#include <IRremote.h> // Include IRremote library
#include <Stepper.h>

const int stepsPerRevolution = 200;
int Receiver = 7; // Define the pin for IR receiver

IRrecv irrecv(Receiver); // Create IR receiver object
decode_results results;

Stepper stepper(stepsPerRevolution, 8, 9, 10, 11); // Create stepper motor object
int previous = 0;
int stepperSteps = 0;

void setup() {
  stepper.setSpeed(200); // Set the speed at 200 rpm
  Serial.begin(9600); // Initialize serial communication
  irrecv.enableIRIn(); // Start receiving IR signals
}

void loop() {
  if (irrecv.decode()) {
    IRremote(); // Handle IR remote commands
    irrecv.resume(); // Receive the next value
    stepper.step(stepperSteps - previous); // Move stepper motor by the specified number of steps
    previous = stepperSteps; // Update previous steps
  }
}

void IRremote() {
  int IRinput = irrecv.decodedIRData.command; // Get IR remote command

  if (IRinput == 152) { // If '-' button is pressed
    stepperSteps -= 1; // Decrease stepper steps
    if (stepperSteps < 0) {
      stepperSteps = 0; // Ensure stepper steps don't go below 0
    }
  }
  if (IRinput == 2) { // If '+' button is pressed
    stepperSteps += 1; // Increase stepper steps
    if (stepperSteps > 200) {
      stepperSteps = 200; // Ensure stepper steps don't exceed 200
    }
  }
}