nRF Connect MQTT Sample Not Working as Expected

RE: nRF Connect MQTT Sample Not Working as Expected

Amanda Hsieh — Wed, 10 Jul 2024 19:55:56 GMT

Hi,

When building the unmodified MQTT sample with the command line, the following commands can be used for the nRF9161 DK:

west build -b nrf9161dk_nrf9161_ns -- -DOVERLAY_CONFIG=overlay-tls-nrf91.conf

Could you try the default setting?

-Amanda H.

RE: nRF Connect MQTT Sample Not Working as Expected

hahu — Wed, 10 Jul 2024 15:37:29 GMT

Update: I added some #warning preprocessor directives to the mqtt/src/modules/transport/credentials_provision/credentials_provision.c to check that the certificates & keys were being included only to find they weren't. I had assumed that mqtt/overlay-tls-nrf91.conf would automatically be used as I'm building for the nRF 9161 DK but it appears it wasn't. So, I added the contents of that file to prj.conf. Now I can find CONFIG_MQTT_HELPER_PORT and CONFIG_MQTT_LIB_TLS in build/zephyr/.config, but I'm now getting:

[00:02:42.741,546] <err> mqtt_helper: mqtt_connect, error: -111
[00:02:42.741,546] <err> transport: Failed connecting to MQTT, error code: -111

So, the sample has now been modified, I suppose (I've also update the port and the broker domain)

RE: nRF Connect MQTT Sample Not Working as Expected

hahu — Wed, 10 Jul 2024 08:51:43 GMT

Hi,

NCS version: v2.6.1
Building with the nRF Toolchain manager terminal (west build -p always -b nrf9161dk_nrf9161_ns nrf/samples/net/mqtt/)
The sample is unmodified
I can't find CONFIG_MQTT_HELPER_PORT or CONFIG_MQTT_LIB_TLS in build/zephyr/.config (or build/pm.config, in case that helps)

Hopefully that helps

RE: nRF Connect MQTT Sample Not Working as Expected

Amanda Hsieh — Tue, 09 Jul 2024 19:06:59 GMT

Hi,

Which NCS version and board are you using?

How do you build the sample?

Do you modify the sample? If so, what are the modifications?

Could you check the value of CONFIG_MQTT_HELPER_PORT=8884 and CONFIG_MQTT_LIB_TLS in the .config under build/zephyr?

Regards,
Amanda H.