I am developing some tracking application on modules Q2501, with Open AT 3.10, and i have a problem with GPRS. The ed_DialupConnectionStart() almost always returns ED_ERR_WM_GPRS_OPEN. I checked the IP library dokumentation, and it is said “Open GPRS internal session failed”. What does it mean? Is it internal module fault? I failed to find any detailed information about this error. So if any body knows any thing about this error i would be thankfull if you share it with me.
GPRS network in area where the module is located is good, i checked it with mobile phone.
My application calls functions in such order:
2: on “OK” ed_GprsSetConfig
3: after 30 second ed_dialupConnectionStart ( I get that error here)
4: ant there it should call ed_SocketTCPStart but ot never gets ther .
So i wonder, could it be the hardware problem?