IR sensor stairs

Projects Programming
1

Hi,
I'm working on IR sensors stair projeck and now I trapped with programing.
what I want to build looks like this: SEQUA® Automatische LED-Treppenbeleuchtung (Sensorgesteuert) - Automatic LED stair-light controller - YouTube
but I want better with all posible ways.

I use 4 IR sensor like this: http://www.ebay.com/itm/Smart-Car-E18-D50NK-Infrared-Obstacle-Avoidance-Sensor-Proximity-Switch-3-50cm-/121320028394?pt=LH_DefaultDomain_0&hash=item1c3f3cb8ea

why 4 sensors? Because with 2 sensors I cant use all posible ways.
my vision about all posible ways:

1, 2, 3, 4 are sensors
red line is IR radius
brown line is how man cross IR radius

1 man cross nr1 radius
2 man cross both nr1 and nr2 radius
3 man cross only nr2 radius
4 man cross nr3 radius
5 man cross both nr3 and nr2 radius
6 man cross only nr2 radius

http://postimg.org/image/ay29uq3m5/

the same way is if man start using stairs from other side

http://postimg.org/image/7ys5g06ov/

I need 4 IR sensors to count people

http://postimg.org/image/7h1ldw6hr/

One man change his mind and turn back

http://postimg.org/image/kkb8c1wg1/

Both change minds and turn back

http://postimg.org/image/oocfe9lhf/

the same goes if they start using stairs whith other side
Next thing why I need to know how many people using staris and began to climb side is turn on LED's
If first man start using stairs from left:
Led1...Led2...Led3...Led4...ON
if first man start using staris from right:
Led4...Led3...Led2...Led1...ON
If last man finish using stairs to right:
Led1...Led2...Led3....Led4...OFF
If last man finish using staris to left:
Led4...Led3...Led2...Led1...OFF

here is my code:

//#include "Tlc5940.h"

const int s1=5;  //Sensor NR1 
const int s2=4;  //Sensor NR2
const int s3=3;  //Sensor NR3
const int s4=2;  //Sensor NR4

int s1State=0;  //Sensor NR1 no active    
int s2State=0;  //Sensor NR2 no active  
int s3State=0;  //Sensor NR3 no active  
int s4State=0;  //Sensor NR4 no active  

int led1 =  50; 
int led2 =  51;
int led3 =  52;
int led4 =  53;

int a=0;  //Sensor NR1 was activated
int b=0;  //Sensor NR2 was activated
int c=0;  //Sensor NR3 was activated
int d=0;  //Sensor NR4 was activated

int z=0;  //People count

int ledON=0;  //LED's are off

void setup() {
  //  Tlc.init();

  pinMode(s1, INPUT); 
  pinMode(s2, INPUT);
  pinMode(s3, INPUT);
  pinMode(s4, INPUT);

  pinMode(led1, OUTPUT);  
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
}

void loop(){
  s1State = digitalRead(s1);
  s2State = digitalRead(s2);
  s3State = digitalRead(s3);
  s4State = digitalRead(s4);

  //=====================================Vieno sensoriaus palietimas
  //=====================================First sensor active

  if(s1State==LOW && s2State==HIGH){
    a=1;
  }
  if(s2State==LOW && s1State==HIGH){
    b=1;
  } 
  if(s3State==LOW && s4State==HIGH){
    c=1;
  }
  if(s4State==LOW && s3State==HIGH){
    d=1;
  }
  //=====================================Dveju sensoriu palietimas pradedant lipti
  //=====================================Two sensor active then start using stairs

  if(s1State==LOW && s2State==LOW && a==1){
    z=z+1;
    a=a+1;
  }
  if(s4State==LOW && s3State==LOW && d==1){
    z=z+1;
    d=d+1;
  }
  //=====================================Dveju sensoriu palietimas baigiant lipti
  //=====================================Two sensors active then finish using stairs

  if(s2State==LOW && s1State==LOW && b==1){
    z=z-1;
    b=b+1;
  }
  if(s3State==LOW && s4State==LOW && c==1){
    z=z-1;
    c=c+1;
  }
  //=====================================SAUGIKLIS
  //=====================================Fuse

  if(a==2 && b==1){
    a=0;     
  }
  if(b==2 && a==1){
    b=0;
  }
  if(c==2 && d==1){
    c=0;
  }
  if(d==2 && c==1){
    d=0;
  }

  if(z<0){
    z=0;
  }
  //=============================================================================================================


  //=====================================Sviesa isijungia
  //=====================================LED's ON

  if(z==1 && ledON==0 && a==2){
    digitalWrite(led1, HIGH);
    delay(500);
    digitalWrite(led2, HIGH);
    delay(500);
    digitalWrite(led3, HIGH);
    delay(500);
    digitalWrite(led4, HIGH);
    delay(500);
    ledON = 1;
  }
  if(z==1 && ledON==0 && d==2){
    digitalWrite(led4, HIGH);
    delay(500);
    digitalWrite(led3, HIGH);
    delay(500);
    digitalWrite(led2, HIGH);
    delay(500);
    digitalWrite(led1, HIGH);
    delay(500);
    ledON = 1;
  }
  //=====================================Sviesa issijungia
  //=====================================LED's OFF

  if(z==0 && ledON==1 && c==2){
    digitalWrite(led1, LOW);
    delay(500);
    digitalWrite(led2, LOW);
    delay(500);
    digitalWrite(led3, LOW);
    delay(500);
    digitalWrite(led4, LOW);
    delay(500);
    ledON=0;
  }
  if(z==0 && ledON==1 && b==2){
    digitalWrite(led4, LOW);
    delay(500);
    digitalWrite(led3, LOW);
    delay(500);
    digitalWrite(led2, LOW);
    delay(500);
    digitalWrite(led1, LOW);
    delay(500);
    ledON=0;
  }


}

I dont know there is problem in code.
Dont know why but sensors LOW means that someone corss IR radius and HIGH means that no one corss IR radius

2 
  if(s1==LOW && s2==HIGH){
    a=1;
  }

And, if not, what value should a have?

  if(s1==LOW && s2==LOW && a==1){
    z=z+1;
    a=a+1;
  }

The names a and z convey NO information. It is impossible to guess what this code is supposed to do.

  if(z=1 && ledON==0 && a==2){

Does this make sense? Why are there some = and some == in the same if statement?

I dont know there is problem in code.

You don't? It either does what you want, and there is not a problem, or it doesn't, and there is a problem.

Of course, what the code actually does is a mystery, and the pictures don't help with defining what you want. Sensors 1 and 2 are either at the top of the stairs, or they are at the bottom. They don't change location depending on which direction someone approaches the stairs from.

3 
  if(s1==LOW && s2==HIGH){
    a=1;
  }
And, if not, what value should a have?

a = 0
z = 0

int a=0;  //Sensor NR1 was activated
int b=0;  //Sensor NR2 was activated
int c=0;  //Sensor NR3 was activated
int d=0;  //Sensor NR4 was activated

int z=0;  //People count

if(z=1 && ledON==0 && a==2){

my mistake, it should look like this:

if(z==1 && ledON==0 && a==2){
4

And, if not, what value should a have?

a = 0
z = 0

So, where is the code to make that happen?

int z=0;  //People count

or

int peopleCount; // Hey, look, no stupid comment needed.
5 
So, where is the code to make that happen?

in the beginning

All comments I write in my language and only now I put english comments

if you dont want to help me dont say nothing, I do not need your comments, which just wants to poke fun at

6

Cool project, hope you get it working.

My suggestion: Start with just one sensor and get it working and then move on to nd 2, then the 3rd , then the 4th sensor. Will make things musch easier for you.

Its not clear how close the sensors are. Make sure they don't interfere with each other!

7

Thanks, finaly work like I want to. I'm not a good programmer so code is not written in the best but it works, so now I have to improve code. Very helpful was Serial Monitor in arduino program, through Serial Monitor checks all variables step by step and find what was wrong. Earlier I wrote all variables in the paper and so make mistakes.