#include <Keypad.h>
#include <LiquidCrystal_I2C.h>

float number1=0,number2=0;
char key;

LiquidCrystal_I2C lcd(0x27,16,2);
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  Serial.begin(9600);
lcd.setBacklight(255);
  lcd.begin(16, 2);
  lcd.display();
  lcd.setCursor(0, 0);
  lcd.print("Settemp: ");
  lcd.print(number1);
  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print("-----");
  //lcd.setCursor(10, 0);
}

void loop() {
 key = keypad.getKey();

  //byte key = con;

  if (key != NO_KEY) {
    Serial.println(key);
    settemp1();
   lcd.setCursor(9, 0);
    lcd.print(number1);
    
    }
}
 void settemp1(){
   
   if(key == 'D'){
  number1 = 0;number2 = 0;
  lcd.clear();
  lcd.setBacklight(255);
  lcd.begin(16, 2);
  lcd.display();
  lcd.setCursor(0, 0);
  lcd.print("Settemp: ");
  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print("-----");
}
 if(key == '1'){
  if(number1 == 0){
    number1 = 1;
    }else{
      number1 = (number1*10)+1;
    }
 }
if(key == '2'){
 if(number1 == 0){
    number1 = 2;
    }else{
      number1 = (number1*10)+2;
    }
}
if(key == '3'){
 if(number1 == 0){
    number1 = 3;
    }else{
      number1 = (number1*10)+3;
    }
}
if(key == '4'){
 if(number1 == 0){
    number1 = 4;
    }else{
      number1 = (number1*10)+4;
    }
}
if(key == '5'){
 if(number1 == 0){
    number1 = 5;
    }else{
      number1 = (number1*10)+5;
    }
}
if(key == '6'){
 if(number1 == 0){
    number1 = 6;
    }else{
      number1 = (number1*10)+6;
    }
}
if(key == '7'){
 if(number1 == 0){
    number1 = 7;
    }else{
      number1 = (number1*10)+7;
    }
}
if(key == '8'){
 if(number1 == 0){
    number1 = 8;
    }else{
      number1 = (number1*10)+8;
    }
}
if(key == '9'){
 if(number1 == 0){
    number1 = 9;
    }else{
      number1 = (number1*10)+9;
    }
}
if(key == '0'){
  if(number1 == 0){
    number1 = 0;
    }else{
      number1 = (number1*10)+0;
    }
}
if(key == 'A'){
if(number1 == 0){
    number1 = 0.25;
    }else{
      number1 = number1 + 0.25;
}
}
if(key == 'B'){
if(number1 == 0){
    number1 = 0.50;
    }else{
      number1 = number1 + 0.50;
}
}
if(key == 'C'){
if(number1 == 0){
    number1 = 0.75;
    }else{
      number1 = number1 + 0.75;
}  
 }
 if(key == '#'){
   if(number2 == 0){
    number2 = number1;
}
lcd.setCursor(9, 0);
lcd.print(number2);  
Serial.println(number2);
}
 }