#define pinCLK 1       // CLK pin connected to GPIO 1
#define pinDT  2       // DT pin connected to GPIO 2
#define pinSW  3       // SW pin connected to GPIO 3

int count = 0;    // Var to know how many clicks occured (increment clockwise and decrement counter_clockwise)
int previousStateSW;           // Var to memorize previous SW state to compare it with actual state
int previousStateCLK;          // Var to memorize previous CL state to compare it with actual state

void setup() {

    Serial.begin(9600);

    pinMode(pinSW, INPUT_PULLUP);         // INPUT_PULLUP to avoid 'floating'
    pinMode(pinDT, INPUT);
    pinMode(pinCLK, INPUT);

    previousStateSW  = digitalRead(pinSW);    // initial value for SW
    previousStateCLK = digitalRead(pinCLK);   // initial value for CLK

    delay(200); // delay to stabilize signal before the loop
}

void loop() {

    int actualStateCLK = digitalRead(pinCLK); // reading CLK value
    int actualStateDT  = digitalRead(pinDT);  // reading DT value
    int actualStateSW  = digitalRead(pinSW);  // reading SW value

// *************************
// Push Button verification
// *************************

    if(actualStateSW != previousStateSW) {    // Checking if SW state has changed
        previousStateSW = actualStateSW;      // Save new state

        if(actualStateSW == LOW)
            Serial.println(F("SW Button pushed"));     // Display State on serial monitor
        else
            Serial.println(F("SW Button released"));

        delay(10); // Delay to avoid rebounce
    }

// ***************************
// Rotary encoder verification
// ***************************

    if (actualStateCLK != previousStateCLK) {
        delayMicroseconds(200); // Debounce delay
        if (digitalRead(pinCLK) == actualStateCLK) { // Check if the CLK signal has settled
            previousStateCLK = actualStateCLK;

    if(actualStateCLK == LOW) {

        if(actualStateCLK != actualStateDT) {   // comparing CLK and DT, if they're different, direction is counter-clockwise          
            count++;                            // decrement counter
            Serial.println(F("clockwise"));   // Display value on Serial Monitor
//            Serial.println(count);
        }
     else {                                   // when CLK and DT are similar, direction is clockwise            
        count--;                             // increment counter
        Serial.println(F("counter-clockwise"));   // Display value on Serial Monitor
//        Serial.println(count);
}
      
    }
    } 

}
}