#include <Stepper.h>

const int stepsPerRevolution = 200;  // Change this based on your stepper motor specifications
char prevInputB= 1; 
char prevInputA = 'a'; 
Stepper columnStepper(stepsPerRevolution, 8, 9, 10, 11);
Stepper rowStepper(stepsPerRevolution, 4, 5, 6, 7);

// Function to move the stepper motors based on chess coordinates with a constant speed
void moveToPosition(char column, int row) {
  // Set the speed for column stepper motor
  columnStepper.setSpeed(200);

  // Convert column character to a corresponding number (A=1, B=2, ..., H=8)
 

  // Move the column stepper motor
  int columnSteps = (column ) * stepsPerRevolution;
  columnStepper.step(columnSteps*10);

  // Set the speed for row stepper motor
  rowStepper.setSpeed(200);

  // Move the row stepper motor
  int rowSteps = (row ) * stepsPerRevolution;
  rowStepper.step(rowSteps*10);
}

void setup() {
  Serial.begin(9600);  // Initialize serial communication at 9600 bps
}

void loop() {


  char column;
    int row;
  Serial.println("Enter chess move (e.g., E5):");
  // Check if there's serial data available
    while (Serial.available() < 2) {
    // Wait for user input
  }
  if (Serial.available() > 0) {
    // Read the input string until a newline character is received
    String input = Serial.readStringUntil('\n');

    // Parse the input string (assuming format like "A5")
  
    sscanf(input.c_str(), "%c%d", &column, &row);
       column = tolower(column);

    // Move to the specified position
      Serial.print("Received Move: ");
  Serial.print(column);
  Serial.println(row);
  }

  


 int rotationsA = column - prevInputA; // Calculate the difference
  int rotationsB= row - prevInputB; 
  int forprintB= prevInputB;

  Serial.print("Previous COLUMN Position: ");
  Serial.println(prevInputA);
  Serial.print("Column Rotations: ");
  Serial.println(rotationsA);
    Serial.print("Previous ROW Position: ");
  Serial.println(forprintB);
  Serial.print(" Row Rotations: ");
  Serial.println(rotationsB);

  moveToPosition(rotationsA, rotationsB);

 

  prevInputB = row;
  prevInputA = column;

  
}