//rotary encoder inputs
#define inputCLK 3
#define inputDT 2
#define inputSW 1

//led inputs
#define led1 7
#define led2 8
#define led3 9
#define led4 10
#define led5 11
#define led6 12

int counter = 0;
int currentStateCLK;
int previousStateCLK;
int lastCLKvalue;

String encDirection = "";

void setup() {
  // encoder pins as inputs
 pinMode(inputCLK, INPUT);
 pinMode(inputDT, INPUT);
 pinMode(inputSW, INPUT);

  // led pins as outputs
 pinMode(led1, OUTPUT);
 pinMode(led2, OUTPUT);
 pinMode(led3, OUTPUT);
 pinMode(led4, OUTPUT);
 pinMode(led5, OUTPUT);
 pinMode(led6, OUTPUT);


 Serial.begin(9600);
 previousStateCLK = digitalRead(inputCLK);

}

void loop() {
 
 currentStateCLK = digitalRead(inputCLK);
 // if the previous and the current state are different then a pulse has occured
 if (currentStateCLK != previousStateCLK) {
  if(digitalRead(inputDT) != currentStateCLK){
    counter --;
    encDirection = "CCW"; //CCW = antiorario
    digitalWrite(led1, LOW);
    digitalWrite(led2, HIGH);
    
      } 
   else {
    counter ++;
    encDirection = "CW"; // CW = orario
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    
   }
 Serial.print(" Direction: ");
 Serial.print(encDirection);
 Serial.print(" -- Value: ");
 Serial.print(counter);

 }

 previousStateCLK = currentStateCLK;

}

void readRotaryEncoder(void) {
 int CLKvalue = digitalRead(inputCLK);
 Serial.println(CLKvalue);
}