Bluetooth GATT Characteristic Reference
CSC Feature (0x2A5C)
The CSC (Cycling Speed and Cadence) Feature characteristic is used to describe the supported features of the Server.
Quick Summary
Payload length is 2 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 | CSC Feature |
| UUID | 0x2A5C |
| Type | org.bluetooth.characteristic.csc_feature |
| XML Root | Characteristic |
| Source File | org.bluetooth.characteristic.csc_feature.xml |
| Field Count | 1 |
Field Specification
Parsed field definitions from the source XML value structure.
| Field | Requirement | Format | Unit | Exponent | Notes |
|---|---|---|---|---|---|
| CSC Feature | Mandatory | 16bit | - | - | - |
Bit Map
Bit-level enumerations extracted from the XML BitField definition.
| Field | Bit | Size | Name | 0 Means | 1 Means |
|---|---|---|---|---|---|
| CSC Feature | 0 | 1 | Wheel Revolution Data Supported | False | True |
| CSC Feature | 1 | 1 | Crank Revolution Data Supported | False | True |
| CSC Feature | 2 | 1 | Multiple Sensor Locations Supported | False | True |
Byte Layout and Decode
Payload length is 2 bytes.
function decodePayload(dataView, offset = 0) {
// Parse csc_feature (16bit) according to Bluetooth format rules.
return { csc_feature };
}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 CSC Feature in Bluetooth GATT?
CSC Feature is defined as a Bluetooth GATT characteristic entry with type org.bluetooth.characteristic.csc_feature and UUID 0x2A5C.
What UUID identifies CSC Feature?
The UUID for CSC Feature is 0x2A5C.
How should I parse CSC Feature?
Payload length is 2 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.