SARA-R510M8S HTTPS/TLS consistently fails - DNS timeout and TLS handshake errors

Hello,

Does anyone know how to get latest firmware for SARA-R5?

HTTPS connections consistently fail on our SARA-R510M8S module, while plain HTTP works perfectly. We have tested extensively and documented the behavior.
We are not the only ones, btw, as the SparkFun examples page on Github state “Setting this to true causes the POST / GET to fail. Not sure why…“. The why is a good old bug that breaks DNS when TLS is involved.

The GPT Chatbot provided by U-Blox says:

There are newer firmware releases for SARA-R510M8S after 03.30 that improve:

* TLS stability

* DNS resolution during secure sessions

* Cipher suite compatibility

* HTTPS robustness

But where do you get such firmware? I sent a message on the u-bloc contact form but given the acquisition of the mobile activities by Trasna, whose support pages throws a 404, I fear it will take forever to get an answer…

It is also really weird that TLS can be broken on such platform. :grimacing: Nobody care about security?
If anyone can point me to a firmware source (official)…

Thanks!

The latest releases I found are from Feb 2024, and I also see an EOL/last shipment notice for Mar 2025, so I’m not certain…you might post on the u-blox forums and ask there, otherwise await a response from u-blox :-/

Thanks! The link you provided helps a lot.