src.bluetooth_sig.gatt.characteristics.treadmill_data¶

Treadmill Data characteristic implementation.

Implements the Treadmill Data characteristic (0x2ACD) from the Fitness Machine Service. A 16-bit flags field controls the presence of optional data fields.

Bit 0 (“More Data”) uses inverted logic: when bit 0 is 0 the Instantaneous Speed field IS present; when bit 0 is 1 it is absent. All other bits use normal logic (1 = present).

References

Bluetooth SIG Fitness Machine Service 1.0 org.bluetooth.characteristic.treadmill_data (GSS YAML)

Classes¶

Name	Description
`TreadmillData`	Parsed data from Treadmill Data characteristic.
`TreadmillDataCharacteristic`	Treadmill Data characteristic (0x2ACD).
`TreadmillDataFlags`	Treadmill Data flags as per Bluetooth SIG specification.

Module Contents¶

class src.bluetooth_sig.gatt.characteristics.treadmill_data.TreadmillData¶

Bases: msgspec.Struct

Parsed data from Treadmill Data characteristic.

flags¶: Raw 16-bit flags field.

instantaneous_speed¶: Instantaneous belt speed in km/h (0.01 resolution).

average_speed¶: Average speed in km/h (0.01 resolution).

total_distance¶: Total distance in metres (uint24).

inclination¶: Current inclination in % (0.1 resolution, signed).

ramp_angle_setting¶: Current ramp angle in degrees (0.1 resolution, signed).

positive_elevation_gain¶: Positive elevation gain in metres (0.1 resolution).

negative_elevation_gain¶: Negative elevation gain in metres (0.1 resolution).

instantaneous_pace¶: Instantaneous pace in seconds per 500 m.

average_pace¶: Average pace in seconds per 500 m.

total_energy¶: Total expended energy in kcal.

energy_per_hour¶: Expended energy per hour in kcal.

energy_per_minute¶: Expended energy per minute in kcal.

heart_rate¶: Heart rate in bpm.

metabolic_equivalent¶: MET value (0.1 resolution).

elapsed_time¶: Elapsed time in seconds.

remaining_time¶: Remaining time in seconds.

force_on_belt¶: Force on belt in newtons (signed).

power_output¶: Power output in watts (signed).

average_pace: int | None = None¶

average_speed: float | None = None¶

elapsed_time: int | None = None¶

energy_per_hour: int | None = None¶

energy_per_minute: int | None = None¶

flags: TreadmillDataFlags¶

force_on_belt: int | None = None¶

heart_rate: int | None = None¶

inclination: float | None = None¶

instantaneous_pace: int | None = None¶

instantaneous_speed: float | None = None¶

metabolic_equivalent: float | None = None¶

negative_elevation_gain: float | None = None¶

positive_elevation_gain: float | None = None¶

power_output: int | None = None¶

ramp_angle_setting: float | None = None¶

remaining_time: int | None = None¶

total_distance: int | None = None¶

total_energy: int | None = None¶

class src.bluetooth_sig.gatt.characteristics.treadmill_data.TreadmillDataCharacteristic(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[TreadmillData]

Treadmill Data characteristic (0x2ACD).

Used in the Fitness Machine Service to transmit treadmill workout data. A 16-bit flags field controls which optional fields are present.

Flag-bit assignments (from GSS YAML):: Bit 0: More Data – inverted: 0 -> Inst. Speed present, 1 -> absent Bit 1: Average Speed present Bit 2: Total Distance present Bit 3: Inclination and Ramp Angle Setting present (gates 2 fields) Bit 4: Elevation Gain present (gates 2 fields: pos + neg) Bit 5: Instantaneous Pace present Bit 6: Average Pace present Bit 7: Expended Energy present (gates triplet: total + /hr + /min) Bit 8: Heart Rate present Bit 9: Metabolic Equivalent present Bit 10: Elapsed Time present Bit 11: Remaining Time present Bit 12: Force On Belt and Power Output present (gates 2 fields) Bits 13-15: Reserved for Future Use

allow_variable_length: bool = True¶

expected_type¶

min_length: int = 2¶

class src.bluetooth_sig.gatt.characteristics.treadmill_data.TreadmillDataFlags¶

Bases: enum.IntFlag

Treadmill Data flags as per Bluetooth SIG specification.

Bit 0 uses inverted logic: 0 = Instantaneous Speed present, 1 = absent.

AVERAGE_PACE_PRESENT = 64¶

AVERAGE_SPEED_PRESENT = 2¶

ELAPSED_TIME_PRESENT = 1024¶

ELEVATION_GAIN_PRESENT = 16¶

EXPENDED_ENERGY_PRESENT = 128¶

FORCE_AND_POWER_PRESENT = 4096¶

HEART_RATE_PRESENT = 256¶

INCLINATION_AND_RAMP_PRESENT = 8¶

INSTANTANEOUS_PACE_PRESENT = 32¶

METABOLIC_EQUIVALENT_PRESENT = 512¶

MORE_DATA = 1¶

REMAINING_TIME_PRESENT = 2048¶

TOTAL_DISTANCE_PRESENT = 4¶