    def native_value(self):
        """
        Expose distance to given scanner.

        Don't break if that scanner's never heard of us!
        """
        devscanner = self._device.scanners.get(self._scanner.address, {})
        distance = getattr(devscanner, "rssi_distance", None)
        if distance is not None:
            return self._cached_ratelimit(round(distance, 3))
        return None
Expose distance to given scanner.

Don't break if that scanner's never heard of us!
custom_components/bermuda/sensor.py