Arduino dc motor & inductive proximity sensor

Other Hardware Sensors
1

Hello, I'm new to this forum. I need help.
I have a 12v 10rpm DC geared motor, 2 inductive proximity sensors, push button and l298n drivers.
I want the Arduino code to work as follows using millis, 2D array.

when the button is pressed the code should start.
when the motor direction is forward and sensor 2 is triggered motor should stop and when the direction is revere and sensor 1 is triggered then the motor should stop.

I've a working code:
the problem is when the sensor2 is triggered then it stops but in reverse direction, it is not running. please help me with this.

double dc_mot[][5] =  { {1, 0, 5, 255, 1}, {1, 6, 10, 255, -1},{1, 10, 15, 255, 1}, {1, 15, 20, 255, -1} };

int animLen = sizeof(dc_mot)/sizeof(dc_mot[0]);
unsigned long previousMillis = 0;
const long interval = 100;

const int buttonPin = 12;      
int buttonState;            
int lastButtonState = LOW;
unsigned long lastDebounceTime = 0;  
unsigned long debounceDelay = 50;
int showStarted = LOW;
unsigned long showStartTime = 0;

int in1 = 4;
int in2 = 3;
int enA = 5; 

int sensor1 = 9;
int sensor2 = 8;

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  pinMode(enA, OUTPUT);
  
  digitalWrite(in1, LOW);
  digitalWrite(in2, LOW);  
  pinMode(sensor1, INPUT_PULLUP);
  pinMode(sensor2, INPUT_PULLUP);
  
  motors(255, -1);
  delay(10);
  Serial.begin(9600);
  Serial.println("begin");
}


void loop() {
  int reading = digitalRead(buttonPin);
  if (reading != lastButtonState) {
    lastDebounceTime = millis();

  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading != buttonState) {
      buttonState = reading;

      if ((buttonState == LOW) && (showStarted == LOW)) {
        showStarted = HIGH;
        showStartTime = millis();
      }
    }
  }

  if (showStarted){
    unsigned long currentMillis = millis() - showStartTime;
    unsigned long temp = currentMillis/100;
    double currentMillisInt = temp/10.0f;
    
    for (int i = 0; i < animLen; i++){
      if (dc_mot[i][1] == currentMillisInt)
        motors(dc_mot[i][3], dc_mot[i][4]);
      else if (dc_mot[i][2] == currentMillisInt)       
        motors(dc_mot[i][3], 0);
    }
    if (currentMillis - previousMillis >= interval){
      previousMillis = currentMillis;
      for (int i = 0; i < animLen; i++){
        if (dc_mot[i][1] == currentMillisInt)
          motors(dc_mot[i][3], dc_mot[i][4]);
        else if (dc_mot[i][2] == currentMillisInt)
          motors(dc_mot[i][3], 0); 
      }
    }
  }

  lastButtonState = reading;

Serial.print("sens 1 = ");Serial.print(digitalRead(sensor1)); Serial.print(", sens 2 = ");Serial.println(digitalRead(sensor2));
if (digitalRead(sensor1) == LOW && dc_mot[animLen-1][4] == 1) {
    motors(255, 0); 
  }
   if (digitalRead(sensor2) == LOW && dc_mot[animLen-1][4] == -1) {
    motors(255, 0);  
  } 


}


void motors(int speed, int dir){

    if (dir == 1){
      analogWrite(enA, speed);
      digitalWrite(in1, HIGH);
      digitalWrite(in2, LOW);
      
    }else if (dir == -1){
      analogWrite(enA, speed);
      digitalWrite(in1, LOW);
      digitalWrite(in2, HIGH);
      
    } else if (dir == 0) {
      analogWrite(enA, speed);
      digitalWrite(in1, LOW);
      digitalWrite(in2, LOW);
      }
   
}

please help me with this. thank you.

2

more details pls. schematic, name of driver

3

driver- https://www.amazon.com/Qunqi-Controller-Module-Stepper-Arduino/dp/B014KMHSW6

proximity sensor - https://www.amazon.com/Twidec-Inductive-Proximity-Detecting-LJ12A3-4-Z/dp/B07NYD3CPK?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=AGOSLUO29ZUJ2

4

what is this array?

6

{1, 0, 5, 255, 1} = {motor no., Motor start time, motor stop time, speed, direction}
@motor starttime motor will run in forward direction 1, and stops at motor stop time.
-1 for reverse direction.

7 
int dc_mot[][4] =  { {1,  5, 255, 1}, {1,  10, 255, -1}, {1, 15, 255, 1}, {1,  20, 255, -1} };

const int buttonPin = 12;

const int in1 = 4;
const int in2 = 3;
const int enA = 5;

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  pinMode(enA, OUTPUT);

  digitalWrite(in1, LOW);
  digitalWrite(in2, LOW);

  while (digitalRead(buttonPin));
}


void loop() {
  for (int i = 0; i < 4; i++) {
    motors(dc_mot[i][2], dc_mot[i][3]);
    while ( int(millis() % 20) <= dc_mot[i][1]);
  }
}


void motors(int speed, int dir) {

  if (dir == 1) {
    analogWrite(enA, speed);
    digitalWrite(in1, HIGH);
    digitalWrite(in2, LOW);

  } else if (dir == -1) {
    analogWrite(enA, speed);
    digitalWrite(in1, LOW);
    digitalWrite(in2, HIGH);

  } else if (dir == 0) {
    digitalWrite(in1, LOW);
    digitalWrite(in2, LOW);
  }

}
8

thats not what i what... you dint even use the sensors... anyway thanks for the help

9

is motor running? yes.
Are the time intervals maintained? yes
is millis() used? yes
is it work on wanted 2D array? yes

if motor direction is 1, we can awaiting until endstop2 will be hit to stopp the motor - no millis(), no array is needed at all, no reverse direction possible, stopp has no directions.
same in reverse.

10

you have not understood my problem.
what I'm doing is there is a dc motor and two proximity sensors.
the dc motor is connected to wood stick which has a magnet at the other end of the stick & when the motor rotates right side the magnet passes through proximity sensor 1 and stops, same when motor turns left the other sensor detects magent and stops the motor.

so for example I want to run the motor from 2 second to 10 sec and stops for 5 seconds then start at 15 sec & stop at 25 sec. like wise there are multiple timings & direction start time stop time is controlled via array .

so the problem is when it detect the sensor motor should stop in both directions.

11

you have not understand the word "stop"

what does push button in this setup?
draw an algorithm

12

push button gives the command to start the array.

13

thank you for your reply. i've figured it out.

14

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