nRF9151 SLM app + socket (open/send/receive/close)

RE: nRF9151 SLM app + socket (open/send/receive/close)

Håkon Alseth — Thu, 31 Oct 2024 08:35:03 GMT

Glad to hear you got it working. Happy to help!

As mentioned, I reported this internally as a bug.

Kind regards,

Håkon

RE: nRF9151 SLM app + socket (open/send/receive/close)

bojan — Wed, 30 Oct 2024 15:31:01 GMT

It works after

AT#XPPP=0

command, Håkon Alseth . Thanks for the support!

RE: nRF9151 SLM app + socket (open/send/receive/close)

Håkon Alseth — Wed, 30 Oct 2024 14:53:51 GMT

Hi,

Thank you for sharing these details.

I see that you have PPP enabled, and I initially tested without. Sorry for this.

When adding PPP, I see the same problem. If you issue AT#XPPP=0, the socket connection will work. I will report this internally as a bug.

Kind regards,

Håkon

RE: nRF9151 SLM app + socket (open/send/receive/close)

bojan — Wed, 30 Oct 2024 11:00:07 GMT

Hello, Håkon Alseth

I forgot to add this socket opening step in my log, but it is not about it. Here is the log with the opening socket step included. Again, I'm unable to connect to HTTP server.

RE: nRF9151 SLM app + socket (open/send/receive/close)

Håkon Alseth — Wed, 30 Oct 2024 10:38:08 GMT

Hi,

You are getting an error as the socket does not exist. You should create the socket first, as shown in the documentation:

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/applications/serial_lte_modem/doc/slm_testing.html#tcp-ip-at-commands

If you are connecting to a website, it might be beneficial to use the http specific at commands:

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/applications/serial_lte_modem/doc/HTTPC_AT_commands.html

Kind regards,

Håkon

RE: nRF9151 SLM app + socket (open/send/receive/close)

bojan — Tue, 29 Oct 2024 17:02:35 GMT

What I meant by

[quote userid="2115" url="~/f/nordic-q-a/115925/nrf9151-slm-app-socket-open-send-receive-close/508407"]modem responds with ERROR after some time. [/quote]

is that I'm unable to establish a connection with the server. The connection is not broken due to the inactivity, it seems that the connection is not established at all. Here is the log:

RE: nRF9151 SLM app + socket (open/send/receive/close)

Håkon Alseth — Tue, 29 Oct 2024 15:42:36 GMT

Hi,

[quote user=""]modem responds with ERROR after some time. [/quote]

After a while (depending on the server you're connecting to), it is common that the peer disconnects due to a timeout if no communication is exchanged.

Is that what is happening here? Can you share a full log?

Kind regards,

Håkon