If you want your application to be “smart”, you have to first make it “aware”. FIWARE provides you with means to produce, gather, publish and consume context information at large scale and exploit it to transform your application into a truly smart application.
Context information is represented through values assigned to attributes that characterize those entities relevant to your application. The Context Broker GE (open source reference implementation: Orion) is able to handle context information at large scale by implementing standard REST APIs.
- Already existing systems
- Users, through mobile apps
- Sensor networks
One of the most important features of the Context Broker GE is that it allows to model and gain access to context information in a way that is independent from the source of that information. As an example, your application may need to be aware about “Places” (identified by their specific geographical coordinates) and the “temperature” in them. The way in which the temperature of a given place is obtained may vary from place to place. Thus, the temperature of a given street may be measured through temperature sensors deployed in that street, while in another street it may be obtained through temperature sensors deployed on buses that circulate through the street and even in some other streets may be obtained through users who report the temperature using their smartphones. Using the RESTAPI exported by the Context Broker GE, the way in which your application will be able to query the temperature of places, or subscribe to changes on temperatures of places will be the same no matter which is the source of a temperature and it will not vary if the source of the temperature for a given place changes over time (e.g., the temperature of a given street turns to be measured through temperature sensors deployed on the streets rather than through buses equipped with sensors).
If you are interested in more details about how to make your application a context-aware application check out:
- Using NGSI v2:
On the other hand, you can browse the full API description here
There is an early FIWARE NGSI HTTP binding, named NGSI v1 but it has been largely overpassed by the current NGSIv2 version and it will be deprecated soon. Anyway you can check it here
If you want to start experimenting and doing hands-on work, have a look at: