how to use at command in c programming of keil compiler . i use 89s52 micro controller . my concept is if any fire accident occurring in my home means it send sms to me . so please send program to my email id (rk9047545247@gmail.com)
The other issue is that people think there are ready code to post. They don't realize that real programs is the combination of a large number of modules - and many of these modules are specifically adapted to fit together with the neighbour modules.
There are not "one" word processor. There are not "one" compiler. There are not "one" photo editor. There are not "one" SMS gateway. There are not "one" home alarm.
So there can't exist "one" code that can be mailed out to anyone interested. People who don't have the skill to understand "the code" and adapt it according to the specific requirements don't have any use for web-published code or for requesting code. They have to settle for buying a consultant to do that custom adaptation - or better yet supply a turn-key solution.
A problem here is that people who ask for code thinks that 100 or 1000 source code lines represents a large program. So they think that there must be existing programs for everything - it's just a question of finding where it is. That even an embedded device can contain software with a million source lines or more are totally impossible to grasp. And that just the modem module may contain the result of a million lines of code, and have lots of custom-adapted AT commands is inconceivable. Code works best if matched to the AT command documentation for the specific modem, unless the code is guaranteed to just use a subset of instructions that are suitably "standardized".
People who don't have the skill to understand "the code" and adapt it according to the specific requirements don't have any use for web-published code or for requesting code.
my, often repeated, comment "if you can't code it yourself, downloaded code is worthless" restated
Erik