Goal is to create an arduino program that turns on a stepper motor with a sound sensor and it rotate continuously until a magnet sensor is activated and it shuts off. Then once the sound sensor is activated again it goes into the reverse direction until it approaches the other magnet.

The problem I am having is that my stepper motor is vibrating and not rotating. What have I done wrong? How can I fix it$?$

I believe the error might be in my moveFoward$/$backward functions.

My code:

#include

const int soundPin $=2$; $//$ Analog pin for microphone sensor

const int magnetPin$1=3$; $//$ Digital pin for initial position magnet

const int magnetPin$2=4$; $//$ Digital pin for stopping position magnet

const int stepsPerRevolution $=2048$; $//$ Steps per revolution for $28$BYJ$-48$ stepper motor

Stepper myStepper$($stepsPerRevolution$,8,9,10,11)$; $//$ Define stepper motor pins

int speed $=8$; $//$ Stepper motor speed

unsigned long lastStepTime $=0$; $//$ Time of last step

unsigned long debounceDelay $=50$; $//$ Debounce delay in milliseconds

void setup$()\{$

pinMode$($soundPin$,$ INPUT$)$;

pinMode$($magnetPin$1,$ INPUT$\_$PULLUP$)$;

pinMode$($magnetPin$2,$ INPUT$\_$PULLUP$)$;

myStepper.setSpeed$($speed$)$;

Serial.begin$(9600)$;

$\}$

void loop$()\{$

int soundVal $=$ analogRead$($soundPin$)$; $//$ Read microphone sensor value

Serial.println$($soundVal$)$;

$//$ Check for sound and magnet sensor states

if $($soundVal $>500$ && digitalRead$($magnetPin$2)==$ LOW$)\{//$ Sound detected, and at stopping position

moveForward$()$;

$\}$ else if $($soundVal $>500$ && digitalRead$($magnetPin$1)==$ LOW$)\{//$ Sound detected, and at initial position

moveBackward$()$;

$\}$

$\}$

void moveForward$()\{$

while $($digitalRead$($magnetPin$2)==$ LOW$)\{//$ Keep moving until stopping position is reached

if $($millis$()-$ lastStepTime $>=$ debounceDelay$)\{$

myStepper.step$(1)$;

lastStepTime $=$ millis$()$;

$\}$

$\}$

$\}$

void moveBackward$()\{$

while $($digitalRead$($magnetPin$1)==$ LOW$)\{//$ Keep moving until initial position is reached

if $($millis$()-$ lastStepTime $>=$ debounceDelay$)\{$

myStepper.step$(-1)$;

lastStepTime $=$ millis$()$;

$\}$

$\}$

$\}$