I have tested below command sequence with UL865-EUD (12.00.616) module, everything is working fine. But when we are using same command sequence with HE910-EUD (12.00.226) module, getting operation not supported error of #DWCONN command.
Do I need any CA or any other certificate?
+CME ERROR: SSL already activated
+CME ERROR: operation not supported
Please help us to resolve the issue.
As far as I can see, you set the SSL configuration in order to use a RootCA certificate with
(the third parameter to 1 means “manage server authentication”, the fourth means DER format – Binary- )
However, I cannot see from your log any command to store the RootCA certificate.It surprises me that it works on the UL865-EUD module, maybe the certificate is already stored?
To resolve this issue, you can either
– set SSL in order not to verify server authentication with
– store the certificate using AT#SSLSECDATA command
Also, remember that you should send AT#SSLEN=1,0 before the AT#DWCONN=1 command, since the devicewise command will enable the SSL encryption internally and expect it to be disabled.
I suggest the first approach to verify if everything works, since the firmware version is quite old
Thanks for your reply. I have not flashed any certificate in UL865-EUD module.
I will check you’re the suggestion and let you know the testing result on HE910-EUD module.
Meanwhile, can you share DW certificates and HE910-EUD module latest firmware?
The firmware is in the Download Zone and for the SSL there is a procedure described in Telit SSL TLS User Guide, “How to Get the CA Certificate” chapter.
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Knowledge Base & Download Zone