#include <LiquidCrystal_I2C.h>

#define I2C_ADD 0X27
#define ROWS 2
#define COLS 16

#define EN_CLK  5
#define EN_DT 6
#define EN_SW 7
#define TEMP A0
#define LED 4
unsigned int c = 0;
LiquidCrystal_I2C lcd(I2C_ADD, ROWS, COLS);

bool tempSet = false;
unsigned int temp = 0;
int lastClick = HIGH;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  // lcd.init();
  // lcd.backlight();
  pinMode(EN_CLK, INPUT);
  pinMode(EN_DT, INPUT);
  pinMode(EN_SW, INPUT_PULLUP);
  pinMode(LED, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int valTemp = readTemp();
  // Serial.println(valTemp);

  // lcd.setCursor(0,0);
  // lcd.print("TEMP:" +String(valTemp));
  
  int newClick = digitalRead(EN_CLK);
  if(newClick != lastClick){
    lastClick = newClick;
    int dtVal = digitalRead(EN_DT);
   
      if(newClick == LOW && dtVal == HIGH){
        temp++;
         c++;
        // Serial.println(temp);
      }
      if(newClick == LOW && dtVal== LOW){
        temp--;
         c--;
        // Serial.println(temp);
    }
   
    Serial.println(c);
  }
  // lcd.setCursor(0,1);
  // lcd.print("SET:"+String(c));
  // if(digitalRead(EN_SW) == LOW){
  //   tempSet = true;
  //   Serial.println("Temperature set at :" + String(temp));
  // }
  // if(tempSet){
  //   if(valTemp < temp){
  //     digitalWrite(LED,HIGH);
  //     Serial.println("activated");
  //     }
  //   if(valTemp >= 50){
  //     digitalWrite(LED,LOW);
  //     Serial.println("deactivated");
  //     }
  // }
  // delay(100);
}

int readTemp(){
  const float BETA = 3950; // should match the Beta Coefficient of the thermistor
  int analogValue = analogRead(A0);
  int celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  return celsius;
}