#include <LiquidCrystal_I2C.h>
#include <Wire.h> 
LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

// Rotary Encoder Inputs
#define CLK 2
#define DT 3
#define SW 4

int counter = 0;
int currentStateCLK;
int lastStateCLK;
String currentDir ="";
unsigned long lastButtonPress = 0;

void setup() {
	 lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
	// Set encoder pins as inputs
	pinMode(CLK,INPUT);
	pinMode(DT,INPUT);
	pinMode(SW, INPUT_PULLUP);

	// Setup Serial Monitor
	Serial.begin(9600);
 Serial.println("BE2222GIN");
	// Read the initial state of CLK
	lastStateCLK = digitalRead(CLK);
}

void loop() {
	
	// Read the current state of CLK
	currentStateCLK = digitalRead(CLK);

	// If last and current state of CLK are different, then pulse occurred
	// React to only 1 state change to avoid double count
	if (currentStateCLK != lastStateCLK  && currentStateCLK == 1){

		// If the DT state is different than the CLK state then
		// the encoder is rotating CCW so decrement
		if (digitalRead(DT) != currentStateCLK) {
			counter --;
			currentDir ="CCW";
		} else {
			// Encoder is rotating CW so increment
			counter ++;
			currentDir ="CW";
		}
 lcd.setCursor(3,0);
    lcd.print("Direction: ");
  lcd.setCursor(8,1);
  lcd.println(counter);
		Serial.print("Direction: ");
		Serial.print(currentDir);
		Serial.print(" | Counter: ");
		Serial.println(counter);
	}

	// Remember last CLK state
	lastStateCLK = currentStateCLK;

	// Read the button state
	int btnState = digitalRead(SW);

	//If we detect LOW signal, button is pressed
	if (btnState == LOW) {
		//if 50ms have passed since last LOW pulse, it means that the
		//button has been pressed, released and pressed again
		if (millis() - lastButtonPress > 100) {
       lcd.setCursor(0,1);
  lcd.println("Button pressed!");
			Serial.println("Button pressed!");
      	delay(500);
 lcd.clear();
  lcd.setCursor(3,0);
    lcd.println("Direction: ");
    counter=0;
    lcd.setCursor(8,1);
    lcd.println(counter);
		}

		// Remember last button press event
		lastButtonPress = millis();
	}
if (counter >= 9){
  counter = 9;
}
if (counter <= 1){
  counter = 1;
}
	// Put in a slight delay to help debounce the reading
	delay(1);
}