#include <Stepper.h>
#define echoPin 2
#define trigPin 3
const int stepsPerRevolution = 200;
Stepper s(stepsPerRevolution, 8, 9, 10, 11);
long duration;
int distance;
void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
s.setSpeed(60);
}
void loop() {
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
duration = pulseIn(echoPin, HIGH);
distance = duration * 0.034 / 2;
if (distance > 10)
{
s.step(stepsPerRevolution);
}
}