IoTAgent 中的 FIWARE 元数据

Question

I try to set up a TTN based LoRaWAN Monitoring of my Gateways and devices inside a FIWARE-Environment. Therefore it would be essential to access data not in payload_field of the MQTT-Broker of TTN.

I wonder if it is possible to access field like counter, port, app_id and metadata.

I did not find a possibility yet. Does any of you face the same problem and got a solution to this challenge?

I use the following relevant FIWARE-components in a docker environment:

fiware/orion:2.2.0

fiware/iotagent-lorawan:1.2.3

mongo:3.6.8

Answer 1

If you need to receive metadata directly from LoRaWAN, you will have to customize the code within the LoRaWAN IoT Agent - this just passes measures by default, but the IoT Agent node lib interface is capable of receiving metadata as well.

Alternatively a recent PR Request for the IoT Agent node lib allows for additional static metadata to be added during the provisioning stage and sent as part of the requests to the context broker. You would need to use the latest development code base as the library hasn't been ported to the LoRaWAN IoT Agent yet - amend the iotagent-node-lib dependency in the package.json as shown:

"dependencies": {
... 
    "iotagent-node-lib": "git://github.com/telefonicaid/iotagent-node-lib.git#master",
...
  },
... etc

The documentation can be found here

Attributes with metadata are provisioned with an additional parameter as shown:

"attributes": [
        {"object_id": "s", "name": "state", "type":"Text"},
        {"object_id": "l", "name": "luminosity", "type":"Integer",
          "metadata":{
              "unitCode":{"type": "Text", "value" :"CAL"}
          }
        }