Arduino модуль энкодера KY-040

Rotary encoder can be counted by rotating forward and reverse direction during rotation of the output pulse frequency,
Unlike counter rotating potentiometer, this rotation counts are not limited.
With the buttons on the rotary encoder can be reset to its initial state, that starts counting from 0.

******************
ARDUI-NO test code:
const int interruptA = 0; / / Interrupt 0 (pin 2)
const int interruptB = 1; / / Interrupt 1 (pin 3)
int CLK = 2; / / PIN2
int DAT = 3; / / PIN3
int BUTTON = 4; / / PIN4
int LED1 = 5; / / PIN5
int LED2 = 6; / / PIN6
int COUNT = 0;
void setup ()
  {
   attachInterrupt (interruptA, RoteStateChanged, FALLING);
  / / AttachInterrupt (interruptB, buttonState, FALLING);
   pinMode (CLK, INPUT);
   digitalWrite (2, HIGH); / / Pull High Restance
   pinMode (DAT, INPUT);
   digitalWrite (3, HIGH); / / Pull High Restance
   pinMode (BUTTON, INPUT);
   digitalWrite (4, HIGH); / / Pull High Restance
   pinMode (LED1, OUTPUT);
   pinMode (LED2, OUTPUT);
    Serial.begin (9600);
  }
void loop ()
{
   if (! (digitalRead (BUTTON)))
     {
      COUNT = 0;
      Serial.println ("STOP COUNT = 0");
      digitalWrite (LED1, LOW);
      digitalWrite (LED2, LOW);
      delay (2000);
     }
      Serial.println (COUNT);
}
/ / -------------------------------------------
void RoteStateChanged () / / When CLK FALLING READ DAT
{
  if (digitalRead (DAT)) / / When DAT = HIGH IS FORWARD
    {
     COUNT;
     digitalWrite (LED1, HIGH);
     digitalWrite (LED2, LOW);
     delay (20);
    }
  else / / When DAT = LOW IS BackRote
    {
     COUNT -;
     digitalWrite (LED2, HIGH);
     digitalWrite (LED1, LOW);
     delay (20);
    }
}