CC3220SF: HTTPS request error with Temboo SDK

Cormac Driver

Part Number: CC3220SF

Hi there,

I work at Temboo, and a customer has reported a problem when running a Temboo program on their CC3220 via CCS Cloud. It seems that something has changed (perhaps in the Simplelink SDK) that has broken how the Temboo SDK in CCS Cloud uses TLS/SSL. We can build projects without issue, but HTTPS requests to the Temboo server fail. The error shown in the console is:

[SOCK EVENT] - Unexpected Event [20x]

We can manually edit a project so that requests are made to Temboo on port 80 and don't use TLS, and in this case our requests will succeed. Do you have any advice on how best to resolve this issue and make Temboo requests over TLS/SSL succeed again?

Thanks a lot,

Cormac

over 4 years ago

0 Michael Reymond over 4 years ago

TI__Mastermind 40965 points

Hi Cormac,

Some more information will be needed to debug this HTTPS/TLS error.

1. Have you tried using the non-cloud version of CCS, and especially with an older SDK + servicepack? The chance of TLS breaking due to a new update is slim, but worth trying this step to eliminate the possibility.

2. Is there any additional error info that the CC3220 provides to you? Also, where in the process of the HTTPS request does the connection fail? Is the TLS connection established successfully, or does it fail before then?

3. Could you collect the NWP logs from the device? See my instructions in this thread for details on how to collect those logs:

https://e2e.ti.com/support/wireless-connectivity/wi-fi-group/wifi/f/wi-fi-forum/987169/cc3220s-sl_connect-issue/3654660#3654660

With those logs, I will be able to trace through the TLS connection and see precisely where the connection fails.

Regards,

Michael

0 Cormac Driver over 4 years ago in reply to Michael Reymond

Prodigy 20 points

Thanks for the detailed response Michael, much appreciated! We'll dig into those questions and suggestions and get back to you with an update as soon as possible.

Talk soon,

Cormac

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CC3220SF: HTTPS request error with Temboo SDK