micro controller based security system using sonar

Hi, I'm a student engineer in telecommunication and I have a project to do on micro controller based security system using sonar. As I'm new to all this, I will be grateful if someone could help me in designing the project. Any advice will be most welcomed.
Thanking you for your kind consideration.

DenisTheOne:
Any advice will be most welcomed.

Identify the precise goal of the project. Identify and document all the requirements that have to be met in order to achieve that goal. Ensure that the requirements are all testable, and decide how you will test them.Design a solution that meets all of the requirements. Identify problems that need to be solved before you can implement that solution. Solve them. Implement the solution. Test is against the requirements.

Have a 'plan B' at the back of your mind in case the overall project turns out to be too ambitious. For example it may be that some subset of the overall solution would be valuable even if you can't complete the whole thing.

Basically, my sonar should be mounted on a stepper motor which will can a room. I want to include also a GSM shield which will enable me to send a text to inform of any unusual presence. I'm willing to use arduino products that are arduino uno micro controller, GSM shield, breadboard and stepper motor. What can you advice me? I'm pretty new to al this.

DenisTheOne:
What can you advice me?

Don't make things too complicated.

Sonar is usually underwater. We'll assume you mean ultrasonic.

Ultrasonic sensors are more commonly used kind of like range finders- althoug object detection can be part of that. You may want a PIR movement sensor. Not enough info to tell.

Stepper motor. Just scanning about might be accomplished by a US$5 servo. With a PIR you might not even need/want to scan about.

With a PIR you might not even need a microcontroller.

More info.

These are the requirement of my project... I would be very happy if it was more simple. Here's the complete title:
Micro controller based security system using SONAR.
Description: This project is based on the principle of RADAR. This project has got a SONAR module mounted on a stepper motor. As the stepper rotates, SONAR module sends out ultrasonic waves and scans the room.
Advice?

Simple Bayesian learning algorithm, using histogram binning
If a reading at a particular angle falls outside the learned ranges, sound the alarm.
(I'm OK with sonar)

That has been done many, many times, so you should be able to get lots of ideas from an internet search.

I have some troubles with the c++ codes to be used. I encountering some difficulties to program the stepper to rotate. Any idea of the codes I should use?

Have you tried the stepper motor libraries?

The inbuilt codes for stepper in the arduino's IDE? I managed to program it but now I'm having problems with the SONAR 6500 series module, still codes problem... Any advice?

still codes problem... Any advice?

If you could just lean a little more to your right, I could get a better view of your screen. . .

Don't get you...

Nor me you.

I'm having problems

And they are?

I must program a 6500 series SONAR to do a room scan. The SONAR module should be mounted on a stepper motor which will make it rotate for it scan the room. If there's any movement in the room, the SONAR should detect it and alert me in some way. I really don't know how to program the SONAR module to do that. Can you help please?

I don't have a 6500 series sonar (Whatever it is: hint, and I'm unlikely to obtain one), but if you post your code, I may be able to work through it with you.

You seem to be asking multiple questions and it's not clear what you really need help with.

You need to control a stepper motor. Can you do that?

You need to read a distance using your sonar sensor. Can you do that?