#include <IRremote.h>
#include <Stepper.h>

const int stepsPerRevolution = 200;
#define IR_PIN 2
#define STEPPER_PIN1 10
#define STEPPER_PIN2 11
#define STEPPER_PIN3 12
#define STEPPER_PIN4 13

IRrecv irrecv(IR_PIN);
decode_results results;

Stepper stepper(stepsPerRevolution, STEPPER_PIN1, STEPPER_PIN2, STEPPER_PIN3, STEPPER_PIN4);
int previous = 0;
int stepperSteps = 0;

void setup() {
  stepper.setSpeed(200);
  irrecv.enableIRIn();
}

void loop() {
  if (irrecv.decode()) {
    switch (irrecv.decodedIRData.command) {
      case 2: // Tombol +
        stepperSteps += 1;
        if (stepperSteps > stepsPerRevolution) {
          stepperSteps = stepsPerRevolution;
        }
        break;
      case 152: // Tombol -
        stepperSteps -= 1;
        if (stepperSteps < 0) {
          stepperSteps = 0;
        }
        break;
    }
    irrecv.resume();
    stepper.step(stepperSteps - previous);
    previous = stepperSteps;
  }
}