Trouble with tracker sensor code

fxtalz · March 9, 2024, 11:35am

So I am trying to make a car park for a school project. All is going well other than the tracker sensor. As you may know when a car is sensed at the entrance the tracker sensor is constantly inputting 1's and adding it to the count, this is resulting in the count going from 0-100 in a few seconds. I need it to only go from 0-8 as that is the amount of parking spaces in the carpark. I was going to use a do..while loop or a delay but I'm not sure what to do. I need assistance to make the Tracker sensor only read once when a car is placed infront, it gives a +1 to the count and waits till the car is gone and doesn't continue giving +1 but rather just 1 so that the counter can be displayed on a 7 segment. Thanks

#include "servomotors.h"
#include "7_segment.h"
const int tra1 = 2; // Entrance
const int tra2 = 7; // Exit
void setup() {
  servomotorSetup();
  segment_setup();
  Serial.begin(9600);
  pinMode(tra1, INPUT);
  pinMode(tra2, INPUT);
}
int TRA1, TRA2, count = 0;
void loop() {
  TRA1 = digitalRead(tra1);
  TRA2 = digitalRead(tra2);
  Serial.println(TRA1);
  Serial.println(TRA2);
  if (TRA1 == 1) { // Entrance
    servo_entrance_open();
    if (count == 0) {
      eight();
    } else if (count == 1) { // If 1 car display 7 (8-1)
      seven();
    } else if (count == 2) {
      six();
    } else if (count == 3) {
      five();
    } else if (count == 4) {
      four();
    } else if (count == 5) {
      three();
    } else if (count == 6) {
      two();
    } else if (count == 7) {
      one();
    } else if (count == 8) {
      zero();
    }
  } else if (TRA2 == 1) { // Exit
    count = count - 1;
  }
  Serial.println(count);
}

const int SEG_A = 3;
const int SEG_B = 4;
const int SEG_C = 12;
const int SEG_D = 13;
const int SEG_E = 9;
const int SEG_F = 10;
const int SEG_G = 11;

void segment_setup() {
  pinMode(SEG_A, OUTPUT);
  pinMode(SEG_B, OUTPUT);
  pinMode(SEG_C, OUTPUT);
  pinMode(SEG_D, OUTPUT);
  pinMode(SEG_E, OUTPUT);
  pinMode(SEG_F, OUTPUT);
  pinMode(SEG_G, OUTPUT);
}
// SEG_A Top
// SEG_B Top Left
// SEG_C Middle
// SEG_D Top Right
// SEG E Bottom Right
// SEG F Bottom
// SEG G Bottom Left

void zero() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void one() {
  digitalWrite(SEG_A,LOW);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void two() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_E,LOW);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void three() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,LOW);
}

void four() {
  digitalWrite(SEG_A,LOW);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void five() {
  digitalWrite(SEG_A,HIGH);  
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,LOW);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,LOW);
}

void six() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,LOW);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void seven() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void eight() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,HIGH);
}

#include <Servo.h>

const int GATE1 = 6; // Entrance
const int GATE2 = 5;// Exit

Servo gate1;
Servo gate2;

void servomotorSetup() {
  pinMode(GATE1, OUTPUT);
  pinMode(GATE2, OUTPUT);
  gate1.attach(GATE1);
  gate2.attach(GATE2);
}
// Change servo's values according to what is needed
void servo_entrance_open() {
  gate1.write(175);
}

void servo_entrance_close() {
  gate1.write(72);
}

void servo_exit_open() {
  gate2.write(72);
}

void servo_exit_close() {
  gate2.write(175);
}

xfpd · March 9, 2024, 3:02pm

What is the source of these two libraries?

This sounds like the sensor reading happens very fast. Try adding a long delay after each sensor is read because a car takes time to move through the gate:

  TRA1 = digitalRead(tra1);
  delay(1000); // one second delay
  TRA2 = digitalRead(tra2);
  delay(1000); // one second delay

fxtalz · March 9, 2024, 3:15pm

They are two functions that include all of the servo code and the 7 segment code that displays 0-8

xfpd · March 9, 2024, 3:16pm

Was this from the IDE or a web site?

And.... obviously... you have no functions defined for the servo, sensors or any LED numbers.

fxtalz · March 9, 2024, 3:38pm

I wrote it myself on IDE

xfpd · March 9, 2024, 3:50pm

You should also post the libraries, because (as you know, since you wrote them) they have the function calls used in the sketch.

fxtalz · March 9, 2024, 3:53pm

I copied them for you in the original post

xfpd · March 9, 2024, 4:03pm

I want to change what I wrote... a better way to count the cars without a runaway number is to hold the sketch in place when a sensor (entrance or exit) detects a car, and waits until a car is not detected (the car has passed) before increasing the count of TRA1 or TRA2.

fxtalz · March 9, 2024, 4:47pm

how do i do that tho

xfpd · March 9, 2024, 5:02pm

After TRA1 becomes 1, put a second condition to test for TRA1 goes back to 0 to indicate the car has passed... maybe...

if (TRA1 == 1) { // Entrance, detector will sens a car and continue to be "1"
  servo_entrance_open(); // gate opens
  if (TRA1 == 0) { // car has passed detector, sensor is "0" now count one car
    {
      // the "count" code
    }
  } // close tra1 == 0
} // close tra1 == 1

fxtalz · March 9, 2024, 5:18pm

The count code isn't adding when supposed to. So its staying on 0.

#include "servomotors.h"
#include "7_segment.h"
const int tra1 = 2; // Entrance
const int tra2 = 7; // Exit
void setup() {
  servomotorSetup();
  segment_setup();
  Serial.begin(9600);
  pinMode(tra1, INPUT);
  pinMode(tra2, INPUT);
}
int TRA1, TRA2, count = 0;
void loop() {
  TRA1 = digitalRead(tra1);
  TRA2 = digitalRead(tra2);
  Serial.println(TRA1);
  Serial.println(TRA2);
  Serial.println(count);
  if (TRA1 == 1) { // Entrance
    servo_entrance_open();
    if (TRA1 == 0) {
      count = count + 1;
    } if (count == 0) {
      eight();
    } else if (count == 1) { // If 1 car display 7 (8-1)
      seven();
    } else if (count == 2) {
      six();
    } else if (count == 3) {
      five();
    } else if (count == 4) {
      four();
    } else if (count == 5) {
      three();
    } else if (count == 6) {
      two();
    } else if (count == 7) {
      one();
    } else if (count == 8) {
      zero();
    }
  } else if (TRA2 == 1) { // Exit
    // count = count - 1;
  }
  Serial.println(count);
}

const int SEG_A = 3;
const int SEG_B = 4;
const int SEG_C = 12;
const int SEG_D = 13;
const int SEG_E = 9;
const int SEG_F = 10;
const int SEG_G = 11;

void segment_setup() {
  pinMode(SEG_A, OUTPUT);
  pinMode(SEG_B, OUTPUT);
  pinMode(SEG_C, OUTPUT);
  pinMode(SEG_D, OUTPUT);
  pinMode(SEG_E, OUTPUT);
  pinMode(SEG_F, OUTPUT);
  pinMode(SEG_G, OUTPUT);
}
// SEG_A Top
// SEG_B Top Left
// SEG_C Middle
// SEG_D Top Right
// SEG E Bottom Right
// SEG F Bottom
// SEG G Bottom Left

void zero() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void one() {
  digitalWrite(SEG_A,LOW);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void two() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_E,LOW);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void three() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,LOW);
}

void four() {
  digitalWrite(SEG_A,LOW);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void five() {
  digitalWrite(SEG_A,HIGH);  
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,LOW);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,LOW);
}

void six() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,LOW);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void seven() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void eight() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,HIGH);
}

#include <Servo.h>

const int GATE1 = 6; // Entrance
const int GATE2 = 5;// Exit

Servo gate1;
Servo gate2;

void servomotorSetup() {
  pinMode(GATE1, OUTPUT);
  pinMode(GATE2, OUTPUT);
  gate1.attach(GATE1);
  gate2.attach(GATE2);
}
// Change servo's values according to what is needed
void servo_entrance_open() {
  gate1.write(175);
}

void servo_entrance_close() {
  gate1.write(72);
}

void servo_exit_open() {
  gate2.write(72);
}

void servo_exit_close() {
  gate2.write(175);
}

xfpd · March 9, 2024, 5:58pm

I see my mistake. I stopped letting the car count happen.

This will use your TRA1 == 1 check and add a "carEntered" flag. Then it will wait for TRA to be 0 (car has move away) to count the car.

#include "servomotors.h"
#include "7_segment.h"
const int tra1 = 2; // Entrance
const int tra2 = 7; // Exit

bool carEntered = 0; // <- ADDED for allowing car count

void setup() {
  servomotorSetup();
  segment_setup();
  Serial.begin(9600);
  pinMode(tra1, INPUT);
  pinMode(tra2, INPUT);
}
int TRA1, TRA2, count = 0;
void loop() {
  TRA1 = digitalRead(tra1);
  TRA2 = digitalRead(tra2);
  Serial.println(TRA1);
  Serial.println(TRA2);
  
  // if (TRA1 == 1) { // Entrance
  if (TRA1 == 1 && carEntered = 0) { // only allow if car is detected AND has not been counted
    carEntered = 1; // this will indicate a car has entered
  }

  if (TRA1 == 0 && carEntered == 1) { // this waits for the car to move AND "carEntered"
    servo_entrance_open();
    if (count == 0) {
      eight();
    } else if (count == 1) { // If 1 car display 7 (8-1)
      seven();
    } else if (count == 2) {
      six();
    } else if (count == 3) {
      five();
    } else if (count == 4) {
      four();
    } else if (count == 5) {
      three();
    } else if (count == 6) {
      two();
    } else if (count == 7) {
      one();
    } else if (count == 8) {
      zero();
    }

  } else if (TRA2 == 1) { // Exit
    count = count - 1;
  }
  Serial.println(count);
}

const int SEG_A = 3;
const int SEG_B = 4;
const int SEG_C = 12;
const int SEG_D = 13;
const int SEG_E = 9;
const int SEG_F = 10;
const int SEG_G = 11;

void segment_setup() {
  pinMode(SEG_A, OUTPUT);
  pinMode(SEG_B, OUTPUT);
  pinMode(SEG_C, OUTPUT);
  pinMode(SEG_D, OUTPUT);
  pinMode(SEG_E, OUTPUT);
  pinMode(SEG_F, OUTPUT);
  pinMode(SEG_G, OUTPUT);
}
// SEG_A Top
// SEG_B Top Left
// SEG_C Middle
// SEG_D Top Right
// SEG E Bottom Right
// SEG F Bottom
// SEG G Bottom Left

void zero() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void one() {
  digitalWrite(SEG_A,LOW);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void two() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_E,LOW);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void three() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,LOW);
}

void four() {
  digitalWrite(SEG_A,LOW);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void five() {
  digitalWrite(SEG_A,HIGH);  
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,LOW);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,LOW);
}

void six() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,LOW);
  digitalWrite(SEG_G,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
}

void seven() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,LOW);
  digitalWrite(SEG_C,LOW);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,LOW);
  digitalWrite(SEG_G,LOW);
}

void eight() {
  digitalWrite(SEG_A,HIGH);
  digitalWrite(SEG_B,HIGH);
  digitalWrite(SEG_C,HIGH);
  digitalWrite(SEG_D,HIGH);
  digitalWrite(SEG_E,HIGH);
  digitalWrite(SEG_F,HIGH);
  digitalWrite(SEG_G,HIGH);
}

#include <Servo.h>

const int GATE1 = 6; // Entrance
const int GATE2 = 5;// Exit

Servo gate1;
Servo gate2;

void servomotorSetup() {
  pinMode(GATE1, OUTPUT);
  pinMode(GATE2, OUTPUT);
  gate1.attach(GATE1);
  gate2.attach(GATE2);
}
// Change servo's values according to what is needed
void servo_entrance_open() {
  gate1.write(175);
}

void servo_entrance_close() {
  gate1.write(72);
}

void servo_exit_open() {
  gate2.write(72);
}

void servo_exit_close() {
  gate2.write(175);
}

fxtalz · March 10, 2024, 6:59am

Whats the :

bool carEntered = 0;

I never used this bool statement?

system · September 6, 2024, 7:00am

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.

Topic		Replies	Views
Car counting how to setup 3 cars max General Guidance	24	142	March 31, 2025
Trying to count the amount of passing objects Programming	10	1424	May 5, 2021
Alterando o código para usar dois servo motores aleatoriamente Português	18	6525	May 6, 2021
Parking lot using Arduino UNO. Need help in coding General Guidance	17	5814	May 5, 2021
Slot car lap counter General Guidance	41	379	May 11, 2025

Trouble with tracker sensor code

Related topics