Hello, I have a board with a EG915U-EU module. I am trying to make a TCP connection to our server and receive this error: “+CME ERROR: invalid command line”
Here is a log of some command sequence:
+CME ERROR: Operation not allowed
AT+QIOPEN=“TCP”,“xx.xx.xx.xx”,9003 (Real IP edited)
+CME ERROR: invalid command line
Also, this firmware revision ( EG915UEUABR03A21M08_OCPU_QPY ) seems to be an open cpu version.
The questions are: Is this actually an open CPU firmware? If yes, is this the reason many AT commands are not supported? Is there a different way to set a TCP connection? If not, why does this happen and how to solve it?
I am new to Quectel and don’t know what makes the module Open CPU, if its just the firmware or the Hardware or both. If its a firmware only feature, I would like to have the latest firmware of both Open CPU and not open CPU versions, so I could switch versions to test different applications.
Thank you in advance
I am attaching a picture of the module