MQTT TLS Support

[Vladimir RB]

In continue to https://devzone.nordicsemi.com/support/233777
We tested the demo for some days, it works. But last week it stoped on open socket with error -47.
At the same time the certificates and broker works good (we tested it from PC). We tested it with different mobile operator and got the same error.
What can leads to it?

[Didrik Rokhaug]

Hi.

Did the DNS lookup succeed?

If it was not successful, it should print a message on the form

"ai_addrlen = %u should be %u or %u\n"

Have you done any changes to the demo?

I also tested using the last code sent in the linked case, and it seemed to work on my end.

Best regards,

Didrik

[Vladimir RB]

Yes DNS works fine. We see the IP in log.
No we don't change anything after flashing the demo in the board. It's a pretty strange. The are the main question what was changed here? Because the broker developing team told that they don't change anything here and the certificates works from PC through MQTT.fx.

[Didrik Rokhaug]

Could you try to run the demo on another devkit?

Also, did you change the CONFIG_MQTT_PROVISION_CERTIFICATES to n after running the demo the first time?

[Vladimir RB]

We'll try to found another one evaluation board.

The demo works on your side?

[Didrik Rokhaug]

Yes, the demo works on my end.