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

#define DHTPIN 2          // Pin where the DHT sensor is connected
#define DHTTYPE DHT22     // DHT 22 (AM2302)
#define RELAY_PIN 3       // Pin for the relay module

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust the I2C address if necessary

void setup() {
  pinMode(RELAY_PIN, OUTPUT); // Set the relay pin as an output
  lcd.begin(16, 2);           // Initialize the LCD with columns and rows
  dht.begin();                // Initialize the DHT sensor

  // Display project title
  displayTitle("Greenhouse Climate Control ");
  
  // Scroll names
  scrollNames("Emmanuel & Benjamin");
}

void loop() {
  float h = dht.readHumidity();    // Read humidity
  float t = dht.readTemperature();  // Read temperature

  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(t);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(h);
  lcd.print(" %");

  // Control relay based on temperature
  if (t > 30) { // If temperature exceeds 30°C
    digitalWrite(RELAY_PIN, HIGH); // Turn on the fan or heater
  } else {
    digitalWrite(RELAY_PIN, LOW); // Turn off the fan or heater
  }

  delay(2000); // Wait for 2 seconds before the next reading
}

void displayTitle(String title) {
  lcd.clear(); // Clear the LCD
  lcd.setCursor(0, 0); // Set cursor to the first row
  lcd.print(title); // Display the title
  delay(2000); // Display the title for 2 seconds
}

void scrollNames(String names) {
  int length = names.length();
  for (int position = 0; position < length + 16; position++) {
    lcd.clear(); // Clear the LCD
    lcd.setCursor(0, 0); // Set cursor to the first row
    // Display scrolling text
    if (position < length) {
      lcd.print(names.substring(position)); // Show part of the string
    } else {
      lcd.print("                "); // Fill empty space with spaces
      lcd.print(names.substring(position - 16)); // Show the rest of the string
    }
    delay(300); // Adjust delay for scrolling speed
  }
}