Question Re: IoT services 4.0 HTTP code 200 but empty response in Technology Q&A

IoT services 4.0 HTTP code 200 but empty response

Former Member — Sun, 04 Feb 2024 01:45:57 GMT

Using the new SAP Internet of Things Services 4.0 I've been trying to push data to a device I created within the IoT Cockpit. For this I've followed this tutorial, and replaced the old API syntax with the newer one found in the IoT-starterkit . I've tried the POST method with curl and Postman and both give me an HTTP 200 OK response with an empty body. When I try the GET method to retrieve my measures on HOSTNAME/iot/core/api/v1/doc , this is what I get:

Has anyone had this issue with IoT services 4.0?

Re: IoT services 4.0 HTTP code 200 but empty response

anton_levin — Mon, 16 Oct 2017 16:12:19 GMT

Hello Samuel,

in order to understand and handle it better, some additional information is required, like your instance id, exact payload you are sending to the Gateway, data model structure, alternate IDs etc. It is recommended to provide such sensitive information in the customer ticket. Would it be possible for you to open one? We could then reply here shorty with a solution to close the current thread.

Thanks in advance,

Anton

Re: IoT services 4.0 HTTP code 200 but empty response

Former Member — Tue, 17 Oct 2017 09:11:08 GMT

Hello Anton, I opened an incident on the support launchpad.

Re: IoT services 4.0 HTTP code 200 but empty response

anton_levin — Wed, 18 Oct 2017 13:49:34 GMT

Just to close this thread, a short update. That particular IoT instance is configured to have Kafka processing service [1] only. SQL processing service is not enabled. That is why no measures are returned back when consuming them via the API or Cockpit. Incoming measures are only forwarded to Kafka for further processing.

[1] https://help.sap.com/viewer/8fa1879d878549cbad54b328d96dbdd3/Cloud/en-US/45687dfe3cda4c3686ce23d4262a6b55.html