[Backlogmanager] [FIWARE-JIRA] (HELP-19931) [fiware-stackoverflow] FIWARE: IotAgent-json over MQTT

[Fernando Lopez (JIRA)]

     [ https://jira.fiware.org/browse/HELP-19931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fernando Lopez reassigned HELP-19931:
-------------------------------------

    Assignee: Jason Fox

> [fiware-stackoverflow] FIWARE: IotAgent-json over MQTT
> ------------------------------------------------------
>
>                 Key: HELP-19931
>                 URL: https://jira.fiware.org/browse/HELP-19931
>             Project: Help-Desk
>          Issue Type: Monitor
>          Components: FIWARE-TECH-HELP
>            Reporter: Backlog Manager
>            Assignee: Jason Fox
>              Labels: fiware, fiware-orion, json, mqtt
>
> Created question in FIWARE Q/A platform on 10-08-2022 at 12:08
> {color: red}Please, ANSWER this question AT{color} https://stackoverflow.com/questions/73306361/fiware-iotagent-json-over-mqtt
> +Question:+
> FIWARE: IotAgent-json over MQTT
> +Description:+
> I'm working on connecting sensors to a FIWARE system.
> The sensor can report the monitoring data with MQTT in json payload.
> With a public mqtt broker(hivemq), I can get the monitoring data payload as below:
> {
> "src":"shellyplus1pm-7c87ce64d540",
> "dst":"shellyplus1pm-7c87ce64d540/events",
> "method":"NotifyStatus",
> "params":{
> "ts":1659606613.35,
> "switch:0":{
> "id":0,
> "apower":38.04
> }
> }
> }.
> my questions are:
> (1) the sensor can only publish data on topic DeviceId/events/rpc, but if I use FIWARE IotAgent-json, the IotAgent-json expects subscribing data on topic /json/{{api-key}}/{{device-id}}/attrs (according https://github.com/yanpengwuIoT/tutorials.IoT-over-MQTT), how can I let the IotAgent-json subscribe data on topic DeviceId/events/rpc, which is sensor firmware defined and can't be changed.
> (2) the sensor publishs monitoring payload as a nested multi-level json object as showed above, but the IotAgent-json can only support a single level json object (like '{"h": 70, "t": 15}' as described in https://github.com/telefonicaid/iotagent-json/blob/master/docs/usermanual.md), how can I parse the multi-level json object in IotAgent-json?
> Any comment, sample or documentation for this are very appreciated! Thank you very much.



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