GPRS / GSM Driver
in [Device Drivers]
|
From: astraweb on 9 Jun 2005 17:28 Hello, I'm writing an application (C++) which connects to a specialized server through the GPRS Network. I use a GPRS modem for which I have no driver (the manufacturer didn't publish any). I use Windows ras capability to connect to the server, and that's fine. The server can send some orders to my application using GPRS or SMS. This is why I also need to permanently read the SIM card and check whether I have a SMS message to decode. In fact, my application receives orders through GPRS or SMS and answer through GPRS. I know how to connect using rasdial functions. I also know how to read SMS using direct AT commands. But I can't figure how I can do these two things at the same time, without hanging the ras connection, which is not possible, due to delay considerations. When I am connected to the GPRS network, the serial port is not avalaible anymore, and I can't read SMS. I think I have to write a driver to split the serial port into 2 virtual serial ports. One will handle all GPRS communications, and I will read SMS on the other one. But I have no precise idea on how to do that. Your contribution will be really appreciated, I'm really lost ! Precision : I use Windows CE 4.2, but I think that the solution will be the same in W2K. Many thanks in advance !! Olivier
From: fat_boy on 10 Jun 2005 06:57 Hi, Sounds like you have hardware that has standard UART(S) so the system drivers can run the card as a modem with the system suupplied drivers. You can do AT commands to get SMSs via the modem port but, as you say, once dial up networking (ras) gets the modem into data mode (does PPP rather than AT), AT commands are either ignored, or kick the card out of data mode. However, you might have more than one UART/ Port on the card. Check in device manager with 'view devices by connection' set and see what you have. If you see another COM port alongside the modem port hanging off the card, try to open that in hyperterminal and send AT commands to it.
From: Olivier on 10 Jun 2005 16:17 Thanks for your answer, fat_boy You described correctly the problem I have, but as there is no driver for that specific GPRS modem, I only have one com port in the device manager, which is the physical com port. In fact, your answer gave me this idea : is there a standard GPRS device driver which will add 2 UARTs / ports where I only have one physical port ? I'll have a look to that point and I'll let you know. Many thanks, Olivier "fat_boy" <m.sykes(a)option.com> a ýcrit dans le message de news:1118401058.996536.268660(a)o13g2000cwo.googlegroups.com... > Hi, Sounds like you have hardware that has standard UART(S) so the > system drivers can run the card as a modem with the system suupplied > drivers. > > You can do AT commands to get SMSs via the modem port but, as you say, > once dial up networking (ras) gets the modem into data mode (does PPP > rather than AT), AT commands are either ignored, or kick the card out > of data mode. > > However, you might have more than one UART/ Port on the card. Check in > device manager with 'view devices by connection' set and see what you > have. If you see another COM port alongside the modem port hanging off > the card, try to open that in hyperterminal and send AT commands to it. >
From: Maxim S. Shatskih on 11 Jun 2005 13:08 No drivers for GPRS modems (only INF files). For the software, it is just a COM port which can accept the AT initialization strings. -- Maxim Shatskih, Windows DDK MVP StorageCraft Corporation maxim(a)storagecraft.com http://www.storagecraft.com "Olivier" <olb91(a)yahoo.fr> wrote in message news:e$5gXmfbFHA.1392(a)TK2MSFTNGP14.phx.gbl... > Thanks for your answer, fat_boy > You described correctly the problem I have, but as there is no driver for > that specific GPRS modem, I only have one com port in the device manager, > which is the physical com port. In fact, your answer gave me this idea : is > there a standard GPRS device driver which will add 2 UARTs / ports where I > only have one physical port ? I'll have a look to that point and I'll let > you know. > > Many thanks, > Olivier > > "fat_boy" <m.sykes(a)option.com> a ýcrit dans le message de > news:1118401058.996536.268660(a)o13g2000cwo.googlegroups.com... > > Hi, Sounds like you have hardware that has standard UART(S) so the > > system drivers can run the card as a modem with the system suupplied > > drivers. > > > > You can do AT commands to get SMSs via the modem port but, as you say, > > once dial up networking (ras) gets the modem into data mode (does PPP > > rather than AT), AT commands are either ignored, or kick the card out > > of data mode. > > > > However, you might have more than one UART/ Port on the card. Check in > > device manager with 'view devices by connection' set and see what you > > have. If you see another COM port alongside the modem port hanging off > > the card, try to open that in hyperterminal and send AT commands to it. > > > >
From: Olivier on 11 Jun 2005 13:34 Thanks Maxim, but I'm not sure I understand your answer : a lot of GPRS modem manufacturers publish drivers for their products (Siemens, Motorola...). I agree there is no need of a driver for GSM modems (they are just modems). For GPRS, it's not the same : I'll use the modem to connect the Internet (or a private network) using PPP, and in the same time, allows the use of SMS or voice calls. That's why I need a driver. The driver allows the modem to be used in "multiplex mode" : it creates 2 virtual ports, one is or can be connected to the GPRS network, via a RAS as an example, the other port is used to send AT commands, to read ad/or send SMS. I exactly need such a driver, or ideas to write it. Hope my question is clear enough. Thanks to anyone who could help. Olivier "Maxim S. Shatskih" <maxim(a)storagecraft.com> a ýcrit dans le message de news:Op6eCgqbFHA.2996(a)TK2MSFTNGP10.phx.gbl... > No drivers for GPRS modems (only INF files). For the software, it is just a > COM port which can accept the AT initialization strings. > > -- > Maxim Shatskih, Windows DDK MVP > StorageCraft Corporation > maxim(a)storagecraft.com > http://www.storagecraft.com > > "Olivier" <olb91(a)yahoo.fr> wrote in message > news:e$5gXmfbFHA.1392(a)TK2MSFTNGP14.phx.gbl... > > Thanks for your answer, fat_boy > > You described correctly the problem I have, but as there is no driver for > > that specific GPRS modem, I only have one com port in the device manager, > > which is the physical com port. In fact, your answer gave me this idea : is > > there a standard GPRS device driver which will add 2 UARTs / ports where I > > only have one physical port ? I'll have a look to that point and I'll let > > you know. > > > > Many thanks, > > Olivier > > > > "fat_boy" <m.sykes(a)option.com> a ýcrit dans le message de > > news:1118401058.996536.268660(a)o13g2000cwo.googlegroups.com... > > > Hi, Sounds like you have hardware that has standard UART(S) so the > > > system drivers can run the card as a modem with the system suupplied > > > drivers. > > > > > > You can do AT commands to get SMSs via the modem port but, as you say, > > > once dial up networking (ras) gets the modem into data mode (does PPP > > > rather than AT), AT commands are either ignored, or kick the card out > > > of data mode. > > > > > > However, you might have more than one UART/ Port on the card. Check in > > > device manager with 'view devices by connection' set and see what you > > > have. If you see another COM port alongside the modem port hanging off > > > the card, try to open that in hyperterminal and send AT commands to it. > > > > > > > > >
|
Next
|
Last
Pages: 1 2 3 4 5 Prev: PsRemoveLoadImageNotifyRoutine?? Next: Is it correct?SDIO CMD53 ,SDBUS_REQUEST_PACKET |