const int LED_PIN = 8;
const int RELAY_PIN = 9;
const int interruptPin = 3;
const int CLK_PIN = 2;
const int DT_PIN = 3;
int pressStatus = 0;

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  attachInterrupt(digitalPinToInterrupt(interruptPin), blinkOK, CHANGE);
  attachInterrupt(digitalPinToInterrupt(CLK_PIN), timeADJ, FALLING);
}

// the loop function runs over and over again forever
void loop() {
  //digitalWrite(LED_PIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  //delay(1000);                      // wait for a second
  //digitalWrite(LED_PIN, LOW);   // turn the LED off by making the voltage LOW
  //delay(1000);                      // wait for a second
}

void blinkOK() 
{
  static unsigned long last_interrupt_time = 0;
  unsigned long interrupt_time = millis();
  if (interrupt_time - last_interrupt_time > 200)
  {
  //-----------------------------------------------------
  if (pressStatus == 0)
    {  
      pressStatus = 1;
      digitalWrite(LED_PIN, HIGH);
      digitalWrite(RELAY_PIN, HIGH);
    }
  else
    { 
      pressStatus = 0;
      digitalWrite(LED_PIN, LOW);
      digitalWrite(RELAY_PIN, LOW);
    }
  //-----------------------------------------------------
  }
  last_interrupt_time = interrupt_time;
}


int lastClk = HIGH;

void timeADJ()
{
  int newClk = digitalRead(CLK_PIN);
  if (newClk != lastClk) {
    // There was a change on the CLK pin
    lastClk = newClk;
    int dtValue = digitalRead(DT_PIN);
    if (newClk == LOW && dtValue == HIGH) {
      Serial.println("Rotated clockwise ⏩");
      digitalWrite(LED_PIN, HIGH);
    }
    if (newClk == LOW && dtValue == LOW) {
      Serial.println("Rotated counterclockwise ⏪");
      digitalWrite(LED_PIN, LOW);
    }
  }
}