sending AT commands to wavecom through C code

[johnb4u]

Hi all,


I am testing sending sms through wavecom module.

I tested with minicom, its responding correctly..
commands are
AT
OK

AT+CMGS="mobilenum" (then press Enter key)
>"message" (then press ctrl+z)

its sending sms properly.

Same thing i want to implement using a code.

I am able to open serial port and done initialization


now i want to send AT COMMANDS to wavecom modem using C code.

can any one provide sample code for this.

Thanks in advance

John

[Rubberman]

1. Open the device: FILE* fp = fopen(devname,"w+");
2. Use fprintf() or fwrite() to output the string. Ie, fprintf(fp, "AT\n");
3. Use fscanf() or fread() to read the reply data.

Have fun!

[johnb4u]

1. Open the device: FILE* fp = fopen(devname,"w+");
2. Use fprintf() or fwrite() to output the string. Ie, fprintf(fp, "AT\n");
3. Use fscanf() or fread() to read the reply data.

Have fun!

Thanks for your reply..

could you please elobarate it.
FILE* fp = fopen(devname,"w+");
here devname is serial port id?
i am using /dev/ttyS0/
can i use like this : FILE*fp = fopen(/dev/ttyS0, "w+");
any delay is needed after sending any commands to wavecom?
if yes how much ? I am using Q24series.
I am really new to this

your help is appreciated

Thanks
in advance

john

[Rubberman]

FILE* fp = fopen(devname,"w+");
here devname is serial port id?
i am using /dev/ttyS0/
can i use like this : FILE*fp = fopen(/dev/ttyS0, "w+");
any delay is needed after sending any commands to wavecom?
if yes how much ? I am using Q24series.
I am really new to this

This is very basic stuff. You should get an intro to C programming book on how to do this.

As for your question using /dev/ttyS0, if that is the port your wavecom device is connected to, then yes, that is correct. As for delay, you can use a blocking read which will wait until the device returns some reply. At this point, getting into timed I/O using open/select/read instead of fopen/fprintf/fread is way more complicated than you need to concern yourself with.

Again, get an introduction to C programming (from Amazon.com or others like them) to learn the basics. There are also some tutorials on the net you should be able to find with a google search pretty easily. Here is one to get you started: Introduction to CProgramming