#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);  // I2C LCD Shield
DHT dht(5, DHT22);  // DHT22 sensor connected to pin 2

const int button1Pin = 7;  // Button 1 pin
const int button2Pin = 6;  // Button 2 pin

bool showCelsius = true;

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(button1Pin, INPUT_PULLUP);
  pinMode(button2Pin, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(button1Pin) == LOW) {
    do {
      showCelsius = true;
    }
    while (digitalRead(button1Pin) == HIGH && digitalRead(button2Pin) == HIGH);  // Wait for the button to be released
  } 
  else if (digitalRead(button2Pin) == LOW) {
    do {
      showCelsius = false;
    }
    while (digitalRead(button2Pin) == HIGH && digitalRead(button1Pin) == HIGH); // Wait for the button to be released
  }

  float temperature = dht.readTemperature();

  if (showCelsius) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp (C):     ");
    lcd.setCursor(0, 1);
    lcd.print(temperature, 1);
  } else {
    // Convert Celsius to Fahrenheit
    lcd.clear();
    float temperatureF = (temperature * 9 / 5) + 32;
    lcd.setCursor(0, 0);
    lcd.print("Temp (F):     ");
    lcd.setCursor(0, 1);
    lcd.print(temperatureF, 1);
  }
  delay(200);  // Update the display every second
}