I am trying to make a GPRS connection between a microcontroller (m16c) with the stack (tcp or ppp) and a computer connected to internet (eg webserver, or another GPRS enabled device.).Regarding this i have a couple of questions..
1) Is it possible to have a GPRS connection over TCP/IP stack (in M16C)? anybody have any idea/website about such implementation.
2) Is it possible to have GPRS connection over PPP stack? anybody have any idea/website about such implementation.
If both can be used which is better ?
3) One last question ..if i have a stack (UDP) already and also have a GPRS modem ..how do i initiate data transfer i mean after i program the m16c microcontroller with the stack how do initiate data transfer.
I am usin siemens M35 terminal which is GPRS enabled.. i have tried PDP context activation(using hyperterminal) and also attached to network using at commands like at+cgdcont and at+cgact that is fine it attaches to the network (as can be seen by indicating LEDs) but the problem is i cannot initiate any data transfer if i try the command at+cgdata=ppp,1 it shows some garbage characters and after a while shows NO CARRIER . i guess because hyperterminal by itself cannot do this data exchange ? then how can it be done assuming i have a TCP or UDP stack for my microcontroller.. also is there any AT commands using which i can use the modem to reach a desired IP address for example connect to a same web server whose IP address is known...
If im headed in a wrong direction please point me to the correct path
Sincerest thanks for any replies to any question / any suggestions / examples / related URL.. and of course for spending time on my post
Thanks
regards
anant
1) Is it possible to have a GPRS connection over TCP/IP stack (in M16C)? anybody have any idea/website about such implementation.
2) Is it possible to have GPRS connection over PPP stack? anybody have any idea/website about such implementation.
If both can be used which is better ?
3) One last question ..if i have a stack (UDP) already and also have a GPRS modem ..how do i initiate data transfer i mean after i program the m16c microcontroller with the stack how do initiate data transfer.
I am usin siemens M35 terminal which is GPRS enabled.. i have tried PDP context activation(using hyperterminal) and also attached to network using at commands like at+cgdcont and at+cgact that is fine it attaches to the network (as can be seen by indicating LEDs) but the problem is i cannot initiate any data transfer if i try the command at+cgdata=ppp,1 it shows some garbage characters and after a while shows NO CARRIER . i guess because hyperterminal by itself cannot do this data exchange ? then how can it be done assuming i have a TCP or UDP stack for my microcontroller.. also is there any AT commands using which i can use the modem to reach a desired IP address for example connect to a same web server whose IP address is known...
If im headed in a wrong direction please point me to the correct path
Sincerest thanks for any replies to any question / any suggestions / examples / related URL.. and of course for spending time on my post
Thanks
regards
anant
