GPRS Modem Firmware

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ashwink
Posts: 4
Joined: Wed 28. Jan 2015, 16:06

GPRS Modem Firmware

Post by ashwink » Wed 28. Jan 2015, 16:11

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

S.Michaelsen
Hardware Development
Hardware Development
Posts: 73
Joined: Fri 10. Sep 2010, 13:11

Re: GPRS Modem Firmware

Post by S.Michaelsen » Wed 28. Jan 2015, 16:24

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

ashwink
Posts: 4
Joined: Wed 28. Jan 2015, 16:06

Re: GPRS Modem Firmware

Post by ashwink » Thu 29. Jan 2015, 11:40

Hi Stephan,

Thanks for your support.

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

Regards,
Ashwin

S.Michaelsen
Hardware Development
Hardware Development
Posts: 73
Joined: Fri 10. Sep 2010, 13:11

Re: GPRS Modem Firmware

Post by S.Michaelsen » Thu 29. Jan 2015, 12:58

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

ashwink
Posts: 4
Joined: Wed 28. Jan 2015, 16:06

Re: GPRS Modem Firmware

Post by ashwink » Thu 29. Jan 2015, 14:33

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

S.Michaelsen
Hardware Development
Hardware Development
Posts: 73
Joined: Fri 10. Sep 2010, 13:11

Re: GPRS Modem Firmware

Post by S.Michaelsen » Thu 29. Jan 2015, 15:21

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

ashwink
Posts: 4
Joined: Wed 28. Jan 2015, 16:06

Re: GPRS Modem Firmware

Post by ashwink » Thu 29. Jan 2015, 15:56

Thanks for your help, Stephan.

Regards,
Ashwin

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