#include "SoftwareSerial.h"

// Declare and initialize UART pins
const int rx_pin = 4;
const int tx_pin = 5;

// Declare and initialize hall sensor pin
const int hall_pin = 8;

// Define pin numbers for motor driver
const int dirPin = 1; // direction
const int stepPin = 2; // step
const int enaPin = 3; // enable

// set number of steps that the motor should rotate
const int steps = 16*200*2; 

int sum = 0;

// Create new serial with specified UART pins
SoftwareSerial mySerial(rx_pin , tx_pin);

void setup() {
  // Set the pin modes of UART pins
  pinMode(rx_pin, INPUT); // Receiving requires input
  pinMode(tx_pin, OUTPUT); // Transmitting requires output

  // Set sensor as input
  pinMode(hall_pin, INPUT);

  // Start the serial communication at 9600 bits/sec
  mySerial.begin(9600);
  
  // Define all pins for motor driver as output
  pinMode(stepPin,OUTPUT);
  pinMode(dirPin,OUTPUT);
  pinMode(enaPin,OUTPUT);

// Enable the motor driver
  digitalWrite(enaPin,LOW);
  digitalWrite(dirPin,HIGH); // Set the rotation to one particular direction
}

void loop() {
  // Perform a certain number of steps
  for(int x = 0; x < steps; x++) {
    // Generate a pulse
    digitalWrite(stepPin,HIGH);
    delayMicroseconds(700);
    digitalWrite(stepPin,LOW);
    delayMicroseconds(700);
    
    // Read the analog value of the pin and send it via serial communication
    int val = analogRead(hall_pin);
    // Average the readings over ten points
    if (x%10 == 0){
      mySerial.println(sum/10);
      sum = 0;
    }
    else {
      sum = sum + val;
    }
  }
}