Bluetooth GATT Characteristic Reference

Boot Keyboard Output Report (0x2A32)

org.bluetooth.characteristic.boot_keyboard_output_report

The Boot Keyboard Output Report characteristic is used to transfer fixed format and length Output Report data between a HID Host operating in Boot Protocol Mode and a HID Service corresponding to a boot keyboard.

Quick Summary

Payload length is 1 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	Boot Keyboard Output Report
UUID	0x2A32
Type	org.bluetooth.characteristic.boot_keyboard_output_report
XML Root	Characteristic
Source File	org.bluetooth.characteristic.boot_keyboard_output_report.xml
Field Count	1

Field Specification

Parsed field definitions from the source XML value structure.

Field	Requirement	Format	Unit	Exponent	Notes
Boot Keyboard Output Report Value	Mandatory	uint8	-	-	-

Byte Layout and Decode

Payload length is 1 bytes.

function decodePayload(dataView, offset = 0) {
  const boot_keyboard_output_report_value = dataView.getUint8(offset + 0);
  return { boot_keyboard_output_report_value };
}

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 Boot Keyboard Output Report in Bluetooth GATT?

Boot Keyboard Output Report is defined as a Bluetooth GATT characteristic entry with type org.bluetooth.characteristic.boot_keyboard_output_report and UUID 0x2A32.

What UUID identifies Boot Keyboard Output Report?

The UUID for Boot Keyboard Output Report is 0x2A32.

How should I parse Boot Keyboard Output Report?