Specification
Definition
A SemBeacon is a Bluetooth Low Energy transmitter that advertises a namespace and instance identifier and a Uniform Resource Indicator (URI) linking to a RDF resource on the web describing the beacon's location and other information relevant to this location.
Bluetooth Specification
SemBeacon Flags
The specification provisions 1-byte for flags. These flags provide more context to the installation of the beacon so applications scanning for a beacon can decide whether or not they want to retrieve the semantic data for these beacons.
| Bit (MSB) | Description | Example |
|---|---|---|
| 0 | Indicates if the beacon has a position. | 0 = Unsure, 1 = Yes |
| 1 | Indicates if the beacon is private. | 0 = Public, 1 = Private |
| 2 | Indicates if the beacon is attached to a moving object. | 0 = No, 1 = Yes |
| 3 | Indicates if the beacon has a positioning system. | 0 = No, 1 = Yes |
| 4 | Indicates if the beacon has observable data. | 0 = No, 1 = Yes |
| 5 | Indicates if the beacon has actuators. | 0 = No, 1 = Yes |
| 6 - 7 | Reserved for future use. |
Resource URI
The resource URI should resolve to a semantic description of the beacon. Depending on the BLE version this resource URI needs to be shortened to fit in the advertisement data.
URI Shorteners
- tinyurl.com
- bitly.com
- s.sembeacon.org (only available in the SemBeacon app)
BLE 4.x Specification
BLE 5.x Specification
