CoAP Request Handler?

RE: CoAP Request Handler?

ced27 — Tue, 23 Nov 2021 14:25:02 GMT

The Server responds appropriately by every request. I know it because used trace collector to trace the transmission. Now what i want, is to be able to get a response from server without having to trace the transmission for me to know if the server responded appriopriately

RE: CoAP Request Handler?

JVKran — Tue, 23 Nov 2021 14:18:53 GMT

I'm sorry, yes, of course. Make sure the timeout is large enough for the server to respond. 1 second did it for me.

RE: CoAP Request Handler?

ced27 — Tue, 23 Nov 2021 14:17:24 GMT

Hi JVKran,

can you please tell me, how you manage to implement a coap request handler?

Best regards,

Cedric

RE: CoAP Request Handler?

JVKran — Wed, 27 Oct 2021 15:29:46 GMT

I'm happy to inform you that the problem has been resolved with the help of one of the sample programs. Both replies provided good pointers.

RE: CoAP Request Handler?

ludw — Mon, 25 Oct 2021 12:17:17 GMT

[quote userid="94539" url="~/f/nordic-q-a/80173/coap-request-handler"]This, however, crashes the nRF[/quote]

The problem could be, because in the SDK Version 1.7.0 and older, the client_handle_get_response needs a payload. If no payload is returned from the server, the example crashes with no error code.

RE: CoAP Request Handler?

Didrik Rokhaug — Fri, 01 Oct 2021 13:35:06 GMT

Hi,

Zephyr's CoAP library doesn't handle the socket, so it will never receive something by itself.

You could create a thread that poll()'s the socket, and calls a callback when there is some data on the socket.

poll() will make the thread sleep until something happened on the socket, or it times out.

If you don't want to write that code yourself, or need some inspiration, you can use our coap_utils library, which does just that.

[quote user=""]I'm using the nRF Connect SDK with Visual Studio Code extension and I'm absolutely loving it with my nRF9160 DK.[/quote]

That's great to hear. I'll make sure the developers know their work is apreciated.

Best regards,

Didrik