#include "DHT.h"
#include <Servo.h>
#include <Adafruit_Sensor.h>
#include <LiquidCrystal_I2C.h>

#define DHTPIN 2
#define DHTTYPE DHT22
#define BUZZPIN 12
#define NOTE 196
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
Servo servo;
DHT dht(DHTPIN, DHTTYPE);

//void scrollText(String message1, String message2, int delayTime, int lcdColumns) {
//  // Pad the messages with spaces to make sure they can scroll fully
//  for (int i = 0; i < lcdColumns; i++) {
//    message1 = " " + message1;  
//    message2 = " " + message2;
//  } 
//
//  // Loop through the message length and scroll both messages simultaneously
//  for (int pos = 0; pos < message1.length(); pos++) {
//    lcd.setCursor(0, 0);
//    lcd.print(message1.substring(pos, pos + lcdColumns));
//    lcd.setCursor(0, 3);
//    lcd.print(message2.substring(pos, pos + lcdColumns));
//    delay(delayTime);
//  }
//}
void scrollText(int row, String message, int delayTime, int lcdColumns) {
  for (int i=0; i < lcdColumns; i++) {
    message = " " + message;  
  } 
  message = message + " "; 
  for (int pos = 0; pos < message.length(); pos++) {
    lcd.setCursor(0, row);
    lcd.print(message.substring(pos, pos + lcdColumns));
    delay(delayTime);
  }
}

void setup() {
  servo.attach(9);
  lcd.init();
  lcd.backlight();
  pinMode(BUZZPIN, OUTPUT);
  dht.begin();
}

void loop() {
  float humidity = dht.readHumidity();       
  float temperature = dht.readTemperature(); 
  
  if (!isnan(humidity) || !isnan(temperature)) {
    if (temperature > 30.0 && humidity > 70.0) {
      servo.write(90);
      tone(BUZZPIN, NOTE);
    } else {
      servo.write(0);
      noTone(BUZZPIN);
    }
    
    String result_humidity = "Humidity: " + String(humidity) + " %";
    String result_temperature = "Temperature: " + String(temperature) + "*C";
    lcd.setCursor(0, 0);
    lcd.print(result_humidity);
    lcd.setCursor(0, 1);
    lcd.print(result_temperature);
    // Display humidity and temperature simultaneously
    //scrollText(result_humidity, result_temperature, 250, LCD_COLUMNS);
  } else {
    String messageToScroll = "Failed to read from DHT";
    scrollText(3, messageToScroll, 250, LCD_COLUMNS);
  }
  delay(2000);
}