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

#define DHTPIN 7          // Digital pin connected to the DHT sensor
#define DHTTYPE DHT22     // DHT 22 (AM2302) sensor type
DHT dht(DHTPIN, DHTTYPE);

Adafruit_SSD1306 lcd(128, 64, &Wire, 4);
RTC_DS3231 rtc;

void setup() {
  Serial.begin(115200);
  lcd.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  rtc.begin();
  
  dht.begin();
}

void loop() {
  displayHomeScreen();
  delay(1000); // Update screen every second
}

void displayHomeScreen() {
  lcd.clearDisplay();
  lcd.setTextSize(1);
  lcd.setTextColor(WHITE);
  
  // Display current time at the top center
  DateTime now = rtc.now();
  int hour = now.hour();
  int minute = now.minute();
  String period = (hour < 12) ? "AM" : "PM";
  if (hour > 12) hour -= 12;
  lcd.setCursor(42, 0);
  if (hour < 10) lcd.print("0");
  lcd.print(hour);
  lcd.print(':');
  if (minute < 10) lcd.print("0");
  lcd.print(minute);
  lcd.print(" ");
  lcd.print(period);

  // Draw temperature circle
  lcd.fillCircle(23, 21, 19, WHITE);
  lcd.setTextColor(BLACK); // Set text color to black
  lcd.setCursor(9, 17);
  lcd.print(dht.readTemperature(), 1); // Display temperature with one decimal point
  lcd.print("c");

  // Draw humidity circle
  lcd.fillCircle(107, 21, 19, WHITE);
  lcd.setTextColor(BLACK); // Set text color to black
  lcd.setCursor(95, 17);
  lcd.print(dht.readHumidity(), 1); // Display humidity with one decimal point
  lcd.print("%");

  // Draw "Cure Time" 
  lcd.setTextColor(WHITE); // Set text color to white
  lcd.setTextSize(1);
  lcd.setCursor(42, 40);
  lcd.print("Cure Time");

  lcd.display();
}