RE: CoAP - Callback function

Øyvind — Fri, 25 Apr 2025 13:42:12 GMT

Hey, that's excellent! Always good to solve the issue on your own. May I ask what the issue was?

Kind regards,
Øyvind

RE: CoAP - Callback function

Sage_Duggal — Fri, 25 Apr 2025 03:36:57 GMT

Hello there, thank you for your reply. I actually figured this one out on my own. The problem was related to my poor understanding of C, but we're getting better!

RE: CoAP - Callback function

Øyvind — Thu, 10 Apr 2025 13:47:56 GMT

Hello, I've been assigned your ticket and will look into this. Are you still using the slightly modified coap_client sample as in Errors when running coap_client sample from 2.9.0 SDK ?

Could you please elaborate what changes you have done and with what configuration?

Kind regards,
Øyvind

RE: CoAP - Callback function

Sage_Duggal — Thu, 10 Apr 2025 06:19:57 GMT

Lastly, in my coap_client_req() function call, I'm passing NULL for the coap_transmission_parameters which should resolve as the CoAP default values. Looking at the RFC 7252 spec, the default ACK_TIMEOUT is 2 seconds which seems sufficient.

RE: CoAP - Callback function

Sage_Duggal — Thu, 10 Apr 2025 06:16:55 GMT

Here is sample output from when I run the program after it's built using the debugging optimization. As you can see, the messages are sending, but only the first callback is received.

CoAP --> DEVICE ON.
[00:00:01.386,871] <inf> coap_client_sample: The CoAP client started.
[00:00:01.386,901] <inf> coap_client_sample: Bringing network interface up and connecting to the network
[00:00:02.720,336] <inf> coap_client_sample: Waiting for network connectivity
[00:00:05.857,421] <inf> coap_client_sample: Network connectivity established
[00:00:07.178,405] <inf> coap_client_sample: IPv4 Address found 10.60.10.132
[00:00:07.178,771] <inf> coap_client_sample: Socket created
[00:00:07.178,771] <inf> coap_client_sample: Initializing CoAP client
[00:00:07.180,786] <inf> coap_client_sample: CoAP POST request sent sent to coap.os.1nce.com
[00:00:07.180,816] <inf> coap_client_sample: Sent request, closing socket in 3 seconds
[00:00:07.484,283] <inf> coap_client_sample: CoAP response: code: 0x44, payload: 0 bytes
[00:00:10.181,182] <inf> coap_client_sample: periodic_coap_request_loop completed!
Exiting startup() in 2 seconds.

CoAP --> OK!
[00:00:33.185,394] <inf> coap_client_sample: The CoAP client started.
[00:00:33.185,424] <inf> coap_client_sample: Bringing network interface up and connecting to the network
[00:00:35.206,695] <inf> coap_client_sample: IPv4 Address found 10.60.10.132
[00:00:35.212,890] <inf> coap_client_sample: Socket created
[00:00:35.221,496] <inf> coap_client_sample: CoAP POST request sent sent to coap.os.1nce.com
[00:00:35.221,496] <inf> coap_client_sample: Sent request, closing socket in 3 seconds
[00:00:38.221,893] <inf> coap_client_sample: periodic_coap_request_loop completed!
Returning to the start of operate() in 3 seconds.

Entering operate()

CoAP --> OK!
[00:01:02.226,135] <inf> coap_client_sample: The CoAP client started.
[00:01:02.226,165] <inf> coap_client_sample: Bringing network interface up and connecting to the network
[00:01:04.238,739] <inf> coap_client_sample: IPv4 Address found 10.60.10.132
[00:01:04.244,934] <inf> coap_client_sample: Socket created
[00:01:04.253,540] <inf> coap_client_sample: CoAP POST request sent sent to coap.os.1nce.com
[00:01:04.253,540] <inf> coap_client_sample: Sent request, closing socket in 3 seconds
[00:01:07.253,936] <inf> coap_client_sample: periodic_coap_request_loop completed!
Returning to the start of operate() in 3 seconds.