#define inputCLK 4

#define inputDT 5

// LED Outputs

#define ledCW 8

#define ledCCW 9

 int counter = 0;

int currentStateCLK;

int previousStateCLK;

 String encdir ="";

 

void setup() {

   pinMode (inputCLK,INPUT);

   pinMode (inputDT,INPUT);

   pinMode (ledCW,OUTPUT);

   pinMode (ledCCW,OUTPUT);

   Serial.begin (9600);

   previousStateCLK = digitalRead(inputCLK);

 }

 

void loop() {

   currentStateCLK = digitalRead(inputCLK);

   if (currentStateCLK != previousStateCLK){

     if (digitalRead(inputDT) != currentStateCLK) {

       counter --;

       encdir ="CCW";

       digitalWrite(ledCW, LOW);

       digitalWrite(ledCCW, HIGH);

       } else {

       counter ++;

       encdir ="CW";

       digitalWrite(ledCW, HIGH);

       digitalWrite(ledCCW, LOW);

       }

     Serial.print("Direction: ");

     Serial.print(encdir);

     Serial.print(" -- Value: ");

     Serial.println(counter);

   }

   previousStateCLK = currentStateCLK;

}