#define ENCODER_CLK 2
#define ENCODER_DT  3

void setup() {
  Serial.begin(115200);
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
}

int lastClk = HIGH;

void loop() {
  int newClk = digitalRead(ENCODER_CLK);
  if (newClk != lastClk) {
    // There was a change on the CLK pin
    lastClk = newClk;
    int dtValue = digitalRead(ENCODER_DT);
    if (newClk == LOW && dtValue == HIGH) {
      Serial.println("Rotated clockwise ⏩");
    }
    if (newClk == LOW && dtValue == LOW) {
      Serial.println("Rotated counterclockwise ⏪");
    }
  }
}


/*


#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_WIDTH 128  // OLED display width,  in pixels
#define OLED_HEIGHT 64  // OLED display height, in pixels

#define vibOutPin1 9
#define vibOutPin2 10
//SSD1306 Plugs into A4 (SCA) and A5 (SCL)

// INPUT: Potentiometer should be connected to 5V and GND
int potPin1 = A1;  // Potentiometer output connected to analog pin 3
int strength = 0;  // Variable to store the input from the potentiometer
int potPin2 = A2;  // Potentiometer output connected to analog pin 3
int length = 0;    // Variable to store the input from the potentiometer
int potPin3 = A3;  // Potentiometer output connected to analog pin 3
int span = 0;      // Variable to store the input from the potentiometer
int potPin6 = A6;  // Potentiometer output connected to analog pin 3
int count = 0;     // Variable to store the input from the potentiometer
int countdown = 0;     // Variable to store the input from the potentiometer

// declare an SSD1306 display object connected to I2C
Adafruit_SSD1306 oled(OLED_WIDTH, OLED_HEIGHT, &Wire, -1);

void setup() {
  pinMode(vibOutPin1, OUTPUT);  // define a pin as output
  pinMode(vibOutPin2, OUTPUT);  // define a pin as output
  Serial.begin(9600);
  // initialize OLED display with address 0x3C for 128x64
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true)
      ;
  }
  delay(2000);                          // wait for initializing
  oled.clearDisplay();                  // clear display
  oled.setTextSize(2);                  // text size
  oled.setTextColor(WHITE);             // text color
  oled.setCursor(0, 10);                // position to display
  oled.println("Dane's EMDR Tapper");  // text to display
  oled.display();                       // show on OLED
  delay(500);
}

void loop() {
  setPasses();
  setCountdown();
  for (int i = 0; i < count; i++) {
    runTappers();
  };

}  // loop

void setPasses() {
  updateCount();
  oled.clearDisplay();               // clear display
  oled.setCursor(0, 10);             // position to display
  oled.setTextSize(2);                  // text size
  oled.println("Starting in 3");  // text to display
  oled.setCursor(40, 50);            // position to display
  oled.println(count);               // text to display
  oled.display();                    // show on OLED
  delay(1000);
  updateCount();
  oled.clearDisplay();               // clear display
  oled.setCursor(0, 10);             // position to display
  oled.println("Starting in 2");  // text to display
  oled.setCursor(40, 50);            // position to display
  oled.println(count);               // text to display
  oled.display();                    // show on OLED
  delay(1000);
  updateCount();
  oled.clearDisplay();               // clear display
  oled.setCursor(0, 10);             // position to display
  oled.println("Starting in 1");  // text to display
  oled.setCursor(40, 50);            // position to display
  oled.println(count);               // text to display
  oled.display();                    // show on OLED
  delay(1000);
  updateCount();
}

void updateDisplay() {
  updateValues();
  // print potVal
  oled.clearDisplay();  // clear display
  // oled.setTextSize(2);          // text size
  // oled.setTextColor(WHITE);     // text color
  oled.setCursor(0, 5);                             // position to display
  oled.setTextSize(1);                  // text size
  oled.println(String(strength * 100 / 255) + "%");  // text to display
  oled.setCursor(55, 5);                            // position to display
  oled.println(length);                              // text to display
  oled.setCursor(100, 5);                            // position to display
  oled.println(span);                                // text to display
  oled.setCursor(60, 20);                            // position to display
  oled.println(countdown);                               // text to display
  animatedStrength();
  oled.display();                                    // show on OLED
}

void runTappers() {
  updateDisplay();
  analogWrite(vibOutPin1, strength);
  delay(length);
  analogWrite(vibOutPin1, 0);
  delay(span);
  updateDisplay();
  analogWrite(vibOutPin2, strength);
  delay(length);
  analogWrite(vibOutPin2, 0);
  delay(span);
  oled.clearDisplay();  // clear display
  reduceCountdown();
}

void updateValues() {
  strength = analogRead(potPin1);  // read the potentiometer value at the input pin
  strength = (strength) / 4.12;    //normalize potVal
  length = analogRead(potPin2);    // read the potentiometer value at the input pin
  length = (length);               //normalize potVal
  span = analogRead(potPin3);      // read the potentiometer value at the input pin
  span = (span);                   //normalize potVal
}

void updateCount() {
  count = analogRead(potPin6);  // read the potentiometer value at the input pin
  if (count > 700) {
    count = 9999;
  } else {
    count = int((count) / 50) * 5;
  };
}

void setCountdown() {
  countdown = (count);
}

void reduceCountdown() {
  countdown = (countdown) - 1;
}

void animatedStrength() {
  // draw rectangle
  oled.fillRect((29 - (span) / 35), 64 - ((strength) / 6), 1 + ((length) / 33), 64, WHITE);
  oled.fillRect((129 - (29 - (span) / 35) - ((length) / 33)), 64 - ((strength) / 6), 1 + ((length) / 33), 64, WHITE);
//  oled.fillRect((128 - (30 - (span) / 35) - ((length) / 33)), 64 - ((strength) / 6), ((length) / 33), 63, WHITE);
  drawCircle(64, 46, 15, BLACK);
  drawPieSlice(64, 46, 15, WHITE, -90, -90 + (360 * ((countdown) - 1) / ((count) - 1)));
}

void drawPieSlice(int x, int y, int radius, int color, int startAngle, int EndAngle)
{
  for (int i=startAngle; i<EndAngle; i++)
  {
    double radians = i * PI / 180;
    double px = x + radius * cos(radians);
    double py = y + radius * sin(radians);
    oled.drawPixel(px, py, color);
  }
}

void drawCircle(int x, int y, int radius, int color)
{
  drawPieSlice(x, y, radius, color, 0, 360);
}

*/