#define ENCODER_CLK 2
#define ENCODER_DT  3
#define SERIAL_BAUDRATE 115200
#define POT_1 A0


void setup() {
  // put your setup code here, to run once:
  Serial.begin(SERIAL_BAUDRATE);
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  pinMode(POT_1, INPUT);
}

int lastClk = HIGH;

// leitura da entrada analógica
uint8_t readInput (uint8_t const inputPort){
  return analogRead(inputPort);
} 

void loop() {
  // put your main code here, to run repeatedly:
  int newClk = digitalRead(ENCODER_CLK);
  readInput (POT_1);
  Serial.println(analogRead(inputPort));
if (newClk != lastClk) {
    // Houve uma mudança no pino CLK
    lastClk = newClk;
    int dtValue = digitalRead(ENCODER_DT);
    if (newClk == LOW && dtValue == HIGH) {
      Serial.println("Girando no sentido horário ⏩");
    }
    if (newClk == LOW && dtValue == LOW) {
      Serial.println("Girando no sentido anti-horário ⏪");
    }
  }

}