const int encoderPinA = 2; 
const int encoderPinB = 3; 
float Angle=0.0;
int encoderPos = 0.0; 

void encoderA() 
{
int stateA = digitalRead(encoderPinA);
int stateB = digitalRead(encoderPinB);
  if (stateA != stateB) 
  {
    encoderPos++;
  } 
  else 
  {
    encoderPos--;
  }
}
void encoderB() 
{ 
int stateA = digitalRead(encoderPinA);
int stateB = digitalRead(encoderPinB);
  if (stateA == stateB) 
  {
    encoderPos++;
  } 
  else 
  {
    encoderPos--;
  }
}
void setup() 
{
  Serial.begin(115200);
  pinMode(encoderPinA, INPUT); 
  pinMode(encoderPinB, INPUT);
  attachInterrupt(digitalPinToInterrupt(encoderPinA), encoderA, CHANGE); 
  attachInterrupt(digitalPinToInterrupt(encoderPinB), encoderB, CHANGE); 
}

void loop() 
{ 
 Angle=encoderPos*(360.0/2048.0)/(64.0/34.0);
 Serial.print("Angle is:");
 Serial.println(Angle);
}