src.bluetooth_sig.gatt.characteristics.device_time_feature¶

Device Time Feature characteristic (0x2B8E).

Per DTS v1.0 Table 3.2, the characteristic contains:: E2E_CRC (uint16, conditional) + DT_Features (uint16, mandatory).

The DT_Features field is 2 octets (uint16). Bits 0-12 are defined in Table 3.3. Bits 13-15 are Reserved for Future Use.

References

Bluetooth SIG Device Time Service v1.0, Table 3.2, Table 3.3

Classes¶

Name	Description
`DeviceTimeFeatureCharacteristic`	Device Time Feature characteristic (0x2B8E).
`DeviceTimeFeatureFlags`	DT_Features bitfield — DTS v1.0 Table 3.3.

Module Contents¶

class src.bluetooth_sig.gatt.characteristics.device_time_feature.DeviceTimeFeatureCharacteristic(info: src.bluetooth_sig.types.CharacteristicInfo | None = None, validation: src.bluetooth_sig.gatt.characteristics.characteristic_meta.ValidationConfig | None = None)¶

Bases: src.bluetooth_sig.gatt.characteristics.base.BaseCharacteristic[DeviceTimeFeatureFlags]

Device Time Feature characteristic (0x2B8E).

org.bluetooth.characteristic.device_time_feature

Describes the features supported by the Device Time Service. The DT_Features field is 2 octets (uint16). When the E2E-CRC feature is not supported, the characteristic contains only DT_Features (2 octets).

expected_length: int = 2¶

class src.bluetooth_sig.gatt.characteristics.device_time_feature.DeviceTimeFeatureFlags¶

Bases: enum.IntFlag

DT_Features bitfield — DTS v1.0 Table 3.3.

Each bit indicates whether the corresponding service feature is supported. Bits 13-15 are Reserved for Future Use.

AUTHORIZATION_REQUIRED = 128¶

BASE_TIME_SECOND_FRACTIONS = 4¶

DISPLAYED_FORMATS = 16¶

DISPLAYED_FORMATS_CHANGEABLE = 32¶

E2E_CRC = 1¶

EPOCH_YEAR_1900 = 512¶

EPOCH_YEAR_2000 = 1024¶

PROPOSE_NON_LOGGED_TIME_ADJUSTMENT_LIMIT = 2048¶

RETRIEVE_ACTIVE_TIME_ADJUSTMENTS = 4096¶

RTC_DRIFT_TRACKING = 256¶

SEPARATE_USER_TIMELINE = 64¶

TIME_CHANGE_LOGGING = 2¶

TIME_OR_DATE_DISPLAYED_TO_USER = 8¶