Bluetooth GATT Characteristic Reference
Firmware Revision String (0x2A26)
The value of this characteristic is a UTF-8 string representing the firmware revision for the firmware within the device.
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 | Firmware Revision String |
| UUID | 0x2A26 |
| Type | org.bluetooth.characteristic.firmware_revision_string |
| XML Root | Characteristic |
| Source File | org.bluetooth.characteristic.firmware_revision_string.xml |
| Field Count | 1 |
Field Specification
Parsed field definitions from the source XML value structure.
| Field | Requirement | Format | Unit | Exponent | Notes |
|---|---|---|---|---|---|
| Firmware Revision | Mandatory | utf8s | - | - | - |
Byte Layout and Decode
Payload length is profile-defined or variable based on field formats.
function decodePayload(dataView, offset = 0) {
// Parse firmware_revision (utf8s) according to Bluetooth format rules.
return { firmware_revision };
}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 Firmware Revision String in Bluetooth GATT?
Firmware Revision String is defined as a Bluetooth GATT characteristic entry with type org.bluetooth.characteristic.firmware_revision_string and UUID 0x2A26.
What UUID identifies Firmware Revision String?
The UUID for Firmware Revision String is 0x2A26.
How should I parse Firmware Revision String?
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.