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from __future__ import annotations
import struct
from aiohomekit.model import Characteristic, CharacteristicFormats
INT_TYPES = {
CharacteristicFormats.uint8,
CharacteristicFormats.uint16,
CharacteristicFormats.uint32,
CharacteristicFormats.uint64,
CharacteristicFormats.int,
}
def from_bytes(char: Characteristic, value: bytes) -> bool | str | float | int | bytes:
if char.format == CharacteristicFormats.bool:
return struct.unpack_from("?", value)[0]
elif char.format == CharacteristicFormats.uint8:
return struct.unpack_from("B", value)[0]
elif char.format == CharacteristicFormats.uint16:
return struct.unpack_from("H", value)[0]
elif char.format == CharacteristicFormats.uint32:
return struct.unpack_from("I", value)[0]
elif char.format == CharacteristicFormats.uint64:
return struct.unpack_from("Q", value)[0]
elif char.format == CharacteristicFormats.int:
return struct.unpack_from("i", value)[0]
elif char.format == CharacteristicFormats.float:
# FOR BLE float is 32 bit
return struct.unpack_from("f", value)[0]
elif char.format == CharacteristicFormats.string:
return value.decode("utf-8")
return value.hex()
def to_bytes(char: Characteristic, value: bool | str | float | int | bytes) -> bytes:
if char.format == CharacteristicFormats.bool:
value = struct.pack("?", value)
elif char.format == CharacteristicFormats.uint8:
value = struct.pack("B", value)
elif char.format == CharacteristicFormats.uint16:
value = struct.pack("H", value)
elif char.format == CharacteristicFormats.uint32:
value = struct.pack("I", value)
elif char.format == CharacteristicFormats.uint64:
value = struct.pack("Q", value)
elif char.format == CharacteristicFormats.int:
value = struct.pack("i", value)
elif char.format == CharacteristicFormats.float:
# FOR BLE float is 32 bit
value = struct.pack("f", value)
elif char.format == CharacteristicFormats.string:
value = value.encode("utf-8")
return bytes(value)
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