Bluetooth GATT Characteristic Reference
Day Date Time (0x2A0A)
Day Date Time is defined in the Bluetooth GATT XML specification with type org.bluetooth.characteristic.day_date_time and UUID 0x2A0A.
Quick Summary
Payload length is profile-defined or variable based on field formats. 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 | Day Date Time |
| UUID | 0x2A0A |
| Type | org.bluetooth.characteristic.day_date_time |
| XML Root | Characteristic |
| Source File | org.bluetooth.characteristic.day_date_time.xml |
| Field Count | 2 |
Field Specification
Parsed field definitions from the source XML value structure.
| Field | Requirement | Format | Unit | Exponent | Notes |
|---|---|---|---|---|---|
| Date Time | Mandatory | N/A | - | - | - |
| Day of Week | Mandatory | N/A | - | - | - |
Byte Layout and Decode
Payload length is profile-defined or variable based on field formats.
function decodePayload(dataView, offset = 0) {
// Parse date_time (N/A) according to Bluetooth format rules.
// Parse day_of_week (N/A) according to Bluetooth format rules.
return { date_time, day_of_week };
}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 Day Date Time in Bluetooth GATT?
Day Date Time is defined as a Bluetooth GATT characteristic entry with type org.bluetooth.characteristic.day_date_time and UUID 0x2A0A.
What UUID identifies Day Date Time?
The UUID for Day Date Time is 0x2A0A.
How should I parse Day Date Time?
Payload length is profile-defined or variable based on field formats.
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.