Couldn't connect to Azure IoTHUb over SSL with BG96

IoT Modules LPWA Module
1

Hello,

I’ve the modem BG96 and trying to open a secured socket to Azure IoT Hub.
Althoug, a non secured socket is opened successfully, a secured one doesn’t work and always got the response +QSSLOPEN: 0,550

image
image647×814 56.4 KB

I also tried
AT+QSSLCFG=“sslversion”,0,4
AT+QSSLCFG=“ciphersuite”,0,0XFFFF
AT+QSSLCFG=“seclevel”,0,0

with no effect on the result code

2

sorry error 550 means unknown err

image

I attached two successful log for your reference

https://cnquectel-my.sharepoint.com/:f:/g/personal/america-fae_quectel_com/EhnjdN0lxvhCmWmwZnYE05YBTPnwgkqAZ2fhZut6p9VgJQ?e=mo1Ghu

anymore issue ，pls send emal to support@quectel.com