#include <SoftwareSerial.h>

SoftwareSerial mySerial(1,2);

int stepCounter;
bool stepDirection = HIGH;
char val = "";
 
void setup()
{
    mySerial.begin(9600);
 
    // Turn on LED when program starts
    pinMode(1, OUTPUT);
    digitalWrite(1, HIGH);

    pinMode(4, OUTPUT); // Step
    pinMode(3, OUTPUT); // Richtung
}
 
void loop()
{
  stepCounter = 0;
    if(mySerial.available()){
      val = mySerial.read();
    }
    if(val == "C"){
      digitalWrite(3, HIGH);
    }else if(val == "AC"){
      digitalWrite(3, LOW);
    }else {
      //stepCounter = toInt(val);
      for(int i=0; i<val; i++){
        digitalWrite(4, HIGH);
        delay(5);
        digitalWrite(4, LOW);
        delay(5);
      }
    }
    
    
}