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6 changes: 5 additions & 1 deletion homeassistant/components/nut/__init__.py
Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,8 @@
PYNUT_UNIQUE_ID,
)

NUT_FAKE_SERIAL = ["unknown", "blank"]

_LOGGER = logging.getLogger(__name__)


Expand Down Expand Up @@ -145,7 +147,9 @@ def _firmware_from_status(status):
def _serial_from_status(status):
"""Find the best serialvalue from the status."""
serial = status.get("device.serial") or status.get("ups.serial")
if serial and (serial.lower() == "unknown" or serial.count("0") == len(serial)):
if serial and (
serial.lower() in NUT_FAKE_SERIAL or serial.count("0") == len(serial)
):
return None
return serial

Expand Down