power status."""
  
      _attr_device_class = BinarySensorDeviceClass.PROBLEM
      _attr_icon = "mdi:raspberry-pi"
      _attr_name = "RPi Power status"
      _attr_unique_id = "rpi_power"  # only one sensor possible
  
      def __init__(self, under_voltage: UnderVoltage) -> None:
          """Initialize the binary sensor."""
          self._under_voltage = under_voltage
  
      def update(self) -> None:
          """Update the state."""
          value = self._under_voltage.get()
          if self._attr_is_on != value:
              if value:
                  _LOGGER.warning(DESCRIPTION_UNDER_VOLTAGE)
              else:
                  _LOGGER.info(DESCRIPTION_NORMALIZED)
              self._attr_is_on = value
  
new_contents: """
  A sensor platform which detects underruns and capped status from the official Raspberry Pi Kernel.
  
  Minimal Kernel needed is 4.14+
  """
  import logging
  
  from rpi_bad_power import UnderVoltage, new_under_voltage
  
  from homeassistant.components.binary_sensor import (
      BinarySensorDeviceClass,
      BinarySensorEntity,
  )
  from homeassistant.config_entries import ConfigEntry
  from homeassistant.core import HomeAssistant
  from homeassistant.helpers.entity import EntityCategory
  from homeassistant.helpers.entity_platform import AddEntitiesCallback
  
  _LOGGER = logging.getLogger(__name__)
  
  DESCRIPTION_NORMALIZED = "Voltage normalized. Everything is working as intended."
  DESCRIPTION_UNDER_VOLTAGE = "Under-voltage was detected. Consider getting a uninterruptible power supply for your Raspberry Pi."
  
  
  async def async_setup_entry(
      hass: HomeAssistant,
      config_entry: ConfigEntry,
      async_add_entities: AddEntitiesCallback,
  ) -> None:
      """Set up rpi_power binary sensor."""
      under_voltage = await hass.async_add_executor_job(new_under_voltage)
      async_add_entities([RaspberryChargerBinarySensor(under_voltage)], True)
  
  
  class RaspberryChargerBinarySensor(BinarySensorEntity):
      """Binary sensor representing the rpi power status."""
  
      _attr_device_class = BinarySensorDeviceClass.PROBLEM
      _attr_entity_category = EntityCategory.DIAGNOSTIC
      _attr_icon = "mdi:raspberry-pi"
      _attr_name = "RPi Power status"
      _attr_unique_id = "rpi_power"  # only one sensor possible
  
      def __init__(self, under_voltage: UnderVoltage) -> None:
          """Initialize the binary sensor."""
          self._under_voltage = under_voltage
  
      def update(self) -> None:
          """Update the state."""
          value = self._under_voltage.get()
          if self._attr_is_on != value:
              if value:
                  _LOGGER.warning(DESCRIPTION_UNDER_VOLTAGE)
              else:
                  _LOGGER.info(DESCRIPTION_NORMALIZED)
              self._attr_is_on = value
  
subject: Mark RPI Power binary sensor as diagnostic (#76198)