#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <DHT.h>
#include <EEPROM.h>

// Project label: LABORATORY_PROJECT_ED05

// Set the I2C address of the LCD
LiquidCrystal_I2C lcd(0x27, 20, 4);

// Set the pin where the DS18B20 is connected
#define ONE_WIRE_BUS 7
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// Set the pin where the PIR sensor is connected
#define PIR_PIN 8

// Set the pin and type of the DHT22 sensor
#define DHT_PIN 9
#define DHT_TYPE DHT22
DHT dht(DHT_PIN, DHT_TYPE);

// EEPROM addresses for storing sensor data
#define EEPROM_TEMP_DS18B20_ADDR 0
#define EEPROM_TEMP_DHT22_ADDR 4
#define EEPROM_HUMIDITY_ADDR 8
#define EEPROM_PIR_ADDR 12

void setup() {
  // Initialize the LCD
  lcd.begin(20, 4);
  lcd.backlight();

  // Display the message "Mi Cholo"
  lcd.setCursor(6, 0);
  lcd.print("Mi Cholo");
  lcd.setCursor(2, 1);
  lcd.print("Mis datos son:");

  // Initialize the DS18B20 sensor
  sensors.begin();
  
  // Initialize the DHT22 sensor
  dht.begin();

  // Set the PIR sensor pin as input
  pinMode(PIR_PIN, INPUT);

  // Display initial labels
  lcd.setCursor(0, 2);
  lcd.print("dht:");
  lcd.setCursor(0, 3);
  lcd.print("hum:");
  lcd.setCursor(11, 2);
  lcd.print("tmp:");
  lcd.setCursor(14, 3);
  lcd.print("Pir:");
}

void loop() {
  // Request temperature reading from DS18B20
  sensors.requestTemperatures();
  
  // Get the temperature in Celsius from DS18B20
  float temperatureC_DS18B20 = sensors.getTempCByIndex(0);
  
  // Display the temperature from DS18B20 on the LCD
  lcd.setCursor(15, 2);
  lcd.print("     ");  // Clear previous content
  lcd.setCursor(15, 2);
  lcd.print(temperatureC_DS18B20);
  
  // Read the state of the PIR sensor
  int pirState = digitalRead(PIR_PIN);
  
  // Display the PIR sensor state on the LCD
  lcd.setCursor(18, 3);
  lcd.print("     ");  // Clear previous content
  lcd.setCursor(18, 3);
  if (pirState == HIGH) {
    lcd.print("Yes");
  } else {
    lcd.print("No");
  }

  // Read the temperature and humidity from DHT22
  float temperatureC_DHT22 = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  // Display the temperature from DHT22 on the LCD
  lcd.setCursor(5, 2);
  lcd.print("     ");  // Clear previous content
  lcd.setCursor(5, 2);
  if (isnan(temperatureC_DHT22)) {
    lcd.print("Error");
  } else {
    lcd.print(temperatureC_DHT22);
  }
  
  // Display the humidity from DHT22 on the LCD
  lcd.setCursor(5, 3);
  lcd.print("     ");  // Clear previous content
  lcd.setCursor(5, 3);
  if (isnan(humidity)) {
    lcd.print("Error");
  } else {
    lcd.print(humidity);
    lcd.print(" %");
  }

  // Store sensor data to EEPROM
  EEPROM.put(EEPROM_TEMP_DS18B20_ADDR, temperatureC_DS18B20);
  EEPROM.put(EEPROM_TEMP_DHT22_ADDR, temperatureC_DHT22);
  EEPROM.put(EEPROM_HUMIDITY_ADDR, humidity);
  EEPROM.put(EEPROM_PIR_ADDR, pirState);

  // Wait 1 second before the next reading
  delay(1000);
}