PEAK-System Forum

Hi,

I am using PCAN GPRS Link. I am using the reference code and facing some issues with GPRS Modem. I found that GPRS Modem gets unregistered from GPRS Network very frequently and while trying to register back on GPRS Network, GPRS Modem gets "Reset". I am not sure what is happening here. Will it be possible to get Source code for GPRS Modem Firmware ? and steps to flash it ?

Regards,
Ashwin

Hi Ashwin,

there is no proprietary firmware from us running on the modem. It runs a default Open AT firmware. You could get some further documentation and other stuff from sierra wireless (http://www.sierrawireless.com/ - registration required).

Regards,
Stephan

Hi Stephan,

Thanks for your support.

Will it be possible for you to share source code for LIB_Link-GPRS-D.lib ?

Regards,
Ashwin

Hi Ashwin,

unfortunately it is not, but there is an example file contained in delivered sources that could be a starting point for a reimplementation of functions likely to the ones contained in the lib (OwnGPRS.c).

Regards,
Stephan

Hi Stephen,

No problem.

I am using GPRS LIb and I observed frequent RESET of GPRS Modem. Can you tell me in what circumstances (AT+CFUN=1) is sent to GPRS modem ?

Regards,
Ashwin

Hi Ashwin,

the reset comand is send in rest state of the statemachine if data channel is closed.

This state is entered if:

• - errors occurred within the state machine
  - unspecified error from modem
  - peer has closed the connection (+WIPPEERCLOSE)
  - CME ERRORs: 811,842 and others then 10, 515, 812, 843
  - timeouts - when modem is not responding for some time

Regards,
Stephan

Thanks for your help, Stephan.

Regards,
Ashwin