MQTT connection refused ESP iot kit Sample Code

Pierre C 6

Hello,

I tried to use https://github.com/Azure-Samples/iot-middleware-freertos-samples/tree/main/demos/projects/ESPRESSIF/aziotkit to get my ESP connected to Azure Iot Hub. I am running it on a custom board but the structure is very close to what is on the AZIOTKIT.
I don't understand why the MQTT is unauthorized after the first successful step of the DPS. The ESP crashes on the assert after that.

You can find the log below:

00:30:48.328 -> [0;32mI (11509) sample_azureiotkit: Waiting for time synchronization with SNTP server [0m
00:30:52.973 -> W (16139) wifi:

risolis 8,701 Reputation points

2022-05-18T03:21:08.91+00:00

Hello @Pierre C

Thank you for your post.

I wonder if this is a similar behavior as the one below:

https://learn.microsoft.com/en-us/answers/questions/846251/not-receiving-acks-when-connection-to-iot-hub-thro.html

Looking forward to your feedback,

Best Regards,
Pierre C 6 Reputation points

2022-05-18T06:59:41.397+00:00

Hello @risolis ,

Sadly after changing the faulty function to
xResult = AzureIoTHubClient_Connect( &xAzureIoTHubClient,
true, &xSessionPresent,
sampleazureiotCONNACK_RECV_TIMEOUT_MS );

I still get the same unauthorized error.
I don't know how if my configuration of Azure Hub is correct to avoid a permission issue.

Thanks again for your answer and your time.
risolis 8,701 Reputation points

2022-05-19T03:24:07+00:00

Hi @Pierre C

Are you using credentials for the same or any digital certificate?

Regards,
Pierre C 6 Reputation points

2022-05-19T10:04:36.017+00:00

Hello @risolis ,

I am using the Symetric key as seen here: https://youtu.be/PNykfuJ3VDs?t=1567
I am not using a digital certificate.

I get this message in my log from Azure IOT
{"deviceId":"deviceIDfromDPS","moduleId":"mainmodule","sdkVersion":"c/1.1.0-beta.1(FreeRTOS)","protocol":"Mqtt","authType":null,"maskedIpAddress":"xx.xx.xxx.XXX","statusCode":"401","errorMessage":""}
I am simply using this code in my ESP32 and it fails at the line 418.

https://github.com/Azure-Samples/iot-middleware-freertos-samples/blob/main/demos/sample_azure_iot_pnp/sample_azure_iot_pnp.c

Thanks again for your help.
risolis 8,701 Reputation points

2022-05-20T04:41:00.89+00:00

Hi @Pierre C

Ok and now I understood.... So you are using a HMAC as key cause I though that you were using a SAS token for this.

Now I wonder if you have review Authorization/Date or x-ms-date on the header.

Sometimes a time mismatch occurs and then you get this error as well.

BR,

1 answer

Pierre C 6 Reputation points

2022-05-24T06:56:42.25+00:00

Thanks for everything @risolis ,
For anyone passing by, removing the module Id from the config file is the solution as the new device created by DPS has no module as a default.
P.
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1 person found this answer helpful.
risolis 8,701 Reputation points

2022-05-24T07:35:19.277+00:00

Your welcome and many thanks for your feedback!!

It was a pleasure to assist.

BR

afcec 21 Reputation points

2023-01-25T12:22:27.7733333+00:00

I am afraid I am experiencing exactly the same issue but I do not know what you mean with "removing the module Id from the config file". Could you elaborate a little more? Thanks!

afcec 21 Reputation points

2023-01-25T12:52:04.3033333+00:00

Ok, I got it. I removed these two lines before my call to AzureIoTHubClient_OptionsInit and it worked!

xTransport.xSend = TLS_Socket_Send; xTransport.xRecv = TLS_Socket_Recv;
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