SPWF01S TLS connection work with Rel 3.4 and fail with 3.5

egoltzman · ‎2017-09-12

Posted on September 12, 2017 at 22:34

Hello,

I have two sets of NucleoF401RE+SPWF01S, on one I have

Version 3.4 SPWF01S-150410-c2e37a3

And on the other

Version 3.5 SPWF01S-160129-c5bf5ce

I run the same application that connect to AWS IOT over TLS, the 3.4 version is working fine and connected to AWS successfully, the 3.5 fail to connect.

Any idea what could be the problem?

Attached are the log of the two sessions.

Thanks,

Eyal

Gerardo GALLUCCI · ‎2017-10-29

Posted on October 29, 2017 at 13:33

This happens because certificate required by Amazon is 1.7KB in size, and SPWF01 is able to manage certificates up to 1.3KB in size. Check AN4683.

FW3.4 worked because more free RAM was available at that time. You can contact your ST contact to get a newer FW able to connect again.