BGS2 Not working with 1v8 SIM Cards | Thales IoT Developer Community
November 2, 2015 - 9:26am, 2426 views
Hi, I'm looking for some help with your Cinterion BGS2 GSM Modem.
We use this modem in one of our products, but we have recently discovered that the Modem does not appear to work with 1v8 SIM Cards, but it does work with 3V SIM cards.
At this moment we haven't done any in depth debugging with this modem as we've been having a similar problem with another manufacturers GSM modem where their latest firmware won't work with 3V SIM cards but will with 1v8 SIMs...
If you have any pointers on where to start with this, it would be very much appreciated.
Kind Regards,
Liam
Hello,
The module should be working with both SIM cards.
Maybe there's a problem in hardware. Is the modem placed on your proprietary hardware? There is a pull up resistor needed for the SIM interface for this module - you can check the details in the module's hardware description document.
Regards,
Bartłomiej
Hi, apologies for the delay in getting back to you.
Thanks for your response. We have the 4k7 pullup, and yes the modem is placed on our PCB.
Hello,
How about other requirements from the hardware description? Do you have a DSB board or other developer board on which the module should be working correctly for comparison? How about the other manufacturer's module you have tested - did you have the developer board from the module provider? At the moment the most probable source of the problem would still be the hardware.
Regards,
Bartłomiej
Hi, thanks for your response.
No we do not have a developer board for this module. As far as I am aware the hardware specifications have been followed correctly - I am not the electronic engineer, only software and unfortunately not the software engineer who developed the code which interfaces with the BGS2.
I will enquire about getting a development board so we can run some comparisons.
As for the other module I mentioned in my original post, that is used on significantly different hardware and we have pin-pointed that issue to a modem firmware issue. Their newer firmware doesn't work correctly, downgrading to older firmware and the modems work as expected, although trying to get help from the manufacturer is like getting blood out of a stone. We're also hearing from our PCB manufacturer that the modem is now obsolete - which probably explains the lack of willingness to help from the manufacturer.
Regards,
Liam
Hello Liam,
Pleas also provide me the ATI1 response so I could check what firmware version you are using.
How do you test this problem? Do you have any log from AT interface? What does the 'AT^SCKS?' command reply?
Regards,
Bartłomiej