Bluetooth GATT Characteristic Reference
Treadmill Data (0x2ACD)
The Treadmill Data characteristic is used to send training-related data to the Client from a treadmill (Server).
Quick Summary
Payload length is 34 bytes. This page is generated from official GATT XML and presented as implementation-ready guidance.
At a Glance
Key reference details for BLE implementation, interoperability testing, and AI-assisted troubleshooting.
| Property | Value |
|---|---|
| Name | Treadmill Data |
| UUID | 0x2ACD |
| Type | org.bluetooth.characteristic.treadmill_data |
| XML Root | Characteristic |
| Source File | org.bluetooth.characteristic.treadmill_data.xml |
| Field Count | 19 |
Field Specification
Parsed field definitions from the source XML value structure.
| Field | Requirement | Format | Unit | Exponent | Notes |
|---|---|---|---|---|---|
| Flags | Mandatory | 16bit | - | - | - |
| Instantaneous Speed | C1 | uint16 | org.bluetooth.unit.velocity.kilometre_per_hour | -2 | Kilometer per hour with a resolution of 0.01 |
| Average Speed | C2 | uint16 | org.bluetooth.unit.velocity.kilometre_per_hour | -2 | Kilometer per hour with a resolution of 0.01 |
| Total Distance | C3 | uint24 | org.bluetooth.unit.length.metre | - | Meters with a resolution of 1 |
| Inclination | C4 | sint16 | org.bluetooth.unit.percentage | -1 | Percent with a resolution of 0.1 |
| Ramp Angle Setting | C4 | sint16 | org.bluetooth.unit.plane_angle.degree | -1 | Degree with a resolution of 0.1 |
| Positive Elevation Gain | C5 | uint16 | org.bluetooth.unit.length.metre | -1 | Meters with a resolution of 0.1 |
| Negative Elevation Gain | C5 | uint16 | org.bluetooth.unit.length.metre | -1 | Meters with a resolution of 0.1 |
| Instantaneous Pace | C6 | uint8 | org.bluetooth.unit.velocity.kilometre_per_minute | -1 | Kilometer per minute with a resolution of 0.1 |
| Average Pace | C7 | uint8 | org.bluetooth.unit.velocity.kilometre_per_minute | -1 | Kilometer per minute with a resolution of 0.1 |
| Total Energy | C8 | uint16 | org.bluetooth.unit.energy.kilogram_calorie | - | Kilo Calorie with a resolution of 1 |
| Energy Per Hour | C8 | uint16 | org.bluetooth.unit.energy.kilogram_calorie | - | Kilo Calorie with a resolution of 1 |
| Energy Per Minute | C8 | uint8 | org.bluetooth.unit.energy.kilogram_calorie | - | Kilo Calorie with a resolution of 1 |
| Heart Rate | C9 | uint8 | org.bluetooth.unit.period.beats_per_minute | - | Beats per minute with a resolution of 1 |
| Metabolic Equivalent | C10 | uint8 | org.bluetooth.unit.metabolic_equivalent | - | Metabolic Equivalent with a resolution of 0.1 |
| Elapsed Time | C11 | uint16 | org.bluetooth.unit.time.second | - | Second with a resolution of 1 |
| Remaining Time | C12 | uint16 | org.bluetooth.unit.time.second | - | Second with a resolution of 1 |
| Force on Belt | C13 | sint16 | org.bluetooth.unit.force.newton | - | Newton with a resolution of 1 |
| Power Output | C13 | sint16 | org.bluetooth.unit.power.watt | - | Watts with a resolution of 1 |
Bit Map
Bit-level enumerations extracted from the XML BitField definition.
| Field | Bit | Size | Name | 0 Means | 1 Means |
|---|---|---|---|---|---|
| Flags | 0 | 1 | More Data | False | True |
| Flags | 1 | 1 | Average Speed present | False | True |
| Flags | 2 | 1 | Total Distance Present | False | True |
| Flags | 3 | 1 | Inclination and Ramp Angle Setting present | False | True |
| Flags | 4 | 1 | Elevation Gain present | False | True |
| Flags | 5 | 1 | Instantaneous Pace present | False | True |
| Flags | 6 | 1 | Average Pace present | False | True |
| Flags | 7 | 1 | Expended Energy present | False | True |
| Flags | 8 | 1 | Heart Rate present | False | True |
| Flags | 9 | 1 | Metabolic Equivalent present | False | True |
| Flags | 10 | 1 | Elapsed Time present | False | True |
| Flags | 11 | 1 | Remaining Time present | False | True |
| Flags | 12 | 1 | Force on Belt and Power Output present | False | True |
Byte Layout and Decode
Payload length is 34 bytes.
function decodePayload(dataView, offset = 0) {
// Parse flags (16bit) according to Bluetooth format rules.
const instantaneous_speed = dataView.getUint16(offset + 0, true);
const average_speed = dataView.getUint16(offset + 2, true);
// Parse total_distance (uint24) according to Bluetooth format rules.
const inclination = dataView.getInt16(offset + 4, true);
const ramp_angle_setting = dataView.getInt16(offset + 6, true);
const positive_elevation_gain = dataView.getUint16(offset + 8, true);
const negative_elevation_gain = dataView.getUint16(offset + 10, true);
const instantaneous_pace = dataView.getUint8(offset + 12);
const average_pace = dataView.getUint8(offset + 13);
return { flags, instantaneous_speed, average_speed, total_distance, inclination, ramp_angle_setting };
}Use Cases and Integration Notes
BLE Telemetry
Map characteristic values into dashboards and alerts for device observability.
Firmware Regression
Compare decoded fields across builds to detect protocol or scaling changes.
App Integration
Build stable parsing paths that convert raw payloads into typed app models.
Implementation Checklist
- Validate payload length and mandatory fields before decode.
- Decode with Bluetooth-specified signedness, unit, and exponent handling.
- Convert units at presentation boundaries to avoid drift in business logic.
- Persist raw packets and decoded values for reproducible troubleshooting.
FAQ
What is Treadmill Data in Bluetooth GATT?
Treadmill Data is defined as a Bluetooth GATT characteristic entry with type org.bluetooth.characteristic.treadmill_data and UUID 0x2ACD.
What UUID identifies Treadmill Data?
The UUID for Treadmill Data is 0x2ACD.
How should I parse Treadmill Data?
Payload length is 34 bytes.
Where does this definition come from?
This page is generated from the Bluetooth SIG mirror XML in the oesmith/gatt-xml repository.
How does this page support BLE implementation?
The page combines structured tables, practical Q&A, and JSON-LD metadata to help teams validate integrations and troubleshoot consistently.