from Foundation import NSData
from CoreBluetooth import CBUUID
[docs]def cb_uuid_to_str(_uuid: CBUUID) -> str:
"""Converts a CoreBluetooth UUID to a Python string.
If ``_uuid`` is a 16-bit UUID, it is assumed to be a Bluetooth GATT UUID
(``0000xxxx-0000-1000-8000-00805f9b34fb``).
Args
_uuid: The UUID.
Returns:
The UUID as a lower case Python string (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx``)
"""
_uuid = _uuid.UUIDString()
if len(_uuid) == 4:
return "0000{0}-0000-1000-8000-00805f9b34fb".format(_uuid.lower())
# TODO: Evaluate if this is a necessary method...
# elif _is_uuid_16bit_compatible(_uuid):
# return _uuid[4:8].lower()
else:
return _uuid.lower()
def _is_uuid_16bit_compatible(_uuid: str) -> bool:
test_uuid = "0000ffff-0000-1000-8000-00805f9b34fb"
test_int = _convert_uuid_to_int(test_uuid)
uuid_int = _convert_uuid_to_int(_uuid)
result_int = uuid_int & test_int
return uuid_int == result_int
def _convert_uuid_to_int(_uuid: str) -> int:
UUID_cb = CBUUID.alloc().initWithString_(_uuid)
UUID_data = UUID_cb.data()
UUID_bytes = UUID_data.getBytes_length_(None, len(UUID_data))
UUID_int = int.from_bytes(UUID_bytes, byteorder="big")
return UUID_int
def _convert_int_to_uuid(i: int) -> str:
UUID_bytes = i.to_bytes(length=16, byteorder="big")
UUID_data = NSData.alloc().initWithBytes_length_(UUID_bytes, len(UUID_bytes))
UUID_cb = CBUUID.alloc().initWithData_(UUID_data)
return UUID_cb.UUIDString().lower()