Bluetooth GATT Service Reference
Immediate Alert (0x1802)
The Immediate Alert service is instantiated as a Primary Service. There is only one instance of the Immediate Alert service on a device. There is only one instance of the Alert Level characteristic in an Immediate Alert service. This alert continues until one of following conditions occurs: ? An implementation specific timeout ? User interaction on this device ? A new alert level is written ? The physical link is disconnected
Quick Summary
No fixed value payload is declared in this XML; this entry defines metadata and profile structure. 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 | Immediate Alert |
| UUID | 0x1802 |
| Type | org.bluetooth.service.immediate_alert |
| XML Root | Service |
| Source File | org.bluetooth.service.immediate_alert.xml |
| Field Count | 0 |
Characteristic List
Characteristics declared by this service profile entry.
| Characteristic | Type | Requirement | Properties |
|---|---|---|---|
| Alert Level | org.bluetooth.characteristic.alert_level | Mandatory | WriteWithoutResponse |
Use Cases and Integration Notes
Service Discovery
Use this definition to validate discovered services and expected characteristics during BLE onboarding.
Profile Compliance
Cross-check required characteristics and properties for conformance and QA automation.
App Capability Gating
Drive feature availability in apps based on whether service-level requirements are present.
Implementation Checklist
- Validate the service UUID during discovery before reading characteristic metadata.
- Ensure mandatory characteristics exist and expose expected properties.
- Map declaration data to app feature flags before attempting writes/subscriptions.
- Record mismatches between firmware tables and expected profile definitions in logs.
Dependencies
- This service has no dependencies on other GATT-based services
FAQ
What is Immediate Alert in Bluetooth GATT?
Immediate Alert is defined as a Bluetooth GATT service entry with type org.bluetooth.service.immediate_alert and UUID 0x1802.
What UUID identifies Immediate Alert?
The UUID for Immediate Alert is 0x1802.
How should I parse Immediate Alert?
Parse the structure and requirements from the XML definition, then enforce format/requirement rules in your BLE stack.
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.