RE: MQTT - issue with Connect ACK

Jose Forno — Tue, 16 Jun 2020 21:36:27 GMT

Hi Edvin,

Sorry for the long delay.

[quote userid="26071" url="~/f/nordic-q-a/61609/mqtt---issue-with-connect-ack/251665"]Are you following a guide or something? [/quote]

Yes, I followed the IoT guide found in the infocenter.

I put a break point inside the beginning of the mqtt_handle_packet() and also in MQTT_PKT_TYPE_CONNACK "switch/case". I also enabled the log in debug level in the mqtt library (in sdk_config.h).

I tested again:

- There's no event generated in the 90 seconds lapsus.

- Only after the 90 seconds both breakpoints happens.

- There's no output log.

With this test I can answer your questions:

[quote userid="26071" url="~/f/nordic-q-a/61609/mqtt---issue-with-connect-ack/251665"]evt.result = evt.param.connack.return_code if this handler is called?[/quote]

Yes. The handler is called but after the 90 seconds (as I told you before), i.e when the broker disconnect this client.

[quote userid="26071" url="~/f/nordic-q-a/61609/mqtt---issue-with-connect-ack/251665"]Do you get any other events in mqtt_handle_packet() at the time you would expect the MQTT_EVT_CONNACK event?[/quote]

No, no other events detected.

[quote userid="26071" url="~/f/nordic-q-a/61609/mqtt---issue-with-connect-ack/251665"]The addresses that you have sensored from the screenshot, are they all the same?[/quote]

Yes

[quote userid="26071" url="~/f/nordic-q-a/61609/mqtt---issue-with-connect-ack/251665"]Is the RPi using the correct address?[/quote]

Yes.

My question is , why the MQTT_EVT_CONNACK event is generated in the disconnection and not in the moment when the broker send it to the client?

Note: I also tested the mosquitto broker with tls-psk using "mosquitto_sub" and "mosquitto_pub" tools, and they worked ok with the given psk, the same that I used in the example.

Best Regards,

José Forno

RE: MQTT - issue with Connect ACK

Edvin — Tue, 26 May 2020 09:57:37 GMT

Are you following a guide or something?

[quote user=""]the broker send a "Connect Ack" but the publisher client example halts for some reason and it doesn't generate the MQTT_EVT_CONNACK event.[/quote]

Why does it do this? Can you debug and find out where the MQTT_EVT_CONNACK should be generated. Perhaps it will tell you why the MQTT_EVT_CONNACK isn't generated?

Please check the mqtt_handle_packet() in mqtt_rx.c.

What is

evt.result = evt.param.connack.return_code if this handler is called?

If this event is not generated, why is that?

Do you get any other events in mqtt_handle_packet() at the time you would expect the MQTT_EVT_CONNACK event?

The addresses that you have sensored from the screenshot, are they all the same? Is the RPi using the correct address?