Changing star tracker code for esp32

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,
I am using this code to run 28byj48 to run my star tracker using arduino nano. Now I want to switch the board to esp32 and control the stepper speed via wifi. Can you please help me to change the code which will be compatible with esp32 web interface?
I am totally new with esp32
TIA :pray:

Existing code:

#include <Stepper.h>

//ULN2003
const int speedPBInc  =2;//define input pin 
const int stopPB=3;//define input pin for Stop push button
const int speedPBDec =4;//define input pin 
const int motorPin[] ={8, 10, 9, 11};
const int direction =0;//0 for CW, 1 for CCW;
const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
int speedStep = 1;
int stepMinimum = 40;
int stepMaximum = 178;
int stopType =0;//0=fully stopped , 1=hold (consumes energy) 

int currentSpeed=115;
int currentSPR=stepsPerRevolution;

#define START 1 //
#define STOP 0
#define CW 1
#define CCW -1
#define MotorInterfaceType 8
int motorStopState=START;//change if you need to
// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, motorPin[0], motorPin[1], motorPin[2], motorPin[3]);

void setup() {
  
  myStepper.setSpeed(115);
  // initialize the serial port:
  Serial.begin(9600);
  pinMode(speedPBInc, INPUT_PULLUP);
  pinMode(stopPB,INPUT_PULLUP);
  pinMode(speedPBDec,INPUT_PULLUP); 
  //attachInterrupt(digitalPinToInterrupt(stopPB), stopMotor, FALLING);  
}

void loop() {
  
  updateState();

if(!motorStopState)
{
  currentSPR =0;
}else{
  currentSPR =stepsPerRevolution;  
}
  
  myStepper.setSpeed(currentSpeed);
  if(direction ==1)
  {
    myStepper.step(-currentSPR);
  }else{
    myStepper.step(currentSPR);    
  }
 

}//loop

void updateState()
{

  if(digitalRead(stopPB) ==LOW)
  {
   motorStopState =1-motorStopState;// stop the motor
    if(motorStopState  ==STOP)
    {
      stopMotor();
    }
   delay(500);
 
  }

  if(digitalRead(speedPBInc) ==LOW)
  {
  motorStopState = START;
  currentSpeed += speedStep;
   if( currentSpeed >=stepMaximum )  currentSpeed =stepMaximum ;
  }

  if(digitalRead(speedPBDec) ==LOW)
  {
  motorStopState = START;    
   currentSpeed -= speedStep;
   if( currentSpeed <stepMinimum )  currentSpeed =stepMinimum ;
  }  

}//updateState end

void stopMotor()
{
  if(stopType ==0)
  {
    for(int i=0; i<4; i++)
    {
      digitalWrite(motorPin[i], LOW);
    }
  }
  
}//stopMotor() end
2

What is the problem?
What comes out when setting up the IDE for that controller and compiling?

3

Here your project with UNO:

and here is your project with the ESP32 (See that I changed the step and button pins).

UNO

#include <Stepper.h>

//ULN2003
const int speedPBInc  = 2; //define input pin
const int stopPB = 3; //define input pin for Stop push button
const int speedPBDec = 4; //define input pin
const int motorPin[] = {8, 10, 9, 11};
const int direction = 0; //0 for CW, 1 for CCW;
const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
int speedStep = 1;
int stepMinimum = 40;
int stepMaximum = 178;
int stopType = 0; //0=fully stopped , 1=hold (consumes energy)
int currentSpeed = 115;
int currentSPR = stepsPerRevolution;
#define START 1 //
#define STOP 0
#define CW 1
#define CCW -1
#define MotorInterfaceType 8
int motorStopState = START; //change if you need to
// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, motorPin[0], motorPin[1], motorPin[2], motorPin[3]);
//----------------------------------------------------------------------
void setup() {
  myStepper.setSpeed(115);
  // initialize the serial port:
  Serial.begin(9600);
  pinMode(speedPBInc, INPUT_PULLUP);
  pinMode(stopPB, INPUT_PULLUP);
  pinMode(speedPBDec, INPUT_PULLUP);
  //attachInterrupt(digitalPinToInterrupt(stopPB), stopMotor, FALLING);
}
//----------------------------------------------------------------------
void loop() {
  updateState();
  if (!motorStopState) {
    currentSPR = 0;
  }
  else {
    currentSPR = stepsPerRevolution;
  }
  myStepper.setSpeed(currentSpeed);
  if (direction == 1)  {
    myStepper.step(-currentSPR);
  }
  else {
    myStepper.step(currentSPR);
  }
}
//----------------------------------------------------------------------
void updateState() {
  if (digitalRead(stopPB) == LOW)  {
    motorStopState = 1 - motorStopState; // stop the motor
    if (motorStopState  == STOP)    {
      stopMotor();
    }
    delay(500);
  }
  if (digitalRead(speedPBInc) == LOW)  {
    motorStopState = START;
    currentSpeed += speedStep;
    Serial.println(currentSpeed);
    if ( currentSpeed >= stepMaximum )
      currentSpeed = stepMaximum ;
  }
  if (digitalRead(speedPBDec) == LOW)  {
    motorStopState = START;
    currentSpeed -= speedStep;
    Serial.println(currentSpeed);
    if ( currentSpeed < stepMinimum )  currentSpeed = stepMinimum ;
  }
}
//----------------------------------------------------------------------
void stopMotor(){
  if (stopType == 0)  {
    for (int i = 0; i < 4; i++)    {
      digitalWrite(motorPin[i], LOW);
    }
  }
}

ESP32:

#include <Stepper.h>

//ULN2003
const int speedPBInc  = 18; //define input pin
const int stopPB = 5; //define input pin for Stop push button
const int speedPBDec = 4; //define input pin
const int motorPin[] = {19, 21, 22, 23};
const int direction = 0; //0 for CW, 1 for CCW;
const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
int speedStep = 1;
int stepMinimum = 40;
int stepMaximum = 178;
int stopType = 0; //0=fully stopped , 1=hold (consumes energy)
int currentSpeed = 115;
int currentSPR = stepsPerRevolution;
#define START 1 //
#define STOP 0
#define CW 1
#define CCW -1
#define MotorInterfaceType 8
int motorStopState = START; //change if you need to
// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, motorPin[0], motorPin[1], motorPin[2], motorPin[3]);
//----------------------------------------------------------------------
void setup() {
  myStepper.setSpeed(115);
  // initialize the serial port:
  Serial.begin(9600);
  pinMode(speedPBInc, INPUT_PULLUP);
  pinMode(stopPB, INPUT_PULLUP);
  pinMode(speedPBDec, INPUT_PULLUP);
  //attachInterrupt(digitalPinToInterrupt(stopPB), stopMotor, FALLING);
}
//----------------------------------------------------------------------
void loop() {
  updateState();
  if (!motorStopState) {
    currentSPR = 0;
  }
  else {
    currentSPR = stepsPerRevolution;
  }
  myStepper.setSpeed(currentSpeed);
  if (direction == 1)  {
    myStepper.step(-currentSPR);
  }
  else {
    myStepper.step(currentSPR);
  }
}
//----------------------------------------------------------------------
void updateState() {
  if (digitalRead(stopPB) == LOW)  {
    motorStopState = 1 - motorStopState; // stop the motor
    if (motorStopState  == STOP)    {
      stopMotor();
    }
    delay(500);
  }
  if (digitalRead(speedPBInc) == LOW)  {
    motorStopState = START;
    currentSpeed += speedStep;
    Serial.println(currentSpeed);
    if ( currentSpeed >= stepMaximum )
      currentSpeed = stepMaximum ;
  }
  if (digitalRead(speedPBDec) == LOW)  {
    motorStopState = START;
    currentSpeed -= speedStep;
    Serial.println(currentSpeed);
    if ( currentSpeed < stepMinimum )  currentSpeed = stepMinimum ;
  }
}
//----------------------------------------------------------------------
void stopMotor(){
  if (stopType == 0)  {
    for (int i = 0; i < 4; i++)    {
      digitalWrite(motorPin[i], LOW);
    }
  }
}
4

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