text: """Config flow for Raspberry Pi Power Supply Checker."""
  from typing import Any, Dict, Optional
  
  from rpi_bad_power import new_under_voltage
  
  from homeassistant import config_entries
  from homeassistant.core import HomeAssistant
  from homeassistant.helpers.config_entry_flow import DiscoveryFlowHandler
  
  from .const import DOMAIN
  
  
  async def _async_supported(hass: HomeAssistant) -> bool:
      """Return if the system supports under voltage detection."""
      under_voltage = await hass.async_add_executor_job(new_under_voltage)
      return under_voltage is not None
  
  
  class RPiPowerFlow(DiscoveryFlowHandler, domain=DOMAIN):
      """Discovery flow handler."""
  
      VERSION = 1
  
      def __init__(self) -> None:
          """Set up config flow."""
          super().__init__(
              DOMAIN,
              "Raspberry Pi Power Supply Checker",
              _async_supported,
              config_entries.CONN_CLASS_LOCAL_POLL,
          )
  
      async def async_step_onboarding(
          self, data: Optional[Dict[str, Any]] = None
      ) -> Dict[str, Any]:
          """Handle a flow initialized by onboarding."""
          has_devices = await self._discovery_function(self.hass)
  
          if not has_devices:
              return self.async_abort(reason="no_devices_found")
          return self.async_create_entry(title=self._title, data={})
  