Direction and Distance Finding Service (DDFS)

The Bluetooth® Low Energy GATT Direction and Distance Finding Service is a custom service that allows publication of distance, azimuth and elevation measurement data. It also allows adjusting the measurement configuration parameters.

Note

The current implementation is experimental.

Service UUID 

The 128-bit vendor-specific service UUID is 21490000-494a-4573-98af-f126af76f490.

Characteristic UUIDs
Characteristic	UUID
Distance Measurement	`21490001-494a-4573-98af-f126af76f490`
Azimuth Measurement	`21490002-494a-4573-98af-f126af76f490`
Elevation Measurement	`21490003-494a-4573-98af-f126af76f490`
DDF Feature	`21490004-494a-4573-98af-f126af76f490`
Control Point	`21490005-494a-4573-98af-f126af76f490`

Characteristics 

This service has the following characteristics.

Distance Measurement Characteristic 

Notify:: Enable notifications for the Distance Measurement Characteristic to receive measurements.

Azimuth Measurement Characteristic 

Notify:: Enable notifications for the Azimuth Measurement Characteristic to receive measurements.

Elevation Measurement Characteristic 

Notify:: Enable notifications for the Elevation Measurement Characteristic to receive measurements.

DDF Feature Characteristic 

Read:: Read the supported features.

Control Point Characteristic 

Write:: Write data to the Control Point Characteristic to change the configuration.

API documentation 

Header file: include/bluetooth/services/ddfs.h

Source file: subsys/bluetooth/services/ddfs.c

Direction and Distance Finding Service API