MQTT between our custom nRD9160 device and our AWS VPC

RE: MQTT between our custom nRD9160 device and our AWS VPC

JackW — Sat, 08 Mar 2025 22:58:35 GMT

Thanks. We have discovered problem. The issue was that we didn't delete our old certifiactes before loading new certificates. Instead we thought we write over the old certificates. As a result our certificates weren't valid. Deleting the old certs and then loading new certs fixed the problem.

Thanks, and you can close the ticket now.

RE: MQTT between our custom nRD9160 device and our AWS VPC

Sigurd — Tue, 04 Mar 2025 09:45:55 GMT

Hi!

[quote user="JackW"]First of all, please note that we're not trying to connect to nRF Cloud. We're trying to connect to our own private AWS cloud site.[/quote]

In that case, I suggest having a look at the aws_iot sample, and see how that sample solve this:

https://github.com/nrfconnect/sdk-nrf/tree/main/samples/net/aws_iot

https://docs.nordicsemi.com/bundle/ncs-2.9.0/page/nrf/samples/net/aws_iot/README.html

These post might also be helpful: Connecting to AWS cloud services using the nRF9160

RE: MQTT between our custom nRD9160 device and our AWS VPC

JackW — Mon, 03 Mar 2025 17:59:33 GMT

Thnanks for your response, but unfortunately, this doesn't address my problem.

First of all, please note that we're not trying to connect to nRF Cloud. We're trying to connect to our own private AWS cloud site.

Next, we have certificates loaded, and we have an IoT Thing defined in our cloud, that corresponds to our custom nRF 9160 device. That's all working.

Our problem now is in trying to get MQTT messaging working. This is where the problem is, and this is where we need help.

According to this sequence of messages taken from the Serial Terminal, it appears that our device is attempting to communicate with the nRF Cloud, when we want it to communicate with our private AWS Cloud:

[00:33:39.554,626] <inf> app_event_manager: CLOUD_EVT_CONNECTION_TIMEOUT
[00:33:39.555,328] <inf> app_event_manager: CLOUD_EVT_CONNECTING
[00:33:46.414,825] <err> nrf_cloud_transport: MQTT input error: -128
[00:33:46.414,916] <err> nrf_cloud_transport: Error disconnecting from cloud: -128
[00:33:46.415,008] <inf> app_event_manager: CLOUD_EVT_DISCONNECTED

This defines the problem that we're trying to troubleshoot.

RE: MQTT between our custom nRD9160 device and our AWS VPC

Sigurd — Mon, 03 Mar 2025 12:56:57 GMT

Hi!

See these 2 posts here:

Difficulty Provisioning Thingy91 to AWS IoT Fleet Provisioning (Claim Method)

nRF Cloud Provisioning Service

and this doc page:

https://docs.nordicsemi.com/bundle/nrf-cloud/page/Devices/Security/Credentials.html#generating-credentials-using-at-commands