MSP432E401Y: AWS IoT Certificates

Hi Adam,

Let me see if I can find help from an expert on this topic.

Hi,

I am investigating your issue, and will need an additional day before I can give you a substantial response. I appreciate your patience.

Regards,

Michael

Thanks, I look forward to your response. 

Hi,

I don't think your cert formatting is correct. You might be missing endline characters that you will need to add to your array. Please see this example for how the Starfield Class 2 Certification Authority root ca cert would be formatted:

unsigned char root_ca_pem[] =
"-----BEGIN CERTIFICATE-----\r\n"
"MIIEDzCCAvegAwIBAgIBADANBgkqhkiG9w0BAQUFADBoMQswCQYDVQQGEwJVUzEl\r\n"
"MCMGA1UEChMcU3RhcmZpZWxkIFRlY2hub2xvZ2llcywgSW5jLjEyMDAGA1UECxMp\r\n"
"U3RhcmZpZWxkIENsYXNzIDIgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMDQw\r\n"
"NjI5MTczOTE2WhcNMzQwNjI5MTczOTE2WjBoMQswCQYDVQQGEwJVUzElMCMGA1UE\r\n"
"ChMcU3RhcmZpZWxkIFRlY2hub2xvZ2llcywgSW5jLjEyMDAGA1UECxMpU3RhcmZp\r\n"
"ZWxkIENsYXNzIDIgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwggEgMA0GCSqGSIb3\r\n"
"DQEBAQUAA4IBDQAwggEIAoIBAQC3Msj+6XGmBIWtDBFk385N78gDGIc/oav7PKaf\r\n"
"8MOh2tTYbitTkPskpD6E8J7oX+zlJ0T1KKY/e97gKvDIr1MvnsoFAZMej2YcOadN\r\n"
"+lq2cwQlZut3f+dZxkqZJRRU6ybH838Z1TBwj6+wRir/resp7defqgSHo9T5iaU0\r\n"
"X9tDkYI22WY8sbi5gv2cOj4QyDvvBmVmepsZGD3/cVE8MC5fvj13c7JdBmzDI1aa\r\n"
"K4UmkhynArPkPw2vCHmCuDY96pzTNbO8acr1zJ3o/WSNF4Azbl5KXZnJHoe0nRrA\r\n"
"1W4TNSNe35tfPe/W93bC6j67eA0cQmdrBNj41tpvi/JEoAGrAgEDo4HFMIHCMB0G\r\n"
"A1UdDgQWBBS/X7fRzt0fhvRbVazc1xDCDqmI5zCBkgYDVR0jBIGKMIGHgBS/X7fR\r\n"
"zt0fhvRbVazc1xDCDqmI56FspGowaDELMAkGA1UEBhMCVVMxJTAjBgNVBAoTHFN0\r\n"
"YXJmaWVsZCBUZWNobm9sb2dpZXMsIEluYy4xMjAwBgNVBAsTKVN0YXJmaWVsZCBD\r\n"
"bGFzcyAyIENlcnRpZmljYXRpb24gQXV0aG9yaXR5ggEAMAwGA1UdEwQFMAMBAf8w\r\n"
"DQYJKoZIhvcNAQEFBQADggEBAAWdP4id0ckaVaGsafPzWdqbAYcaT1epoXkJKtv3\r\n"
"L7IezMdeatiDh6GX70k1PncGQVhiv45YuApnP+yz3SFmH8lU+nLMPUxA2IGvd56D\r\n"
"eruix/U0F47ZEUD0/CwqTRV/p2JdLiXTAAsgGh1o+Re49L2L7ShZ3U0WixeDyLJl\r\n"
"xy16paq8U4Zt3VekyvggQQto8PT7dL5WXXp59fkdheMtlb71cZBDzI0fmgAKhynp\r\n"
"VSJYACPq4xJDKVtHCN2MQWplBqjlIapBtJUhlbl90TSrE9atvNziPTnNvT51cKEY\r\n"
"WQPJIrSPnNVeKtelttQKbfi3QBFGmh95DmK/D5fs4C8fF5Q=\r\n"
"-----END CERTIFICATE-----";

Please ensure that your certs are formatted as above, and let me know if you still encounter issues when trying to connect to AWS.

Regards,

Michael

Still testing but this didnt work. 

From what I can see, string format will be only \n at the end of every line, including the end certificate line.

Okay, I have managed to break past some of the issues I was having before but there doesn't seem to be much help for the issue I am getting now. 

The following is the function that the code is failing on. 

int32_t SlNetSock_startSec(int16_t sd, SlNetSockSecAttrib_t *secAttrib, uint8_t flags)
{
    int32_t    retVal = SLNETERR_RET_CODE_OK;
    int16_t    realSd;
    uint8_t    sdFlags;
    SlNetIf_t *netIf;
    void      *sdContext;

    /* Check if the sd input exists and return it                            */
    retVal = SlNetSock_getVirtualSdConf(sd, &realSd, &sdFlags, &sdContext, &netIf);

    /* Check if sd found or if the non mandatory function exists             */
    if (SLNETERR_RET_CODE_OK != retVal)
    {
        return retVal;
    }
    if (NULL == (netIf->ifConf)->sockstartSec)
    {
        /* Non mandatory function doesn't exists, return error code          */
        return SLNETERR_RET_CODE_DOESNT_SUPPORT_NON_MANDATORY_FXN;
    }
    /* StartSec function called, set bit                                     */
    sdFlags |= flags;
    /* Function exists in the interface of the socket descriptor, dispatch
       the startSec command                                                  */
    retVal = (netIf->ifConf)->sockstartSec(realSd, sdContext, secAttrib, flags);
    SLNETSOCK_NORMALIZE_RET_VAL(retVal,SLNETSOCK_ERR_SOCKSTARTSEC_FAILED);

    return retVal;
}

When it runs the following function, it returns non mandatory function doesnt exist

    if (NULL == (netIf->ifConf)->sockstartSec)
    {
        /* Non mandatory function doesn't exists, return error code          */
        return SLNETERR_RET_CODE_DOESNT_SUPPORT_NON_MANDATORY_FXN;
    }

Any help would be appreciated. Cheers.

Adam 

An update on this, I am getting an overflow when using SlNetSock_secAttribCreate()

Error remains : SlNetSock_startSec retruned -2021 as described 2 posts up. 

Any help would be greatly appreciated getting this integrated. 

Cheers,

Adam 

Hi Adam,

To clarify, are you trying to run the AWS IoT plugin on top of the MSP432E4 ethernet stack? I was somehow under the impression that you were using the CC31xx Wi-Fi device interfaced with the MSP432E4 as a host device. The needed debug steps are different depending on what device you use, and so far I have been providing instructions for the CC31xx.

Regards,

Michael

Hi Michael, 

The part number is in my first post. I am using the MSP432E401Y connected via Ethernet. 

Can you have a look at the stack as I seem to be getting a memory failure issue. Can you look into this with some real certificates and see if you are getting the same issue?

I have done nothing but what is instructed in the manual. 

All the best,

Adam 

Here is what my serial terminal says : 

Service Status: DHCPC    : Enabled  :          : 000



Service Status: DHCPC    : Enabled  : Running  : 000



Starting the AWS IoT example application



Network Added: 

If-1:10.30.30.25



Service Status: DHCPC    : Enabled  : Running  : 017



startSNTP: Current time: Mon Jun 21 20:44:06 2021





AWS IoT SDK Version 3.0.1-






Connecting...




ERROR: iot_tls_connect L#250 

SlNetSock_startSec retruned -2021






ERROR: runAWSClient L#142 

Error(-4) connecting to a3tbnoe8hq38io-ats.iot.us-west-2.amazonaws.com:8883




Subscribing...




ERROR: runAWSClient L#160 

Error subscribing : -13 




ERROR: runAWSClient L#221 

An error occurred in the loop. Error code = -13

Hello?