[Solved] Bench with counting capabilities

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17

Okay, I'm not sure quite what you mean by that; is it a mechanical problem, or a programming problem?

As an update I'm posting the current code I'm using below:

const byte numberOfSensors = 10;

int ldr_pins[numberOfSensors] = {
  A0, A1, A2, A3, A4, A5, A6, A7, A8, A9};
int now[numberOfSensors] = {
  0,0,0,0,0,0,0,0,0,0};
int then[numberOfSensors] = {
  1000,1000,1000,1000,1000,1000,1000,1000,1000,1000};

int counterPin = A10; //Sets Analog 10 to Counter

const int THRESH = 200; //Sets threshold value to 200

void setup(){
  pinMode(counterPin, OUTPUT); //Sets Counter to OUTPUT
  pinMode(13, OUTPUT); //Sets Pin 13 the LED to Output
  Serial.begin(9600);
}

void loop(){
  int flag = false;

  for (int i = 0; i < numberOfSensors; i++) {
    now[i] = analogRead(ldr_pins[i]);
    Serial.print ("now [i] =");
    Serial.println (now [i]); //debugging
    if (now[i] > (then[i] + THRESH) )   {
      flag = true;
    }
    then[i] = now[i];
  }

  if (flag) {
    digitalWrite(counterPin, HIGH);
    digitalWrite(13, HIGH); 		
    Serial.println ("Someone sat on the bench."); // more debugging
  } 
  else {
    digitalWrite(counterPin, LOW);
    digitalWrite(13, LOW);	
  }
}