Start and stop a loop with pressure button - ezButton library

[inescruz4]

Hello, I'm new to Arduino programming and I needed your help. I'm working on a project where I have a servomotor making an infinite pulsating cycle. But I would like to control, through a push button, when the servomotor starts and when it stops. For example, when I click the button once it starts the loop, when I double click it stops. I already have this code done, but it only assumes clicking on the button to start the loop, I can't stop it.

#include <Servo.h>
#include <ezButton.h>

Servo servo1; // Create a servo object to control a servo
#define LOOP_STATE_STOPPED 0
#define LOOP_STATE_STARTED 1

// Variable to store the servo position
int pos = 0;
int ciclos=0;
int loopState = LOOP_STATE_STOPPED;

ezButton button(2);

void setup()
{
// Attaches the servo on pin 6 to the servo object
servo1.attach(6);
Serial.begin(9600);
}

void loop() {

  button.loop();
  
  if(button.isPressed())
    if (loopState == LOOP_STATE_STOPPED) loopState = LOOP_STATE_STARTED;
    else loopState = LOOP_STATE_STOPPED;
  
  if (loopState == LOOP_STATE_STARTED) {
    for(pos = 0; pos < 180; pos += 1) // Goes from 0 degrees to 180 degrees in steps of 1 degree
    {
      servo1.write(pos); // Tell servo to go to position in variable 'pos'
      delay(20); // Waits 20ms for the servo reach the position
    }

    delay(2000);
    for(pos = 179; pos > 1; pos = pos-1) // Goes from 179 degrees to 1 degree in steps of 1 degree
    {
    servo1.write(pos); // Tell servo to go to position in variable 'pos'
    delay(20); // Waits 200ms for the servo reach the position

    }
    delay(2000);
    ciclos++;
    Serial.println(ciclos); 
  
}
}

[gcjr]

@inescruz4

when I click the button once it starts the loop, when I double click it stops. I already have this code done, but it only assumes clicking on the button to start the loop, I can't stop it.

how about simply pressing the button starts/stops

but i believe your real concern is being able to stop the servo at any time. you code runs several loops during which the button is not checked

consider

#undef MyHW
#ifdef MyHW
# include "simLib.hh"
ezButton button (A1);

#else
# include <Servo.h>
# include <ezButton.h>
ezButton button (2);
#endif

Servo    servo1;

int dir  = 1;
int pos  = 0;
int targ = 180;

int run;

unsigned long msecPeriod;
unsigned long msecLst;

char s [80];

// -----------------------------------------------------------------------------
void loop ()
{
    unsigned long msec = millis ();
    if (run && msec - msecLst >= msecPeriod)  {
        msecLst = msec;

        if (pos == targ)  {
            targ       = 180 == targ ? 0 : 180;
            msecPeriod = 2000;
            
        }
        else  {
            pos        += (targ - pos) > 0 ? 1 : -1;
            msecPeriod  = 20;

            sprintf (s, " targ %3d, pos %3d", targ, pos);
            Serial.println (s);
        }
    }

    button.loop ();
    if (button.isPressed())
        run = ! run;
}

// -----------------------------------------------------------------------------
void setup ()
{
    Serial.begin (9600);
    servo1.attach (6);
}