Arduino UNO 4-Wheel Autonomous Vehicle C Code for Ultrasonic Obstacle Avoidance

hi, i am an electronics engineering student and making a project on the Aurduino Uno board and it's a 4-wheeled vehicle it should achieve it's inputted target and also avoid obstacles placed on the path it follows with the help of an ultrasonic sensor.....but i am recently facing the interfacing problem in it can any one help me?? Actually i need help in Coding on C-language because i don't know much about this language....

What kind of help you need?
guidance for programming? placing sensors & interfacing with microcontroller?
i have not used arduino. i work with PIC & AVR controllers, interfacing your sensors with microcontroller is easy.

i want guidance in programming...

Did you write any logic for your program? How the sensors are supposed to work, what do you mean by inputted target? does that mean you are using a remote or something like that? or it supposed to be an autonomous vehicle?

Inputted target means inputting the co-ordinates by a keypad because without any input how the robot will able to know the path and the target to achieve??

There are various ways to "input a target", such as:
1. File transfer.
2. Image from camera.
3. Verbal.
4. Joystick.
5. Touch screen.
6. Eye movements.
7. Electrical signals from the brain.
8. And, of course, keyboard.

And, you said nothing about "coordinates" being the target. This is to be an autonomous robot, correct? If so, then how can you expect us to conclude that "coordinates" will be it's goal. Why not:
1. Heat?
2. A color?
3. A gas or substance?
4. The end of a line it will follow?
5. A shape or even a face?
6. ???

Unless you are more specific, we can't help you.

And, it sounds like you want full instruction in the C language. I doubt if you will find that here. If you have a specific question or problem, I'm sure we'll be happy to give it a shot, but you'll need to, at least, go out and get the basics (like learning the C language and not expecting us to teach it to you -- or even for us to write the whole program for you).

At least provide some actual logic, as Syed requested

Thank you steve for detailing:-), So now Nihal if you need our help you must help yourself brother.
prepare a schematic/layout of what you want & all, we will help you in clearing your doubts but you will have to start on your own, get your hands dirty!
All the best!

The best method to begin any programming of this type is to study the types of events that will occure user interactions Robot interactions or if you like uml

Here is an address for you where you can download a opensource version of star uml to chart case studiies. , used case etc

www.staruml.com

Im not that brilliant with this but I have a reasonable understanding of achieving this by hand

This is more concerened with event modelling i.e. IN your case what you see as happening first and how your robot will deal with those messages

It would also suggest some research into an area particularly with robotics termed Fuzzy logic

In case it might confuse the nubie, that's "use case" not "used case".

Beg your pardon eyesight isnt that good these days steve so please try and bare with me as Im also using smart phone via 3g networks

I should have also pointed out that although I appreciate he is using arduino due Microchip have just released a free full c, c++ compiler for PIC32 range which is available on thier website

If nothing else it will at least help the gentleman to become aquainted with some c without massive expenses

I hope that helps

No problem. Just keeping it real

This is as real as this gets at the moment Steve for some of us lets put it that way Thats mild at the moment in the Uk

Not a bad way to spend xmas is it Steve and we still manage to put projects on the web hopefully to create employment May not be quite up to your standards but thats reality for some of us

Last year I spent a year in a shed made from wooden pallets with tempetatures below sub zero no heating and at times no electric

This is what happens when companies refuse to pay people on time They end up losing thier homes This can happen to anyone no matter how big your company is but in general this is the net result of modernisation, people without training or even uni students unable to pay bills or gain employment

Im being really polite about this and truthfull

Not really that funny is it

Sorry, can't make out what you're trying to say, or what that is in the photo?!?

Tell you what im going to do Im going to let you think very hard about this and then you come and talk to me when youve experianced some of this and perhaps you might like to comment on what you possibly class as engineering standards and company policy How about that for you Perhaps simultainiously you might also whish to discuss some of the corperate company managers who are partially responsible for situations such as this when they make descisions that prevent other bussiness concerns from trading for a whole year leading to massive redu dancies and discuss whithin this topic How you envisage they might undo some of this damage

That might be quite interesting particularly with a view to number of schools closing colleges and downturn in students etc at universities possibly with an emphasis on the so called throw away age and the social impact this is having on society

I note Maplins dont have any xmas projects this year on display also Elector magazine doesent have any xmas projects which they normally do in thier current november issue

You sound upset. I'm sorry if I offended you. I just can't make out what you're saying. I don't even know what the topic of the conversation is

No you havent offended me steve I put alot of this down to experiance sometimes Im just as guilty of this myself sometimes where we dont think and see what we oy want to see It can be upsetting at times Ive been fortunate or unfortunate enough bit of both I think to see and experiance some of this first hand though if nothing else it opens your eyes and makes you think on a far wider scale And if anything makes you a better person in some respects to appreciate that lots of subjects could be a lott better couldnt they hmmm

It isnt good at the moment for anyone

http://live.vodafone.co.uk/html/defaultx.aspx...ufi=3&typxm=NewsPage&segitemid=09092011175353

Sorry: you put _what_ down to experience? You are guilty of _what_? _What_ can be upsetting at times? See and experience _what_ first hand? _What_ isn't good at the moment?

I seem to have lost the thread of this conversation somewhere.

Steve this article is in the Elektor electronics magazine for arduino believe it or not with gps navigation I knew there was something odd about this question The article was featured in July /August 2007 and has many constructional articles about all types of robots in the magazine

Here is the article see photo below